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pabs3
on Nov 12, 2020
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Exploring PGO for the Rust Compiler
Does PGO mean the build products are non-deterministic? ie if you build the Rust compiler twice you get different bits.
connicpu
on Nov 12, 2020
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It would be deterministic for a given set of input profile data, but would likely change every time you instrumented a new profile
mlindner
on Nov 12, 2020
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That assumes any random number generator that a branch is based off of in the code flow was also deterministic, which is unlikely.
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