Re: [boost] BOOST_FOREACH slow?

Subject: Re: [boost] BOOST_FOREACH slow?
From: Hansi (hansipet_at_[hidden])
Date: 2008-11-18 01:59:53

regarding to the benchmark link posted from Michael Marcin BOOST_FOREACH 
is 3 times slower then other equivalents...it is a lot...

Best regards
Hansjörg

Eric Niebler schrieb:
> Mathias Gaunard wrote:
>> Eric Niebler wrote:
>>
>>> During FOEACH's review, extensive performance tests showed FOREACH 
>>> was only about 5% slower than the hand-coded equivalent on average.
>>
>> Why not make FOREACH as fast as hand-coded equivalents when it is 
>> possible?
>> With decltype, typeof, or the MSVC hack it shouldn't be a problem. 
>> Also some compilers have native support for foreach-like loops.
> 
> I haven't spent a lot of time thinking about it, but I imagine making 
> this transparent to users would be hard. BOOST_FOREACH has documented 
> customization points that any alternate implementation should respect.
>