Boost logo

Boost :

Subject: Re: [boost] [string] Yet another Unicode string class
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2011-02-15 07:53:46

> This caught my eye. A couple of years ago I looked at MMX/SIMD - tested
> an example off of the codeguru website which out of the box showed
> MMX/SIMD was faster. I unrolled the loop of the non-MMX/SIMD code using
> duff's device and saw no difference in performance with or without
> MMX/SIMD. I'm just wondering in your experience is there a real benefit
> of MMX/SIMD even discounting the alignment issue.

MMX is old tech. SSE2+ and Altivec has a real effect on such operations.

Boost list run by bdawes at, gregod at, cpdaniel at, john at