Subject: Re: [boost] [string] Yet another Unicode string class
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2011-02-15 08:05:49
On 15/02/2011 13:35, Jeff Flinn wrote:
> 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.
I don't think copying 3 words is really the area where SIMD shines the most.
But it does shine (with linear speedups) in others.