Hi. I have a problem because after the recent Minecraft: Java Edition uptade to 1.21.5 version my performance went down. Before 1.21.5 I had been using Iris&Sodium for shaders (for example BSL shaders) and I had a very good performance (100+ fps with shaders). Now, on the latest version, my fps (and others) went down and are around 30-60 with the same shaders that I used to play with on 1.21.4. This problem does not occur while playing with shaders, but on vanilla too. I will be very grateful if you reply to this message and also help other people with this problem. (I have a good end PC)
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Can you share more information on when this problem occurs. Also are you using mods or resource packs?
Thank you for your report!
We're tracking this issue in https://report.bugs.mojang.com/servicedesk/customer/portal/2/MC-295893 , so this ticket is being resolved and linked as a duplicate.
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i also noticed frame drops after the update