diff --git a/.github/workflows/Build_wheels_for_cpython27_x86.yml b/.github/workflows/Build_wheels_for_cpython27_x86.yml
index 4eea46a5e..78a7538ca 100644
--- a/.github/workflows/Build_wheels_for_cpython27_x86.yml
+++ b/.github/workflows/Build_wheels_for_cpython27_x86.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython2.7 x86 on Ubuntu18 with GCC-7 with All warnings
+name: Build wheels for CPython2.7 x86 on Ubuntu16 with GCC-5 with All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+18 i386 CPython 2.7
+          - name: Ubuntu 24+16 i386 CPython 2.7
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: bionic
+            release: xenial
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             #pyver: "2.7"
@@ -63,9 +63,9 @@ jobs:
           sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/proc -t proc
           sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/dev/pts -t devpts
           sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/sys -t sysfs
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
           echo "# deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
           echo "# deb [trusted=yes] http://apt.llvm.org/${{matrix.os.release}}/ llvm-toolchain-${{matrix.os.release}}-20 main " > clang.list
           
@@ -85,14 +85,14 @@ jobs:
       - name: Pepare dev files
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y python3
 
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install --no-install-recommends -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkg}} get-pip.py"
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools'" 
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools<72'" 
                     
       - name: Pepare source and build wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
@@ -111,13 +111,22 @@ jobs:
       - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
-          false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} find /build_wheel/
           version=`cat version`
           echo version=$version
           sudo cp -v glibc-check.sh ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ ; echo LLH; ls -lh build/*/zstd.so; echo LDD; ldd build/*/zstd.so;echo FILE; file build/*/zstd.so; echo LIBC; bash ./glibc-check.sh build/*/zstd.so"
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version && ${{matrix.os.pypkg}} setup.py test"
 
+      - name: Test module for SIMD instructions
+        if: matrix.os.matrix == 'linux'
+        run: |
+          version=`cat version`
+          echo version=$version
+          echo cpuinfo
+          ./simd-cklheck-cpuinfo.py
+          sudo cp -v simd-check ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ ; echo LLH; ls -lh build/*/zstd.so; echo SIMD; bash ./simd-check build/*/zstd.so"
+
       - name: Pepare wheel for upload
         if: matrix.os.matrix == 'linux'
         run: |
@@ -127,7 +136,6 @@ jobs:
            sudo ls -lh ./dist/* 
            sudo mv -v ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-linux_${{matrix.os.tag_arch}}.whl" ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-${{matrix.os.libc_tag}}_${{matrix.os.tag_arch}}.whl"
 
-          
       - name: Test for secrets access
         id: check_secrets
         # If a third party makes a pull request
diff --git a/.github/workflows/Build_wheels_for_cpython27_x86_64.yml b/.github/workflows/Build_wheels_for_cpython27_x86_64.yml
index 2d216ce3e..a468db480 100644
--- a/.github/workflows/Build_wheels_for_cpython27_x86_64.yml
+++ b/.github/workflows/Build_wheels_for_cpython27_x86_64.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython2.7 x64 on Ubuntu18 with GCC-7 with All warnings
+name: Build wheels for CPython2.7 x64 on Ubuntu16 with GCC-5 with All warnings
 
 on: [push, pull_request]
 
@@ -14,19 +14,19 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 amd64 CPython 2.7
+          - name: Ubuntu 24+14 amd64 CPython 2.7
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: bionic
+            release: xenial
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             #pyver: "2.7"
             getpipurl: https://bootstrap.pypa.io/pip/2.7/get-pip.py
             pypkg: python2.7
             pyengine_tag: cp27-cp27mu
-            libc_tag: manylinux_2_4
+            libc_tag: manylinux_2_14
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -85,15 +85,15 @@ jobs:
       - name: Pepare dev files
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y python3
 
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkg}} get-pip.py || true"
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools'" 
-                    
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools<72'" 
+
       - name: Pepare source and build wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
@@ -102,9 +102,9 @@ jobs:
           sudo tar -xvf dist/zstd-$version.tar.gz -C ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
           false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} env 
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} pkg-config libzstd --modversion
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC-7
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc-7 -v
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version && CC=gcc-7 ZSTD_ASM=1 _ZSTD_SMALL=1 ZSTD_WARNINGS=1 _ZSTD_WERRORS=1 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=1 ${{matrix.os.pypkg}} setup.py bdist_wheel"
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC-5
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc-5 -v
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version && CC=gcc-5 ZSTD_ASM=1 _ZSTD_SMALL=1 ZSTD_WARNINGS=1 ZSTD_WERRORS=1 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=1 ${{matrix.os.pypkg}} setup.py bdist_wheel"
 
       - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
@@ -122,15 +122,17 @@ jobs:
            sudo cp -v ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/dist/* ./dist
            sudo ls -lh ./dist/* 
            sudo mv -v ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-linux_${{matrix.os.tag_arch}}.whl" ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-${{matrix.os.libc_tag}}_${{matrix.os.tag_arch}}.whl"
-           
 
-#      - name: Upload artifacts
-#        uses: actions/upload-artifact@v4
-#        with:
-#          name: wheels
-#.         path: ./dist
-#          compression-level: 0
-          
+      - name: Test module for SIMD instructions
+        if: matrix.os.matrix == 'linux'
+        run: |
+          version=`cat version`
+          echo version=$version
+          echo cpuinfo
+          ./simd-check-cpuinfo.py
+          sudo cp -v simd-check ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash-c "cd /build_wheel/zstd-$version/ ; echo LLH; ls -lh build/*/zstd.so; echo SIMD; bash ./simd-check build/*/zstd.so"
+
       - name: Test for secrets access
         id: check_secrets
         # If a third party makes a pull request
diff --git a/.github/workflows/Build_wheels_for_cpython27_x86_ext.yml b/.github/workflows/Build_wheels_for_cpython27_x86_ext.yml
index 6f9d0c612..b39f7c717 100644
--- a/.github/workflows/Build_wheels_for_cpython27_x86_ext.yml
+++ b/.github/workflows/Build_wheels_for_cpython27_x86_ext.yml
@@ -88,10 +88,9 @@ jobs:
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt-cache madison clang-18
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkg}} get-pip.py"
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools'" 
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools<72'" 
                     
       - name: Pepare source and build wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
@@ -103,8 +102,8 @@ jobs:
           false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} env
           
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} pkg-config libzstd --modversion 
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC-5
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc-5 -v
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc -v
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version && _CC=clang-20 ZSTD_ASM=1 ZSTD_WARNINGS=1 ZSTD_WERRORS=1 _ZSTD_SMALL=1 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 ZSTD_EXTERNAL=1 CC=gcc-5 ${{matrix.os.pypkg}} setup.py bdist_wheel "
 
       - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
diff --git a/.github/workflows/Build_wheels_for_cpython310_x86_64_u24.yml b/.github/workflows/Build_wheels_for_cpython310_x86_64_u16.yml
similarity index 100%
rename from .github/workflows/Build_wheels_for_cpython310_x86_64_u24.yml
rename to .github/workflows/Build_wheels_for_cpython310_x86_64_u16.yml
diff --git a/.github/workflows/Build_wheels_for_cpython312_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython312_x86_u16.yml
index 97480dff6..8f7d5cd15 100644
--- a/.github/workflows/Build_wheels_for_cpython312_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython312_x86_u16.yml
@@ -24,7 +24,7 @@ jobs:
             getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
             pypkg: python3.12
             pyengine_tag: cp312-cp312
-            libc_tag: manylinux_2_14
+            libc_tag: manylinux_2_4
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
diff --git a/.github/workflows/Build_wheels_for_cpython313_x86_64_u24.yml b/.github/workflows/Build_wheels_for_cpython313_x64_u18.yml
similarity index 88%
rename from .github/workflows/Build_wheels_for_cpython313_x86_64_u24.yml
rename to .github/workflows/Build_wheels_for_cpython313_x64_u18.yml
index 080ce2952..f86acfaa5 100644
--- a/.github/workflows/Build_wheels_for_cpython313_x86_64_u24.yml
+++ b/.github/workflows/Build_wheels_for_cpython313_x64_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.13 x86_64 on Ubuntu22 with GCC-10 All warnings
+name: Build wheels for CPython3.13 x86_64 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+20 amd64 CPython 3.13
+          - name: Ubuntu 24+18 amd64 CPython 3.13
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: jammy
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
             pypkg: python3.13
@@ -61,14 +61,12 @@ jobs:
           sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/proc -t proc
           sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/dev/pts -t devpts
           sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/sys -t sysfs
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
-          echo " deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
-          false && sudo find ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} -iname apt
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
+          echo "# deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
           sudo cp -v ./*.list ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/sources.list.d
-          false && sudo rm -fv ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/trusted.gpg.d/* && sudo rm -fv ./ubuntu-xenial-x86/etc/apt/trusted.gpg
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public.gpg -Orusoft.gpg'
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public-old.gpg -Orusoft-old.gpg'
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A2CE4BCCC50209DD || true'
@@ -167,3 +165,14 @@ jobs:
           TWINE_PASSWORD: "${{ secrets.test_pypi_password }}"
         run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
         
+      - name: Create Release and Upload Assets
+        if: >
+         startsWith(github.event.ref, 'refs/tags') &&
+         steps.check_secrets.outputs.HAS_SECRET
+        # This uses a community action for creating and uploading to a release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: dist/*.whl
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # The default GITHUB_TOKEN has sufficient permissions
\ No newline at end of file
diff --git a/.github/workflows/Build_wheels_for_cpython313_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython313_x86_u18.yml
similarity index 93%
rename from .github/workflows/Build_wheels_for_cpython313_x86_u16.yml
rename to .github/workflows/Build_wheels_for_cpython313_x86_u18.yml
index f121beff7..eb5da41f4 100644
--- a/.github/workflows/Build_wheels_for_cpython313_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython313_x86_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.13 x86 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.13 x86 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,17 +14,17 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 x86 CPython 3.13
+          - name: Ubuntu 24+18 x86 CPython 3.13
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
             pypkg: python3.13
             pyengine_tag: cp313-cp313
-            libc_tag: manylinux_2_14
+            libc_tag: manylinux_2_4
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -66,7 +66,6 @@ jobs:
           echo "# deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
           sudo cp -v ./*.list ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/sources.list.d
-          false && sudo rm -fv ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/trusted.gpg.d/* && sudo rm -fv ./ubuntu-xenial-x86/etc/apt/trusted.gpg
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public.gpg -Orusoft.gpg'
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public-old.gpg -Orusoft-old.gpg'
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A2CE4BCCC50209DD || true'
@@ -165,3 +164,14 @@ jobs:
           TWINE_PASSWORD: "${{ secrets.test_pypi_password }}"
         run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
         
