But GCC likely isn't able to do that for libc functions like qsort(). Maybe if L... | Hacker News

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		cremno on Dec 26, 2014 \| parent \| context \| favorite \| on: Subtraction is not comparison But GCC likely isn't able to do that for libc functions like qsort(). Maybe if LTO is enabled and libc is linked statically, it might.

bluecalm on Dec 27, 2014 [–]

I have no idea when it can and when it can't do that to be honest. I tested qsort vs std::sort on my machine on my data and performance was the same (Windows, MinGW, GCC 4.8, -flto enabled) but other people reported different results.

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