Since I updated to 1.17 the amount of fps that I usually have has decreased radically, I used to play at more than 200 fps and now most of the time I do not go over 25 fps.
It has nothing to do with my world because I went back to 1.16 to test if it was a world problem but no, the problem is the 1.17 version. Something that surprises me is that before (on 1.16) the game used 50-60% of the gpu and 70 or 80% of the cpu but now in 1.17 it uses 100% of the cpu and 0% of the gpu.

This issue occurs in all the map but its worst in the town where i have my villagers, house and building. If I move away to the forest or to a cave the game struggle to reach 60 fps, but it is disappointing because sometimes has fps drops.

Ps: My current pc has an i3-9100F and a GTX 1060. I play warzone with medium setting and GTA V at Ultra, 80-100 average fps.

Please fix this bug, issue or wathever it is, I love to play minecraft and rn is pretty unplayable.