+      - name: Create Release and Upload Assets
+        if: >
+         startsWith(github.event.ref, 'refs/tags') &&
+         steps.check_secrets.outputs.HAS_SECRET
+        # This uses a community action for creating and uploading to a release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: dist/*.whl
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # The default GITHUB_TOKEN has sufficient permissions
\ No newline at end of file
diff --git a/.github/workflows/Build_wheels_for_cpython313t_x64_u16.yml b/.github/workflows/Build_wheels_for_cpython313t_x64_u16.yml
deleted file mode 100644
index 4311ccf12..000000000
--- a/.github/workflows/Build_wheels_for_cpython313t_x64_u16.yml
+++ /dev/null
@@ -1,168 +0,0 @@
-name: Build wheels for CPython3.13-nogil x64 on Ubuntu22 with GCC-10 All warnings
-
-on: [push, pull_request]
-
-concurrency:
-  group: ${{ github.ref }}-${{ github.workflow }}-${{ github.event_name }}-${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) && github.sha || '' }}
-  cancel-in-progress: true
-
-jobs:
-  build_wheels:
-    name: Build wheel - ${{ matrix.os.name }}
-    runs-on: ${{ matrix.os.runs-on }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - name: Ubuntu 24+22 amd64 CPython 3.13-nogil
-            runs-on: ubuntu-latest
-            matrix: linux
-            arch: amd64
-            tag_arch: x86_64
-            release: jammy
-            mirror: http://azure.archive.ubuntu.com/ubuntu
-            getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
-            pypkg: python3.13-nogil
-            pypkgdev: python3.13-dev
-            pypkgexe: python3.13t
-            pyengine_tag: cp313-cp313t
-            libc_tag: manylinux_2_14
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-        with:
-          submodules: 'recursive'
-
-      - name: Update and upgrade Ubuntu 24
-        if: matrix.os.matrix == 'linux'
-        run: |
-          sudo which apt
-          sudo apt update; 
-          sudo apt purge -y firefox lxd snapd;
-          sudo apt install -y zram-config;
-          sudo apt list --upgradable;
-          sudo apt upgrade -y;
-          sudo apt install -f
-
-      - name: Build source distribution with Ubuntu
-        if: matrix.os.matrix == 'linux'
-        run: |
-          sudo apt install -y debootstrap qemu-user;
-          pip install build;
-          python -m build --sdist --outdir dist .
-         
-      - name: Debootstrap Ubuntu ${{matrix.os.release}} ${{matrix.os.arch}}
-        if: matrix.os.matrix == 'linux'
-        run: |
-          sudo debootstrap --no-merged-usr --verbose --include=sudo,wget,curl,gnupg,ca-certificates --arch=${{matrix.os.arch}} ${{matrix.os.release}} ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} ${{matrix.os.mirror}} || tail ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/debootstrap/debootstrap.log
-     
-      - name: Update and Upgrade Ubuntu ${{matrix.os.release}}
-        if: matrix.os.matrix == 'linux'
-        run: |
-          sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel
-          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/proc -t proc
-          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/dev/pts -t devpts
-          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/sys -t sysfs
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
-          echo "# deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
-          echo " deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
-          sudo cp -v ./*.list ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/sources.list.d
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public.gpg -Orusoft.gpg'
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public-old.gpg -Orusoft-old.gpg'
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A2CE4BCCC50209DD || true'
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt upgrade -y
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt -fy install
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt upgrade -y
-           
-           
-      - name: Pepare dev files
-        if: matrix.os.matrix == 'linux'
-        run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev file
-
-      - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
-        if: matrix.os.matrix == 'linux'
-        run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkgdev}} ${{matrix.os.pypkg}} gcc pkg-config ${{matrix.os.pypkgadd}}
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkgexe}} get-pip.py || true"
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkgexe}} -m pip install -U 'setuptools<72.0'" 
-
-      - name: Pepare source and build wheel for ${{matrix.os.pypkgexe}} ${{matrix.os.arch}}
-        if: matrix.os.matrix == 'linux'
-        run: |
-          version=`cat version`
-          sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
-          sudo tar -xvf dist/zstd-$version.tar.gz -C ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} pkg-config libzstd --modversion 
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc -v
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && ZSTD_ASM=1 ZSTD_WARNINGS=1 _ZSTD_SMALL=1 LDFLAGS='-Wl,--as-needed -Wl,-s' ZSTD_BUILD_STRIP=1 _ZSTD_SPEED=0 _ZSTD_SPEEDMAX=0 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=0 ZS5D_WERRORS=1 ${{matrix.os.pypkgexe}} setup.py bdist_wheel"
-
-      - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
-        if: matrix.os.matrix == 'linux'
-        run: |
-          version=`cat version`
-          false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} find /build_wheel/
-          sudo cp -v glibc-check.sh ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && echo LLH; ls -lh build/lib*/zstd.*.so; ldd build/lib*/zstd.*.so ; file build/lib*/zstd.*.so; bash ./glibc-check.sh build/lib*/zstd.*.so"
-          
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && ${{matrix.os.pypkg}} setup.py test"
-
-      - name: Pepare wheel for upload
-        if: matrix.os.matrix == 'linux'
-        run: |
-           version=`cat version`
-           sudo cp -v ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/dist/* ./dist
-           sudo ls -lh ./dist/* 
-           sudo mv -v ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-linux_${{matrix.os.tag_arch}}.whl" ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-${{matrix.os.libc_tag}}_${{matrix.os.tag_arch}}.whl"
-
-          
-      - name: Test for secrets access
-        id: check_secrets
-        # If a third party makes a pull request
-        # this allows automated steps below to be skipped
-        # and leave a clean PR CI run
-        shell: bash
-        run: |
-          unset HAS_SECRET
-          unset HAS_SECRET_TEST
-          if [ -n "$SECRET" ]; then HAS_SECRET='true' ; fi
-          if [ -n "$SECRET_TEST" ]; then HAS_SECRET_TEST='true' ; fi
-          echo ::set-output name=HAS_SECRET::${HAS_SECRET}
-          echo ::set-output name=HAS_SECRET_TEST::${HAS_SECRET_TEST}
-        env:
-          SECRET: "${{ secrets.pypi_password }}"
-          SECRET_TEST: "${{ secrets.test_pypi_password }}"
-
-      - name: Install twine
-        run: pip install 'twine<=6.0.1'
-
-      - name: Publish distribution to PyPI
-        if: >
-         startsWith(github.event.ref, 'refs/tags') &&
-         steps.check_secrets.outputs.HAS_SECRET
-        env:
-          # If the PR/Push has secret access
-          # and PYPI_PASSWORD is in GH Secrets for this repo
-          # and this is a tag, publish to PyPI
-          TWINE_REPOSITORY_URL: https://upload.pypi.org/legacy/
-          TWINE_USERNAME: "${{ secrets.pypi_username }}"
-          TWINE_NON_INTERACTIVE: 1
-          TWINE_PASSWORD: "${{ secrets.pypi_password }}"
-        run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
-
-      - name: Publish distribution to Test PyPI
-        if: steps.check_secrets.outputs.HAS_SECRET
-        env:
-          # If the PR/Push has secret access
-          # and TEST_PYPI_PASSWORD is in GH Secrets for this repo
-          # then publish each build to test PyPI
-          TWINE_REPOSITORY_URL: https://test.pypi.org/legacy/
-          TWINE_USERNAME: "${{ secrets.test_pypi_username }}"
-          TWINE_NON_INTERACTIVE: 1
-          TWINE_PASSWORD: "${{ secrets.test_pypi_password }}"
-        run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
-        
diff --git a/.github/workflows/Build_wheels_for_cpython313t_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython313t_x64_u18.yml
similarity index 90%
rename from .github/workflows/Build_wheels_for_cpython313t_x86_u16.yml
rename to .github/workflows/Build_wheels_for_cpython313t_x64_u18.yml
index 5f11f4bda..370d9e06c 100644
--- a/.github/workflows/Build_wheels_for_cpython313t_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython313t_x64_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.13-nogil x86 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.13-nogil x64 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,20 +14,17 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 i386 CPython 3.13-nogil
+          - name: Ubuntu 24+18 amd64 CPython 3.13-nogil
             runs-on: ubuntu-latest
             matrix: linux
-            arch: i386
-            tag_arch: i686
-            release: xenial
+            arch: amd64
+            tag_arch: x86_64
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
-            #version: 1.5.6.7
-            # pyver: "3.7"
             getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
             pypkg: python3.13-nogil
             pypkgdev: python3.13-dev
             pypkgexe: python3.13t
-            #pypkgadd: python3.13-distutils
             pyengine_tag: cp313-cp313t
             libc_tag: manylinux_2_14
     steps:
@@ -69,11 +66,9 @@ jobs:
           echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
           echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
           echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
-          echo " deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
-          false && sudo find ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} -iname apt
+          echo "# deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
           sudo cp -v ./*.list ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/sources.list.d
-          false && sudo rm -fv ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/trusted.gpg.d/* && sudo rm -fv ./ubuntu-xenial-x86/etc/apt/trusted.gpg
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public.gpg -Orusoft.gpg'
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public-old.gpg -Orusoft-old.gpg'
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A2CE4BCCC50209DD || true'
@@ -101,11 +96,10 @@ jobs:
           version=`cat version`
           sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
           sudo tar -xvf dist/zstd-$version.tar.gz -C ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
-          false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} env 
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} pkg-config libzstd --modversion 
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC
           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc -v
-          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && ZSTD_ASM=1 ZSTD_WARNINGS=1 _ZSTD_SMALL=1 LDFLAGS='-Wl,--as-needed -Wl,-s' ZSTD_BUILD_STRIP=1 _ZSTD_SPEED=0 _ZSTD_SPEEDMAX=0 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=0 ${{matrix.os.pypkgexe}} setup.py bdist_wheel"
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && ZSTD_ASM=1 ZSTD_WARNINGS=1 _ZSTD_SMALL=1 LDFLAGS='-Wl,--as-needed -Wl,-s' ZSTD_BUILD_STRIP=1 _ZSTD_SPEED=0 _ZSTD_SPEEDMAX=0 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=0 ZSTD_WERRORS=1 ${{matrix.os.pypkgexe}} setup.py bdist_wheel"
 
       - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
@@ -172,3 +166,14 @@ jobs:
           TWINE_PASSWORD: "${{ secrets.test_pypi_password }}"
         run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
         
