everyone knows about -funroll-loops and -funsafe-math-optimizations, but the real winner here is posix_fallocate
real Gentoo users compile with -O3 -funroll-all-loops --param max-unrolled-insns=1000000 --param max-average-unrolled-insns=999000 --param max-unroll-times=1000000 for maximum speedup.pic.twitter.com/joWKMjhriO
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pfft... REAL Gentoo users profile their workloads and use machine learning to optimize their compiler parameters
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(bonus points for object-dependent optimization parameters)
End of conversation
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*sob*
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I think the wasted time was underestimated.
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I guess they also buy CPUs without instruction caches. Because they’ll be useless anyway and a waste of silicon and power.
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