Re: [boost] performance of a linear algebra/matrix library

Subject: Re: [boost] performance of a linear algebra/matrix library
From: Marius Stoica (letto2_at_[hidden])
Date: 2010-05-07 10:57:45

On Friday 07 May 2010 16:06:41 DE wrote:
> on 06.05.2010 at 22:48
> 
>  Kenny Riddile wrote :
> > If you mean a language-imposed, inherent abstraction penalty, then I
> > doubt it (certainly not 33%).  You can find out for yourself though:
> > 
> > http://www.stepanovpapers.com/AbstractionPenaltyBenchmark.cpp
> 
> i've run the code for my everyday compiler (msvc80) and it greported
> no abstraction penalty
> 
> i've also tried icc11 and it showed minor abstraction penalty
> (mean = 1.17)

i'm trying gcc 4.4.3 here

(optimization/total/penalty )

O0/ 32.15 /5.29
O1/ 1.02 /0.39
O2/ 0.86 /0.94
O3/ 1.09 /0.39
Os/ 0.96 /0.44

Do i understand that rigth or does gcc produce better code when you abstract 
away ?