+      - name: Create Release and Upload Assets
+        if: >
+         startsWith(github.event.ref, 'refs/tags') &&
+         steps.check_secrets.outputs.HAS_SECRET
+        # This uses a community action for creating and uploading to a release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: dist/*.whl
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # The default GITHUB_TOKEN has sufficient permissions
\ No newline at end of file
diff --git a/.github/workflows/Build_wheels_for_cpython313t_x86_u18.yml b/.github/workflows/Build_wheels_for_cpython313t_x86_u18.yml
new file mode 100644
index 000000000..94080a4d2
--- /dev/null
+++ b/.github/workflows/Build_wheels_for_cpython313t_x86_u18.yml
@@ -0,0 +1,183 @@
+name: Build wheels for CPython3.13-nogil x86 on Ubuntu18 with GCC-7 All warnings
+
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}-${{ github.event_name }}-${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) && github.sha || '' }}
+  cancel-in-progress: true
+
+jobs:
+  build_wheels:
+    name: Build wheel - ${{ matrix.os.name }}
+    runs-on: ${{ matrix.os.runs-on }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - name: Ubuntu 24+18 i386 CPython 3.13-nogil
+            runs-on: ubuntu-latest
+            matrix: linux
+            arch: i386
+            tag_arch: i686
+            release: bionic
+            mirror: http://azure.archive.ubuntu.com/ubuntu
+            #version: 1.5.6.7
+            # pyver: "3.7"
+            getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
+            pypkg: python3.13-nogil
+            pypkgdev: python3.13-dev
+            pypkgexe: python3.13t
+            #pypkgadd: python3.13-distutils
+            pyengine_tag: cp313-cp313t
+            libc_tag: manylinux_2_4
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: 'recursive'
+
+      - name: Update and upgrade Ubuntu 24
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo which apt
+          sudo apt update; 
+          sudo apt purge -y firefox lxd snapd;
+          sudo apt install -y zram-config;
+          sudo apt list --upgradable;
+          sudo apt upgrade -y;
+          sudo apt install -f
+
+      - name: Build source distribution with Ubuntu
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo apt install -y debootstrap qemu-user;
+          pip install build;
+          python -m build --sdist --outdir dist .
+         
+      - name: Debootstrap Ubuntu ${{matrix.os.release}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo debootstrap --no-merged-usr --verbose --include=sudo,wget,curl,gnupg,ca-certificates --arch=${{matrix.os.arch}} ${{matrix.os.release}} ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} ${{matrix.os.mirror}} || tail ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/debootstrap/debootstrap.log
+     
+      - name: Update and Upgrade Ubuntu ${{matrix.os.release}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel
+          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/proc -t proc
+          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/dev/pts -t devpts
+          sudo mount none ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/sys -t sysfs
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/python ubuntu-${{matrix.os.release}} main" > rusoft-python.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/backports ubuntu-${{matrix.os.release}} main" > rusoft-backports.list
+          echo " deb [trusted=yes] http://packages.rusoft.ru/ppa/rusoft/packages ubuntu-${{matrix.os.release}} main" > rusoft-packages.list
+          echo "# deb [trusted=yes] http://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu ${{matrix.os.release}} main" > deadsnakes.list
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
+          sudo cp -v ./*.list ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/etc/apt/sources.list.d
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public.gpg -Orusoft.gpg'
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'cd /etc/apt/trusted.gpg.d && wget http://packages.rusoft.ru/apt/public-old.gpg -Orusoft-old.gpg'
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c 'apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A2CE4BCCC50209DD || true'
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt update
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt upgrade -y
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt -fy install
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt upgrade -y
+           
+           
+      - name: Pepare dev files
+        if: matrix.os.matrix == 'linux'
+        run: |
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev file
+
+      - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkgdev}} ${{matrix.os.pypkg}} gcc pkg-config ${{matrix.os.pypkgadd}}
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkgexe}} get-pip.py || true"
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkgexe}} -m pip install -U 'setuptools<72.0'" 
+
+      - name: Pepare source and build wheel for ${{matrix.os.pypkgexe}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          version=`cat version`
+          sudo mkdir -p ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
+          sudo tar -xvf dist/zstd-$version.tar.gz -C ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/
+          false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} env 
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} pkg-config libzstd --modversion 
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} echo GCC
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} gcc -v
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && ZSTD_ASM=1 ZSTD_WARNINGS=1 _ZSTD_SMALL=1 ZSTD_BUILD_STRIP=1 _ZSTD_SPEED=0 _ZSTD_SPEEDMAX=0 _ZSTD_ASM_BMI2=1 ZSTD_THREADS=1 _ZSTD_EXTERNAL=0 ${{matrix.os.pypkgexe}} setup.py bdist_wheel"
+
+      - name: Test wheel for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
+        if: matrix.os.matrix == 'linux'
+        run: |
+          version=`cat version`
+          false && sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} find /build_wheel/
+          sudo cp -v glibc-check.sh ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && echo LLH; ls -lh build/lib*/zstd.*.so; ldd build/lib*/zstd.*.so ; file build/lib*/zstd.*.so; bash ./glibc-check.sh build/lib*/zstd.*.so"
+          
+          sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "cd /build_wheel/zstd-$version/ && ${{matrix.os.pypkg}} setup.py test"
+
+      - name: Pepare wheel for upload
+        if: matrix.os.matrix == 'linux'
+        run: |
+           version=`cat version`
+           sudo cp -v ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}}/build_wheel/zstd-$version/dist/* ./dist
+           sudo ls -lh ./dist/* 
+           sudo mv -v ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-linux_${{matrix.os.tag_arch}}.whl" ./dist/"zstd-$version-${{matrix.os.pyengine_tag}}-${{matrix.os.libc_tag}}_${{matrix.os.tag_arch}}.whl"
+
+          
+      - name: Test for secrets access
+        id: check_secrets
+        # If a third party makes a pull request
+        # this allows automated steps below to be skipped
+        # and leave a clean PR CI run
+        shell: bash
+        run: |
+          unset HAS_SECRET
+          unset HAS_SECRET_TEST
+          if [ -n "$SECRET" ]; then HAS_SECRET='true' ; fi
+          if [ -n "$SECRET_TEST" ]; then HAS_SECRET_TEST='true' ; fi
+          echo ::set-output name=HAS_SECRET::${HAS_SECRET}
+          echo ::set-output name=HAS_SECRET_TEST::${HAS_SECRET_TEST}
+        env:
+          SECRET: "${{ secrets.pypi_password }}"
+          SECRET_TEST: "${{ secrets.test_pypi_password }}"
+
+      - name: Install twine
+        run: pip install 'twine<=6.0.1'
+
+      - name: Publish distribution to PyPI
+        if: >
+         startsWith(github.event.ref, 'refs/tags') &&
+         steps.check_secrets.outputs.HAS_SECRET
+        env:
+          # If the PR/Push has secret access
+          # and PYPI_PASSWORD is in GH Secrets for this repo
+          # and this is a tag, publish to PyPI
+          TWINE_REPOSITORY_URL: https://upload.pypi.org/legacy/
+          TWINE_USERNAME: "${{ secrets.pypi_username }}"
+          TWINE_NON_INTERACTIVE: 1
+          TWINE_PASSWORD: "${{ secrets.pypi_password }}"
+        run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
+
+      - name: Publish distribution to Test PyPI
+        if: steps.check_secrets.outputs.HAS_SECRET
+        env:
+          # If the PR/Push has secret access
+          # and TEST_PYPI_PASSWORD is in GH Secrets for this repo
+          # then publish each build to test PyPI
+          TWINE_REPOSITORY_URL: https://test.pypi.org/legacy/
+          TWINE_USERNAME: "${{ secrets.test_pypi_username }}"
+          TWINE_NON_INTERACTIVE: 1
+          TWINE_PASSWORD: "${{ secrets.test_pypi_password }}"
+        run: twine upload --non-interactive --skip-existing --verbose 'dist/*'
+        
+      - name: Create Release and Upload Assets
+        if: >
+         startsWith(github.event.ref, 'refs/tags') &&
+         steps.check_secrets.outputs.HAS_SECRET
+        # This uses a community action for creating and uploading to a release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: dist/*64*.tar.xz
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          # The default GITHUB_TOKEN has sufficient permissions
\ No newline at end of file
diff --git a/.github/workflows/Build_wheels_for_cpython314_x86_64_u24.yml b/.github/workflows/Build_wheels_for_cpython314_x64_u18.yml
similarity index 95%
rename from .github/workflows/Build_wheels_for_cpython314_x86_64_u24.yml
rename to .github/workflows/Build_wheels_for_cpython314_x64_u18.yml
index 3a95409b2..04aa4648f 100644
--- a/.github/workflows/Build_wheels_for_cpython314_x86_64_u24.yml
+++ b/.github/workflows/Build_wheels_for_cpython314_x64_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.14 x86_64 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.14 amd64 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 amd64 CPython 3.14
+          - name: Ubuntu 24+18 amd64 CPython 3.14
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
@@ -84,12 +84,13 @@ jobs:
       - name: Pepare dev files
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev file
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y aptitude
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y libzstd-dev file
 
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkg}} get-pip.py || true"
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools<72.0'" 
                     
diff --git a/.github/workflows/Build_wheels_for_cpython314_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython314_x86_u18.yml
similarity index 95%
rename from .github/workflows/Build_wheels_for_cpython314_x86_u16.yml
rename to .github/workflows/Build_wheels_for_cpython314_x86_u18.yml
index d9974a334..623f018f2 100644
--- a/.github/workflows/Build_wheels_for_cpython314_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython314_x86_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.14 x86 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.14 x86 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,17 +14,17 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 x86 CPython 3.14
+          - name: Ubuntu 24+18 x86 CPython 3.14
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
             pypkg: python3.14
             pyengine_tag: cp314-cp314
-            libc_tag: manylinux_2_14
+            libc_tag: manylinux_2_4
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -81,12 +81,13 @@ jobs:
       - name: Pepare dev files
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev file
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y aptitude
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y libzstd-dev file
 
