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Optimizing compilers often have budgets so you can get different outcomes if performance jitter happens to mean that it bails from some optimization stratagies.
by UncleMeat 3y ago
Optimizing compilers often have budgets so you can get different outcomes if performance jitter happens to mean that it bails from some optimization stratagies.
- jcranmer 3y agoThe budgets I've seen have less been "if it's taken N seconds, bail" and more "if we've processed X million instructions, bail." At least in the compilers I work on, nondeterminism is considered a bug, although it can be harder to avoid nondeterminism than you'd think.