Adding CachyOS Repository for Enhanced Arch Linux Performance

Why does CachyOS utilize its own repositories?

Performance and optimizations

We want to provide a performance-optimized distro and this requires performance-optimized packages. So that’s why CachyOS provides its own repositories with packages compiled with the following:

• x86-64-v4
• x86-64-v3 - 10%-20% performance uplift
• x86-64 - These packages have minimal benefits, only LTO provides a 5-10% uplift

Better control of the packages

Arch Linux repositories are great, but sometimes they are slow to react on required re-builds.

• Example: Typical errors like “error while loading shared libraries: /usr/lib/…”
• Solution: That error is mostly solved by a re-build of the package against a newer library and after the re-build the package works again.

Tests and benchmarks

If you would like to know more about the performance uplift of our repositories, check the links below.

• Phoronix has benchmarked Cachy twice and it seems to be mostly good for CachyOS, which is shown leading in the performance aspect. These benchmarks are a little bit older, during that time, CachyOS has already evolved much more:
  https://www.phoronix.com/review/cachyos-linux-perf These benchmarks are quite recent. Showing the further improvements made to CachyOS: https://www.phoronix.com/review/cachyos-x86-64-v3-v4

• x86-64-v3 (- there is a moderate benefit of -march=haswell (x86_64-v3) - of around 10%-20% as compared to baseline for the tests performed):
  https://lists.archlinux.org/pipermail/arch-general/2021-March/048739.html