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y ${{matrix.os.pypkg}}-dev gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkg}} get-pip.py || true"
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkg}} -m pip install -U 'setuptools<72.0'" 
                     
diff --git a/.github/workflows/Build_wheels_for_cpython314t_x64_u16.yml b/.github/workflows/Build_wheels_for_cpython314t_x64_u18.yml
similarity index 95%
rename from .github/workflows/Build_wheels_for_cpython314t_x64_u16.yml
rename to .github/workflows/Build_wheels_for_cpython314t_x64_u18.yml
index f13e835f9..ea2d793ce 100644
--- a/.github/workflows/Build_wheels_for_cpython314t_x64_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython314t_x64_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.14-nogil x64 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.14-nogil x64 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 amd64 CPython 3.14-nogil
+          - name: Ubuntu 24+18 amd64 CPython 3.14-nogil
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
@@ -86,12 +86,13 @@ jobs:
       - name: Pepare dev files
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev file
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y aptitude
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y libzstd-dev file
 
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkgdev}} ${{matrix.os.pypkg}} gcc pkg-config ${{matrix.os.pypkgadd}}
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y ${{matrix.os.pypkgdev}} ${{matrix.os.pypkg}} gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkgexe}} get-pip.py || true"
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkgexe}} -m pip install -U 'setuptools<72.0'"
 
diff --git a/.github/workflows/Build_wheels_for_cpython314t_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython314t_x86_u18.yml
similarity index 95%
rename from .github/workflows/Build_wheels_for_cpython314t_x86_u16.yml
rename to .github/workflows/Build_wheels_for_cpython314t_x86_u18.yml
index 32e6e0f92..16b6deee7 100644
--- a/.github/workflows/Build_wheels_for_cpython314t_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython314t_x86_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.14-nogil x86 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.14-nogil x86 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 i386 CPython 3.14-nogil
+          - name: Ubuntu 24+18 i386 CPython 3.14-nogil
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
@@ -29,7 +29,7 @@ jobs:
             pypkgexe: python3.14t
             #pypkgadd: python3.13-distutils
             pyengine_tag: cp314-cp314t
-            libc_tag: manylinux_2_14
+            libc_tag: manylinux_2_4
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -86,12 +86,13 @@ jobs:
       - name: Pepare dev files
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y libzstd-dev file
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y aptitude
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y libzstd-dev file
 
       - name: Pepare for ${{matrix.os.pypkg}} ${{matrix.os.arch}}
         if: matrix.os.matrix == 'linux'
         run: |
-           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/apt install -y ${{matrix.os.pypkgdev}} ${{matrix.os.pypkg}} gcc pkg-config ${{matrix.os.pypkgadd}}
+           sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /usr/bin/aptitude install -y ${{matrix.os.pypkgdev}} ${{matrix.os.pypkg}} gcc pkg-config ${{matrix.os.pypkgadd}}
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "wget ${{matrix.os.getpipurl}} -O get-pip.py && ${{matrix.os.pypkgexe}} get-pip.py || true"
            sudo chroot ./ubuntu-${{matrix.os.release}}-${{matrix.os.arch}} /bin/bash -c "${{matrix.os.pypkgexe}} -m pip install -U 'setuptools<72.0'"
 
diff --git a/.github/workflows/Build_wheels_for_cpython315_x86_64_u16.yml b/.github/workflows/Build_wheels_for_cpython315_x86_64_u18.yml
similarity index 98%
rename from .github/workflows/Build_wheels_for_cpython315_x86_64_u16.yml
rename to .github/workflows/Build_wheels_for_cpython315_x86_64_u18.yml
index 975c02988..ed51eb085 100644
--- a/.github/workflows/Build_wheels_for_cpython315_x86_64_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython315_x86_64_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.15 x86_64 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.15 x86_64 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 amd64 CPython 3.15
+          - name: Ubuntu 24+18 amd64 CPython 3.15
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
diff --git a/.github/workflows/Build_wheels_for_cpython315_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython315_x86_u18.yml
similarity index 98%
rename from .github/workflows/Build_wheels_for_cpython315_x86_u16.yml
rename to .github/workflows/Build_wheels_for_cpython315_x86_u18.yml
index 4d96628b2..8aacbf40f 100644
--- a/.github/workflows/Build_wheels_for_cpython315_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython315_x86_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.15 x86 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.15 x86 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 i686 CPython 3.15
+          - name: Ubuntu 24+18 i686 CPython 3.15
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
@@ -27,7 +27,7 @@ jobs:
             pypkg: python3.15
             #pypkgadd: python3.13-distutils
             pyengine_tag: cp315-cp315
-            libc_tag: manylinux_2_14
+            libc_tag: manylinux_2_4
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
diff --git a/.github/workflows/Build_wheels_for_cpython315t_x64_u16.yml b/.github/workflows/Build_wheels_for_cpython315t_x64_u18.yml
similarity index 98%
rename from .github/workflows/Build_wheels_for_cpython315t_x64_u16.yml
rename to .github/workflows/Build_wheels_for_cpython315t_x64_u18.yml
index 931574582..8d1c640cb 100644
--- a/.github/workflows/Build_wheels_for_cpython315t_x64_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython315t_x64_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.15-nogil x64 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.15-nogil x64 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 amd64 CPython 3.15-nogil
+          - name: Ubuntu 24+18 amd64 CPython 3.15-nogil
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: xenial
+            release: bioic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
diff --git a/.github/workflows/Build_wheels_for_cpython315t_x86_u16.yml b/.github/workflows/Build_wheels_for_cpython315t_x86_u18.yml
similarity index 97%
rename from .github/workflows/Build_wheels_for_cpython315t_x86_u16.yml
rename to .github/workflows/Build_wheels_for_cpython315t_x86_u18.yml
index e7e1bca9b..ae9eb6f0f 100644
--- a/.github/workflows/Build_wheels_for_cpython315t_x86_u16.yml
+++ b/.github/workflows/Build_wheels_for_cpython315t_x86_u18.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.15-nogil x86 on Ubuntu16 with GCC-5 All warnings
+name: Build wheels for CPython3.15-nogil x86 on Ubuntu18 with GCC-7 All warnings
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 i386 CPython 3.15-nogil
+          - name: Ubuntu 24+18 i386 CPython 3.15-nogil
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
@@ -29,7 +29,7 @@ jobs:
             pypkgexe: python3.15t
             #pypkgadd: python3.13-distutils
             pyengine_tag: cp315-cp315t
-            libc_tag: manylinux_2_14
+            libc_tag: manylinux_2_4
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
diff --git a/.github/workflows/Build_wheels_for_cpython34_x86.yml b/.github/workflows/Build_wheels_for_cpython34_x86.yml
index ba01e788a..c80a0509a 100644
--- a/.github/workflows/Build_wheels_for_cpython34_x86.yml
+++ b/.github/workflows/Build_wheels_for_cpython34_x86.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.4 x86 on Ubuntu16
+name: Build wheels for CPython3.4 x86 on Ubuntu18
 
 on: [push, pull_request]
 
@@ -14,12 +14,12 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 i386 CPython 3.4
+          - name: Ubuntu 24+18 i386 CPython 3.4
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
             tag_arch: i686
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             #pyver: "3.4"
diff --git a/.github/workflows/Build_wheels_for_cpython34_x86_64.yml b/.github/workflows/Build_wheels_for_cpython34_x86_64.yml
index 0946db31c..e2b5b851d 100644
--- a/.github/workflows/Build_wheels_for_cpython34_x86_64.yml
+++ b/.github/workflows/Build_wheels_for_cpython34_x86_64.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.4 x86_64 on Ubuntu16
+name: Build wheels for CPython3.4 x86_64 on Ubuntu18
 
 on: [push, pull_request]
 
