There is a large drop in FPS ( around ~50%) between 1.21.4 and 1.24.5 , through bisecting the majority of this drop seems to happen with the pre1 candidate (while there is some drop from 1.21.4 present in 25w10a it’s much less.
There was a large range of FPS possible (the slowest being ~half as much as the fastest, water in particular seems to cause a major drop ) depending on the direction looked and whether or not the player is moving, so best way to test this is on the same world looking in the same direction while stationary.
To test:
Vsync Disabled, Full Screen activated, resolution set to my Monitor resolution and refresh rate ( 4K@60Hz) , used F3 to compare the FPS
ETA - I use an NVidia card, Windows 11 , Intel x86_64 CPU
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unable to reporduce. Are you using some mods or shaders?
I think this is a more serious issue. I just compared the frame rates of 1.21.4 and 1.21.5, and it decreased by 50%
Not sure if this is relevant but like with Abys7835 my card is also an NVIIDA, thought it was worth mentionging.
Thank you for your report!
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Gah, Title versions should be 1.21.4 and 1.21.5 obviously.