# Performance slowdown on AMD with Windows10 compared to Intel with Linux (arch)

**URL:** <https://discourse.julialang.org/t/performance-slowdown-on-amd-with-windows10-compared-to-intel-with-linux-arch/82180>\
**Category:** Performance\
**Tags:** performance, operating-system, matrices\
**Created:** [June 3, 2022, 10:48am UTC](https://discourse.julialang.org/t/performance-slowdown-on-amd-with-windows10-compared-to-intel-with-linux-arch/82180 "2022-06-03T10:48:55Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Sukera](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@Sukera](https://discourse.julialang.org/u/Sukera)\
**Post date:** [June 3, 2022, 1:58pm UTC](https://discourse.julialang.org/t/performance-slowdown-on-amd-with-windows10-compared-to-intel-with-linux-arch/82180/2 "2022-06-03T13:58:44Z")

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I can’t tell you the answer to why you see such a stark timing difference - it’s hard to say without a [MWE](https://discourse.julialang.org/t/topic/14757/1) or access to e.g. `@code_native` output on those machines.

> [@Tambu](#):
>
> Side question for arch users: why is julia installed from pacman much faster than the “julia-bin” package on the AUR?

That definitely shouldn’t be the case - usually, the `pacman` install makes problems, due to the arch repo having [had](https://discourse.julialang.org/t/package-used-to-work-after-update-to-1-6-it-doesnt-anymore/58920/14) [numerous](https://github.com/JuliaLang/julia/issues/43682) [issues](https://discourse.julialang.org/t/julia-llvm-issue/5954) in the past, mostly related to just using system LLVM, while julia requires certain patches that just take a while to be upstreamed…

If you have a reproducible example, I’d like to try that - I’m on arch as well, but I usually compile from source due to making PRs and the like. In my experience, AUR or self compiled has been consistently faster (not by a lot though).

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