@@ -14,19 +14,19 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 amd64 CPython 3.4
+          - name: Ubuntu 24+18 amd64 CPython 3.4
             runs-on: ubuntu-latest
             matrix: linux
             arch: amd64
             tag_arch: x86_64
-            release: xenial
+            release: bionic
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             #pyver: "3.4"
             getpipurl: https://bootstrap.pypa.io/pip/3.4/get-pip.py
             pypkg: python3.4
             pyengine_tag: cp34-cp34m
-            libc_tag: manylinux_2_4
+            libc_tag: manylinux_2_14
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
diff --git a/.github/workflows/Build_wheels_for_cpython35_x86_64_u20.yml b/.github/workflows/Build_wheels_for_cpython35_x64_u16.yml
similarity index 99%
rename from .github/workflows/Build_wheels_for_cpython35_x86_64_u20.yml
rename to .github/workflows/Build_wheels_for_cpython35_x64_u16.yml
index 2e6ab6f63..1ae2779de 100644
--- a/.github/workflows/Build_wheels_for_cpython35_x86_64_u20.yml
+++ b/.github/workflows/Build_wheels_for_cpython35_x64_u16.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.5 x86_64 on Ubuntu16 with GCC-5 All warnings errors 
+name: Build wheels for CPython3.5 x64 on Ubuntu16 with GCC-5 All warnings errors 
 
 on: [push, pull_request]
 
diff --git a/.github/workflows/Build_wheels_for_cpython36_x86_64_u20.yml b/.github/workflows/Build_wheels_for_cpython36_x64_u16.yml
similarity index 99%
rename from .github/workflows/Build_wheels_for_cpython36_x86_64_u20.yml
rename to .github/workflows/Build_wheels_for_cpython36_x64_u16.yml
index a4d3967f4..8d385ee07 100644
--- a/.github/workflows/Build_wheels_for_cpython36_x86_64_u20.yml
+++ b/.github/workflows/Build_wheels_for_cpython36_x64_u16.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.6 x86_64 on Ubuntu16 with All warnings errors 
+name: Build wheels for CPython3.6 x64 on Ubuntu16 with All warnings errors 
 
 on: [push, pull_request]
 
diff --git a/.github/workflows/Build_wheels_for_cpython37_x86_64_u24.yml b/.github/workflows/Build_wheels_for_cpython37_x64_u16.yml
similarity index 100%
rename from .github/workflows/Build_wheels_for_cpython37_x86_64_u24.yml
rename to .github/workflows/Build_wheels_for_cpython37_x64_u16.yml
diff --git a/.github/workflows/Build_wheels_for_cpython38_x86_64_u24.yml b/.github/workflows/Build_wheels_for_cpython38_x64_u16.yml
similarity index 100%
rename from .github/workflows/Build_wheels_for_cpython38_x86_64_u24.yml
rename to .github/workflows/Build_wheels_for_cpython38_x64_u16.yml
diff --git a/.github/workflows/Build_wheels_for_cpython39_x86_64_u24.yml b/.github/workflows/Build_wheels_for_cpython39_x64_u16.yml
similarity index 98%
rename from .github/workflows/Build_wheels_for_cpython39_x86_64_u24.yml
rename to .github/workflows/Build_wheels_for_cpython39_x64_u16.yml
index 7be8b8df3..ee1752627 100644
--- a/.github/workflows/Build_wheels_for_cpython39_x86_64_u24.yml
+++ b/.github/workflows/Build_wheels_for_cpython39_x64_u16.yml
@@ -1,4 +1,4 @@
-name: Build wheels for CPython3.9 x86_64 on Ubuntu16
+name: Build wheels for CPython3.9 x64 on Ubuntu16
 
 on: [push, pull_request]
 
