bgfx vulkan performance

[dankrusi]

hi community, i am just porting a 2d game engine from wgpu to bgfx. i am a bit surprised to find that bgfx vulkan is about 4x slower than wgpu vulkan. is that expected? wgpu i have about 4000fps on vulkan, on bgfx i have 800fps on vulkan, 3400 fps on dx11, and 400fps on dx12. i have done a lot of digging and attempts to get the fps up - it seems my engine has lots of views which are better on wgpu. thanks for any high level tips or comments.