Proto for Boost mailing list page: Re: [proto] proto performance

Subject: Re: [proto] proto performance
From: Karsten Ahnert (karsten.ahnert_at_[hidden])
Date: 2011-02-20 05:55:53

On 02/20/2011 11:57 AM, Eric Niebler wrote:
> On 2/20/2011 5:52 PM, Joel Falcou wrote:
>> 1/ how do you measure performances ? Anything which is not the median of
>> 1-5K runs is meaningless.
> 
> You can see how he measures it in the code he posted.
> 
>> 2/ Don't use context, transform are usually better optimized by compilers
> 
> That really shouldn't matter.
> 
>> 3/ are you using gcc on a 64 bits system ? On this configuration a gcc
>> bug prevent proto to be inlined.
> 
> Naive question: are you actually compiling with optimizations on? -O3
> -DNDEBUG? And are you sure the compiler isn't lifting the whole thing
> out of the loop, since the computation is the same with each iteration?

It gcc 4.4 on a 64bit machine. Of course, I compile with -O3.

> 
> 
> 
> 
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