Re: crypto_scrypt-sse.c speedup

[Solar Designer <solar@openwall.com>]

On Fri, Nov 16, 2012 at 04:09:17AM +0400, Solar Designer wrote:
> I've tried compiling in two ways:
> 
> 1. -march=native -O2 -fomit-frame-pointer
> 2. -march=native -O2 -fomit-frame-pointer -funroll-loops -finline-functions
> 
> The 5% to 10% speedup on Intel is for #1.  With #2, I've just measured a
> speedup of 4% on the same E5649.

With Salsa20 rounds count reduced from 8 to 2, I am getting a speedup of
10% to 15% (varies between invocations) on the E5649 for both #1 and #2.

Alexander