I noticed a fairly important fps drop (from 60+fps to ~45fps) when I'm in a village after adding quark (I'm playing on the latest forge 1.16.5 version and with optifine G6).
Yes I'm using the most recent versions of autoreglib and quark.
Note that I'm using performant too.
latest.log

Oh and I'm also using chocapic13's shader.

So I tried without both optifine and performant, then with optifine only, and I didn't notice any particular fps drop in any case.
It might be tied to performant then, because I gained an overall 15fps after adding it expect when a village is loaded.
I'd really like to use quark, but it's eating quite a lot of fps overall, so I'm considering not using it (I'm not using charm already because it's even worse).
I'd just prefer to remove quark instead of performant because a smooth experience is more important.