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by roeles 454 days ago
> And in some/most cases -Os is faster than -O3 This surprises me. Can you please elaborate?
2 comments
rurban 453 days ago
A IC cache miss costs 50x more on average. If your insn and data are small, the overhead of doing more work is less than the overhead of cache misses
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withinboredom 453 days ago
If the whole program can fit in the L1/L2 cache, it can speed up things quite a lot!
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