When there is a renderer/litemat enabled, it causes huge spam in the log/console and because of this in the log>last folder is clogged up to not real numbers. Tonight that number reached 1GB and through that amount Minecraft started to lag VERY badly, every 10-15sec started to freeze to 0fps.
Prior to this on past versions I found that it was through incompatibility mods but the specific mod I did not find so most likely all the problem in another.
It spams this: “OpenGL debug message: id=1282, source=API, type=ERROR, severity=HIGH, message='Error has been generated. GL error GL_INVALID_OPERATION in (null): (ID: 173538523) Generic error'”
latest.log

I would be very happy if you find out or find the reason for this spam