PGO, HashMaps and build inputs

[Holger Levsen]

hi kp,

On Tue, Sep 15, 2026 at 06:34:29AM +0200, kpcyrd wrote:
> following up on an IRC discussion about PGO profiling on the build server
> causing undeterministic binaries, I made a simple repository to demo this -
> there's other ways to achieve the same effect (like race-y readiness of e.g.
> file descriptors due to disk speed, causing different code branches to be
> taken).
> 
> https://github.com/kpcyrd/pgo-hashmap-unreproducible
[...]

thanks a lot for this insightful writeup! I believe this just some little 
bit of polishing/rewriting and then we could include this on 
https://reproducible-builds.org/docs/ (as a seperate page), what do you think?


-- 
cheers,
	Holger

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year being the worst year ever? (Peter Manseau)
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