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I just yesterday and the day before made some benchmark tests for a
comparison between ext4 and zfs. I ran repeated builds of a large
software package and it always came out to 45s. Now today I ran the same
test a few times and it was always 60s. I noticed that today an update
ran and that kernel 5.19.0-32 was installed. So just now I booted back
to 5.15.0-60-generic:amd64 and ran the test again: back to 45s.
I am running Ubuntu 22.04.1 LTS on a AMD Ryzen 3970X with 128GB RAM
otherwise there is nothing very special going on. I ran the tests on ZFS
and ext4, it makes no difference.
To reproduce, I would think that compiling any decent sized software
package one on 5.15 and then on 5.19 whould yield the same results.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: bot-comment
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Kernel linux-image-5.19.0-32 regression, compile speed down by 33%
https://bugs.launchpad.net/bugs/2007717
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