The performance tweaks package includes numerous things to enhance performance. You can check out what each package does at it's upstream project.
See the list of dependencies:
ananicy-git
auto-cpufreq-git
haveged (haveged-git)
hdparm
irqbalance (irqbalance-git)
memavaild-git
nohang-git
prelockd-git
profile-sync-daemon
systemd-swap (systemd-swap-git)
thermald (thermald-git-gcc10, thermald-git)