Not to my knowledge but I could be wrong.
Sorry, but I have no idea.
I can only say that Brunnis did some testing and found that shaders had no impact on input lag. Feel free to read over this thread over on the Retroarch forums about his testing and findings.
https://forums.libretro.com/t/an-input-lag-investigation/4407
Again, I have no idea. These are all Linux based questions and as much as I love Linux and use it on my old laptop my knowledge of it when it comes to all the nitty gritty gaming related stuff I simply don't know. These are the sort of questions best asked on the Retroarch and Mame forums.