@@ -23,7 +23,7 @@ jobs:
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             # pyver: "3.7"
-            getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
+            getpipurl: https://bootstrap.pypa.io/pip/3.9/get-pip.py
             pypkg: python3.9
             pypkgadd: python3.9-distutils
             pyengine_tag: cp39-cp39
diff --git a/.github/workflows/Build_wheels_for_cpython39_x86.yml b/.github/workflows/Build_wheels_for_cpython39_x86.yml
index f2ae642cc..bbe1f45ba 100644
--- a/.github/workflows/Build_wheels_for_cpython39_x86.yml
+++ b/.github/workflows/Build_wheels_for_cpython39_x86.yml
@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - name: Ubuntu 24+16 i386 CPython 3.9
+          - name: Ubuntu 24+16 i686 CPython 3.9
             runs-on: ubuntu-latest
             matrix: linux
             arch: i386
@@ -23,7 +23,7 @@ jobs:
             mirror: http://azure.archive.ubuntu.com/ubuntu
             #version: 1.5.6.7
             #pyver: "3.9"
-            getpipurl: https://bootstrap.pypa.io/pip/get-pip.py
+            getpipurl: https://bootstrap.pypa.io/pip/3.9/get-pip.py
             pypkg: python3.9
             pypkgadd: python3.9-distutils
             pyengine_tag: cp39-cp39
diff --git a/.github/workflows/build-wheels.yml b/.github/workflows/build-wheels.yml
index df2e15184..c6b30a8c7 100644
--- a/.github/workflows/build-wheels.yml
+++ b/.github/workflows/build-wheels.yml
@@ -188,6 +188,8 @@ jobs:
               matrix: windows
             cibw:
               build: cp27-*
+              build: cp36-*
+              build: cp38-*
           - os:
               matrix: macos
             cibw:
@@ -298,7 +300,7 @@ jobs:
           CIBW_BUILD: ${{ matrix.cibw.build }}
           CIBW_BUILD_VERBOSITY: 2
           # Skip 32-bit builds // NO
-          # CIBW_SKIP: '*-win32 *_i686'
+          CIBW_SKIP: 'cp36-win* cp38-win*'
           CIBW_MANYLINUX_I686_IMAGE: ${{ matrix.cibw.manylinux }}
           CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.cibw.manylinux }}
           CIBW_MUSLLINUX_I686_IMAGE: ${{ matrix.cibw.musllinux }}
@@ -330,7 +332,7 @@ jobs:
           CIBW_BUILD: ${{ matrix.cibw.build }}
           CIBW_BUILD_VERBOSITY: 2
           # Skip 32-bit builds // NO
-          # CIBW_SKIP: '*-win32 *_i686'
+          CIBW_SKIP: 'cp36-win* cp38-win*'
           CIBW_MANYLINUX_I686_IMAGE: ${{ matrix.cibw.manylinux }}
           CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.cibw.manylinux }}
           CIBW_MANYLINUX_AARCH64_IMAGE: ${{ matrix.cibw.manylinux }}
@@ -363,7 +365,7 @@ jobs:
           CIBW_BUILD: ${{ matrix.cibw.build }}
           CIBW_BUILD_VERBOSITY: 2
           # Skip 32-bit builds // NO
-          # CIBW_SKIP: '*-win32 *_i686'
+          CIBW_SKIP: 'cp36-win* cp38-win*'
           CIBW_MANYLINUX_I686_IMAGE: ${{ matrix.cibw.manylinux }}
           CIBW_MANYLINUX_X86_64_IMAGE: ${{ matrix.cibw.manylinux }}
           CIBW_MANYLINUX_AARCH64_IMAGE: ${{ matrix.cibw.manylinux }}
diff --git a/simd-check b/simd-check
new file mode 100755
index 000000000..a46fe89a1
--- /dev/null
+++ b/simd-check
@@ -0,0 +1,73 @@
+#!/bin/bash
+
+tmpf=`tempfile`
+echo tmpf=$tmpf
+
+echo "File:$1"
+echo " dump ASM instructions..."
+objdump -d $1>$tmpf
+
+echo -en "count SSE lines:"
+# Source - https://stackoverflow.com/a/50056059
+# Posted by Andriy Makukha, modified by community. See post 'Timeline' for change history
+# Retrieved 2026-03-31, License - CC BY-SA 4.0
+
+awk '/[ \t](addps|andnps|andps|cmpps|cvtpi2ps|cvtps2pi|cvttps2pi|divps|maxps|minps|movaps|movhlps|movhps|movlhps|movlps|movmskps|movntps|movntq|movups|mulps|orps|pavgb|pavgw|pextrw|pinsrw|pmaxsw|pmaxub|pminsw|pminub|pmovmskb|pmulhuw|psadbw|pshufw|rcpps|rsqrtps|shufps|sqrtps|subps|unpckhps|unpcklps|xorps)[ \t]/' $tmpf | wc -l
+
+echo -en "count SSE2 lines:"
+
+# Source - https://stackoverflow.com/a/50056059
+# Posted by Andriy Makukha, modified by community. See post 'Timeline' for change history
+# Retrieved 2026-03-31, License - CC BY-SA 4.0
+
+awk '/[ \t](addpd|addsd|andnpd|andpd|cmppd|comisd|cvtdq2pd|cvtdq2ps|cvtpd2dq|cvtpd2pi|cvtpd2ps|cvtpi2pd|cvtps2dq|cvtps2pd|cvtsd2si|cvtsd2ss|cvtsi2sd|cvtss2sd|cvttpd2dq|cvttpd2pi|cvtps2dq|cvttsd2si|divpd|divsd|maxpd|maxsd|minpd|minsd|movapd|movhpd|movlpd|movmskpd|movupd|mulpd|mulsd|orpd|shufpd|sqrtpd|sqrtsd|subpd|subsd|ucomisd|unpckhpd|unpcklpd|xorpd|movdq2q|movdqa|movdqu|movq2dq|paddq|pmuludq|pshufhw|pshuflw|pshufd|pslldq|psrldq|punpckhqdq|punpcklqdq)[ \t]/' $tmpf | wc -l
+
+echo -en "count SSE3 lines:"
+
+# Source - https://stackoverflow.com/a/50056059
+# Posted by Andriy Makukha, modified by community. See post 'Timeline' for change history
+# Retrieved 2026-03-31, License - CC BY-SA 4.0
+
+awk '/[ \t](addsubpd|addsubps|haddpd|haddps|hsubpd|hsubps|movddup|movshdup|movsldup|lddqu|fisttp)[ \t]/' $tmpf | wc -l
+
+echo -en "count SSSE3 lines:"
+
+# Source - https://stackoverflow.com/a/50056059
+# Posted by Andriy Makukha, modified by community. See post 'Timeline' for change history
+# Retrieved 2026-03-31, License - CC BY-SA 4.0
+
+awk '/[ \t](psignw|psignd|psignb|pshufb|pmulhrsw|pmaddubsw|phsubw|phsubsw|phsubd|phaddw|phaddsw|phaddd|palignr|pabsw|pabsd|pabsb)[ \t]/' $tmpf | wc -l
+
+echo -en "count SSE4 lines:"
+
+# Source - https://stackoverflow.com/a/50056059
+# Posted by Andriy Makukha, modified by community. See post 'Timeline' for change history
+# Retrieved 2026-03-31, License - CC BY-SA 4.0
+
+awk '/[ \t](mpsadbw|phminposuw|pmulld|pmuldq|dpps|dppd|blendps|blendpd|blendvps|blendvpd|pblendvb|pblenddw|pminsb|pmaxsb|pminuw|pmaxuw|pminud|pmaxud|pminsd|pmaxsd|roundps|roundss|roundpd|roundsd|insertps|pinsrb|pinsrd|pinsrq|extractps|pextrb|pextrd|pextrw|pextrq|pmovsxbw|pmovzxbw|pmovsxbd|pmovzxbd|pmovsxbq|pmovzxbq|pmovsxwd|pmovzxwd|pmovsxwq|pmovzxwq|pmovsxdq|pmovzxdq|ptest|pcmpeqq|pcmpgtq|packusdw|pcmpestri|pcmpestrm|pcmpistri|pcmpistrm|crc32|popcnt|movntdqa|extrq|insertq|movntsd|movntss|lzcnt)[ \t]/' $tmpf | wc -l
+
+echo -en "count AVX lines:"
+
+# Source - https://stackoverflow.com/a/50056059
+# Posted by Andriy Makukha, modified by community. See post 'Timeline' for change history
+# Retrieved 2026-03-31, License - CC BY-SA 4.0
+
+awk '/[ \t](vmovapd|vmulpd|vaddpd|vsubpd|vfmadd213pd|vfmadd231pd|vfmadd132pd|vmulsd|vaddsd|vmosd|vsubsd|vbroadcastss|vbroadcastsd|vblendpd|vshufpd|vroundpd|vroundsd|vxorpd|vfnmadd231pd|vfnmadd213pd|vfnmadd132pd|vandpd|vmaxpd|vmovmskpd|vcmppd|vpaddd|vbroadcastf128|vinsertf128|vextractf128|vfmsub231pd|vfmsub132pd|vfmsub213pd|vmaskmovps|vmaskmovpd|vpermilps|vpermilpd|vperm2f128|vzeroall|vzeroupper|vpbroadcastb|vpbroadcastw|vpbroadcastd|vpbroadcastq|vbroadcasti128|vinserti128|vextracti128|vpminud|vpmuludq|vgatherdpd|vgatherqpd|vgatherdps|vgatherqps|vpgatherdd|vpgatherdq|vpgatherqd|vpgatherqq|vpmaskmovd|vpmaskmovq|vpermps|vpermd|vpermpd|vpermq|vperm2i128|vpblendd|vpsllvd|vpsllvq|vpsrlvd|vpsrlvq|vpsravd|vblendmpd|vblendmps|vpblendmd|vpblendmq|vpblendmb|vpblendmw|vpcmpd|vpcmpud|vpcmpq|vpcmpuq|vpcmpb|vpcmpub|vpcmpw|vpcmpuw|vptestmd|vptestmq|vptestnmd|vptestnmq|vptestmb|vptestmw|vptestnmb|vptestnmw|vcompresspd|vcompressps|vpcompressd|vpcompressq|vexpandpd|vexpandps|vpexpandd|vpexpandq|vpermb|vpermw|vpermt2b|vpermt2w|vpermi2pd|vpermi2ps|vpermi2d|vpermi2q|vpermi2b|vpermi2w|vpermt2ps|vpermt2pd|vpermt2d|vpermt2q|vshuff32x4|vshuff64x2|vshuffi32x4|vshuffi64x2|vpmultishiftqb|vpternlogd|vpternlogq|vpmovqd|vpmovsqd|vpmovusqd|vpmovqw|vpmovsqw|vpmovusqw|vpmovqb|vpmovsqb|vpmovusqb|vpmovdw|vpmovsdw|vpmovusdw|vpmovdb|vpmovsdb|vpmovusdb|vpmovwb|vpmovswb|vpmovuswb|vcvtps2udq|vcvtpd2udq|vcvttps2udq|vcvttpd2udq|vcvtss2usi|vcvtsd2usi|vcvttss2usi|vcvttsd2usi|vcvtps2qq|vcvtpd2qq|vcvtps2uqq|vcvtpd2uqq|vcvttps2qq|vcvttpd2qq|vcvttps2uqq|vcvttpd2uqq|vcvtudq2ps|vcvtudq2pd|vcvtusi2ps|vcvtusi2pd|vcvtusi2sd|vcvtusi2ss|vcvtuqq2ps|vcvtuqq2pd|vcvtqq2pd|vcvtqq2ps|vgetexppd|vgetexpps|vgetexpsd|vgetexpss|vgetmantpd|vgetmantps|vgetmantsd|vgetmantss|vfixupimmpd|vfixupimmps|vfixupimmsd|vfixupimmss|vrcp14pd|vrcp14ps|vrcp14sd|vrcp14ss|vrndscaleps|vrndscalepd|vrndscaless|vrndscalesd|vrsqrt14pd|vrsqrt14ps|vrsqrt14sd|vrsqrt14ss|vscalefps|vscalefpd|vscalefss|vscalefsd|valignd|valignq|vdbpsadbw|vpabsq|vpmaxsq|vpmaxuq|vpminsq|vpminuq|vprold|vprolvd|vprolq|vprolvq|vprord|vprorvd|vprorq|vprorvq|vpscatterdd|vpscatterdq|vpscatterqd|vpscatterqq|vscatterdps|vscatterdpd|vscatterqps|vscatterqpd|vpconflictd|vpconflictq|vplzcntd|vplzcntq|vpbroadcastmb2q|vpbroadcastmw2d|vexp2pd|vexp2ps|vrcp28pd|vrcp28ps|vrcp28sd|vrcp28ss|vrsqrt28pd|vrsqrt28ps|vrsqrt28sd|vrsqrt28ss|vgatherpf0dps|vgatherpf0qps|vgatherpf0dpd|vgatherpf0qpd|vgatherpf1dps|vgatherpf1qps|vgatherpf1dpd|vgatherpf1qpd|vscatterpf0dps|vscatterpf0qps|vscatterpf0dpd|vscatterpf0qpd|vscatterpf1dps|vscatterpf1qps|vscatterpf1dpd|vscatterpf1qpd|vfpclassps|vfpclasspd|vfpclassss|vfpclasssd|vrangeps|vrangepd|vrangess|vrangesd|vreduceps|vreducepd|vreducess|vreducesd|vpmovm2d|vpmovm2q|vpmovm2b|vpmovm2w|vpmovd2m|vpmovq2m|vpmovb2m|vpmovw2m|vpmullq|vpmadd52luq|vpmadd52huq|v4fmaddps|v4fmaddss|v4fnmaddps|v4fnmaddss|vp4dpwssd|vp4dpwssds|vpdpbusd|vpdpbusds|vpdpwssd|vpdpwssds|vpcompressb|vpcompressw|vpexpandb|vpexpandw|vpshld|vpshldv|vpshrd|vpshrdv|vpopcntd|vpopcntq|vpopcntb|vpopcntw|vpshufbitqmb|gf2p8affineinvqb|gf2p8affineqb|gf2p8mulb|vpclmulqdq|vaesdec|vaesdeclast|vaesenc|vaesenclast)[ \t]/' $tmpf | wc -l
+
+echo -en "count AVX2 lines:"
+
+grep -c ymm $tmpf
+
+echo -en "count AVX512 lines:"
+
+grep -c zmm $tmpf
+
+echo -en "count BMI lines:"
+
+grep -cE "tzcnt|lzcnt|andn|bextr" $tmpf
+
+echo -en "count BMI2 lines:"
+
+grep -cE "bzhi|pdep|pext|sarx|shlx|shrx" $tmpf
+
+rm -f $tmpf
\ No newline at end of file
diff --git a/simd-check-cpuinfo.py b/simd-check-cpuinfo.py
new file mode 100755
index 000000000..5a675d921
--- /dev/null
+++ b/simd-check-cpuinfo.py
@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+cpuinfofp = "/proc/cpuinfo"
+
+f = open(cpuinfofp,"r")
+lines = f.readlines()
+f.close()
+
+flagsln = ""
+
+for line in lines:
+  if line.startswith("flags\t\t:"):
+    flagsln = line
+    break
+
+if not flagsln:
+  print("line with flags not found. lines:")
+  print(lines)
+  sys.exit(1)
+
+flags = flagsln.split(':')[1].strip().split()
+#print("found flags:")
+#print(flags)
+
+sys.stdout.write("SSE: ")
+if 'sse' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("SSE2: ")
+if 'sse2' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("SSE3: ")
+if 'sse3' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("sSSE3: ")
+if 'ssse3' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("SSE4.1: ")
+if 'sse4_1' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("SSE4.2: ")
+if 'sse4_2' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("AVX: ")
+if 'avx' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("AVX2: ")
+if 'avx2' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("AVX512f: ")
+if 'avx512f' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("AVX512vl: ")
+if 'avx512vl' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("AVX512dq: ")
+if 'avx512dq' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("AVX512bw: ")
+if 'avx512bw' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("FMA: ")
+if 'fma' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("F16C: ")
+if 'f16c' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("BMI1: ")
+if 'bmi1' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
+
+sys.stdout.write("BMI2: ")
+if 'bmi2' in flags:
+  sys.stdout.write("yes\n")
+else:
+  sys.stdout.write("no\n")
diff --git a/src/util.c b/src/util.c
index 2e2de2d7c..e0a62b7dd 100644
--- a/src/util.c
+++ b/src/util.c
@@ -40,7 +40,11 @@ typedef BOOL(WINAPI* LPFN_GLPI)(PSYSTEM_LOGICAL_PROCESSOR_INFORMATION, PDWORD);
 int UTIL_countAvailableCores(void)
 {
     time_t currTime = time(NULL);
-    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) numLogicalCores = 0;
+    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) {
+        printdn("Cache reach TTL. Drop numLogicalCores.", numLogicalCores);
+        numLogicalCores = 0;
+    }
+
     if (numLogicalCores != 0) return numLogicalCores;
 
