Did you test with different kernels? Them using a custom scheduler that prioritizes desktop applications might cause background things to run slower.
Plus, the use of ananicy (cpu/ram limiter) limits stuff like that as well.
I use cachyos because they set up zram, anf uksmd by defualt. That’s ram compression and deduplication, and it’a pretty powerful in my experience. If you’re using cachyos, then uksmdstats and zramctl can give you an idea of how much you are saving.