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A longstanding performance effecting bug was fixed in the recently released 1.21.5 and the difference is night and day at least for vanilla clients.

This one: https://bugs.mojang.com/browse/MC/issues/MC-170134

I now never see below 60 fps when for all my years of playing this bug would bring down my FPS to the teens or 0 all the time no matter what hardware.




> A longstanding performance effecting bug was fixed in the recently released 1.21.5

Good to know that they're finally considering performance fixes but obviously involves moving to 1.21.5 and until there's mods to disable the bits I don't like, I'll be sticking with 1.20+mods.




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