Re: [boost] BOOST_FOREACH slow?

Subject: Re: [boost] BOOST_FOREACH slow?
From: Hansi (hansipet_at_[hidden])
Date: 2008-11-17 13:47:59

hmm...you are right...it was optimized away...

sorry for the noise

Peter Bartlett schrieb:
> Rest easy Hansi, I think your test is invalid.
> 
> You write:
>> vector[TestData]: iterator:0.00167619
>> vector[TestData]: BOOST_FOREACH:9.40008
> 
> I too get this result I don't do anything with "res".
> If I add res to the lines that are printed to cout to stop the compiler 
> doing so much dead code elimination I get the following results:
> 
> vector[TestData]: iterator:32.1508
> vector[TestData]: BOOST_FOREACH:30.584
> 
> [I won't read too much into FOREACH being faster either... in my 
> experience the difference between iterators and FOREACH is lost in the 
> noise of things beyond your control in all but the most extreme cases.]
> 
> Pete
> 
> 
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