There has been a lot of changes in Minecraft that most of my improvements can't be updated anymore or have no effect in newer versions, which makes updating the mod not just an update, but look into new ways to improve the game.
As that takes a lot of time I don't have, it's very unlikely that BetterFps will be updated in the near future. Sorry.

oh,
i understand,to be fair i forgot that i posted this issue,
since then i discovered many optimization mods that really helped me out.
thanks for your time,
have a nice day