     {   LPFN_GLPI glpi;
@@ -120,7 +124,11 @@ int UTIL_countAvailableCores(void)
 int UTIL_countAvailableCores(void)
 {
     time_t currTime = time(NULL);
-    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) numLogicalCores = 0;
+    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) {
+        printdn("Cache reach TTL. Drop numLogicalCores.", numLogicalCores);
+        numLogicalCores = 0;
+    }
+
     if (numLogicalCores != 0) return numLogicalCores;
 
     {   size_t size = sizeof(int32_t);
@@ -147,7 +155,10 @@ int UTIL_countAvailableCores(void)
 int UTIL_countAvailableCores_posix_sysconf(void)
 {
     time_t currTime = time(NULL);
-    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) numLogicalCores = 0;
+    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) {
+        printdn("Cache reach TTL. Drop numLogicalCores.", numLogicalCores);
+        numLogicalCores = 0;
+    }
 
     if (numLogicalCores != 0) {
         printdn("Stored static numLogicalCores: %d\n", numLogicalCores);
@@ -177,7 +188,10 @@ int UTIL_countAvailableCores(void) {
 int UTIL_countAvailableCores_parse_cpuinfo(void)
 {
     time_t currTime = time(NULL);
-    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) numLogicalCores = 0;
+    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) {
+        printdn("Cache reach TTL. Drop numLogicalCores.", numLogicalCores);
+        numLogicalCores = 0;
+    }
 
     if (numLogicalCores != 0) {
         printdn("Stored static numLogicalCores: %d\n", numLogicalCores);
@@ -269,7 +283,10 @@ int UTIL_countAvailableCores_parse_cpuinfo(void)
 int UTIL_countAvailableCores(void)
 {
     time_t currTime = time(NULL);
-    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) numLogicalCores = 0;
+    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) {
+        printdn("Cache reach TTL. Drop numLogicalCores.", numLogicalCores);
+        numLogicalCores = 0;
+    }
 
     if (numLogicalCores != 0) return numLogicalCores;
 
@@ -302,7 +319,10 @@ int UTIL_countAvailableCores(void)
 int UTIL_countAvailableCores(void)
 {
     time_t currTime = time(NULL);
-    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) numLogicalCores = 0;
+    if (lastTimeCached && currTime-lastTimeCached>util_cpuCoresCacheTTL) {
+        printdn("Cache reach TTL. Drop numLogicalCores.", numLogicalCores);
+        numLogicalCores = 0;
+    }
 
     if (numLogicalCores != 0) return numLogicalCores;
 
diff --git a/src/util.h b/src/util.h
index fbb635e28..8f5e773ca 100644
--- a/src/util.h
+++ b/src/util.h
@@ -67,11 +67,11 @@ extern "C" {
 #endif
 
 #if defined(_WIN32) || defined(WIN32)
- static int numLogicalCores = 1;
+ static int numLogicalCores = 0;
  static time_t lastTimeCached = 0;
  static int util_cpuCoresCacheTTL = 60;
 #else
-__attribute__((unused)) static int numLogicalCores = 1;
+__attribute__((unused)) static int numLogicalCores = 0;
 __attribute__((unused)) static time_t lastTimeCached = 0;
 __attribute__((unused)) static int util_cpuCoresCacheTTL = 60;
 #endif