For about 5 to 20% more performance/efficiency in systems newer than ~8 years old, especially for those affected by recent mitigations, you can use these v3 repositories.
This guide is by all means unofficial and incomplete, but enough packages can be replaced to make a difference.
What do they contain:
- CachyOS - Optimized kernel called linux-cachyos, and builds of some programs like LibreWolf, Wine, FileZilla etc.
- ALHP - An almost complete replacement of Arch's extra. Has libsystemd components so it requires artix-archlinux-support.
To ease the process I won't bother you with mirrorlists since I don't use them either, so just 2 servers per each will probably suffice, with the cdn mirror first to ensure reliability.
Installation:
1. If you want to use ALHP add their key (or install alhp-keyring from AUR):
# pacman-key --recv-keys E3D0D2CD3952E298 --keyserver keyserver.ubuntu.com; pacman-key --lsign-key E3D0D2CD3952E298
2. If you want to use CachyOS add their key...
# pacman-key --recv-keys F3B607488DB35A47 --keyserver keyserver.ubuntu.com; pacman-key --lsign-key F3B607488DB35A47
...and add this to the Architecture line in /etc/pacman.conf:
3. Add their repositories:
#
# REPOSITORIES
#
[system]
Include = /etc/pacman.d/mirrorlist
[world]
Include = /etc/pacman.d/mirrorlist
[galaxy]
Include = /etc/pacman.d/mirrorlist
[cachyos-v3]
Server = https://mirror.cachyos.org/repo/$arch_v3/$repo
Server = https://aur.cachyos.org/repo/$arch_v3/$repo
[extra-x86-64-v3]
Server = https://alhp.krautflare.de/$repo/os/$arch
Server = https://alhp.dev/$repo/os/$arch
[extra]
Include = /etc/pacman.d/mirrorlist-arch
*Info: For safety's sake they are place below Galaxy in this example. You can try to add them above at your own risk, for more replaced packages at the cost of maybe a few small conflicts down the line.
If you're more adventurous, cachyos-v3 can be added even further towards the top (as it's a smaller repo without libsystemd stuff), it replaces some more potentially useful pkgs. depending on your usage.
Upgrade, reboot and that's it. Stability has been fine for me, for the past year or so already, so I can recommend this. :-)