ever sense 1.19 released I've had issues with memory leaks, and its not exclusive to 1.19 either. its a problem from 1.14 to 1.19 (the allocated ram was at the default 2gb)

and I know the hardware I play minecraft on isn't particularly good but the game has run fine as long has I had a mod like optifine installed the game ran fine and 1.15 to 1.17 ran fine without mods due to all the bug fixing and optimizations in 1.15, but this memory leak causes the game to run at ~10fps even with mods like sodium and lithium (all tested versions were unmodified vanilla MC)