After I updated to the version on June 14th, I entered the game using the previous save and found that the FPS of the game was less than 2FPS. At first, I thought it was the mods I added, but after these mods were excluded. Still found the graphics performance is very poor, at this time, in the W10 task manager view, my i3-9350KF all occupy about 80%, AMD RX580 2048SP occupy about 15%
stand-alone
(dev branch, c0562a7)

The snapshot you are on was generated May 31 (roughly two weeks ago). This is the first I am hearing of a graphics issue on that snapshot.

Which version were you playing on previously?

If you got it from CurseForge, then chances are it was 1.2.2.1.

One thing you could try is setting B:onDemandAnimatedTextures=true in the config file loliasm.cfg. This is roughly the same as the texture animation disabling option from VanillaFix.

It will make no animations play, but if your hardware is low-end then it should help with FPS.

Sorry, I can't find the previous version number, it seems to be downloaded from CF

Thanks for your help, it seems that no one else has found this problem, I plan to use other machines to test, I hope it is my PC

The problem has been found, caused by [Mipmap], the game default is 4, after changing to 0, the FPS problem has been resolved, however, I am still curious, this is never encountered in the previous version, the GPU used is AMD RX580 2048SP