Date: Thu, 11 Jul 2013 08:34:03 +1200 From: Andre Renaud <andre@...ewatersys.com> To: musl@...ts.openwall.com Subject: Re: Thinking about release >> What also might be worth testing is whether GCC can compete if you >> just give it a naive loop (not the fancy pseudo-vectorized stuff >> currently in musl) and good CFLAGS. I know on x86 I was able to beat >> the fanciest asm strlen I could come up with simply by writing the >> naive loop in C and unrolling it a lot. > > > Duff's device! That was exactly my first idea too, but interestingly it turns out not to have really added any performance improvement. Looking at the assembler, with -O3, gcc does a pretty good job of unrolling as it is. Regards, Andre
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