Re: 2.5X slowdown with g++ 3.4 (probably 3.3 also) over 3.2

[P Ruetz]

"P Ruetz" <parmailbox-news@yahoo.com> wrote in message 
news:9SzYe.1088$xc4.88@newssvr13.news.prodigy.com...
>I hope this issue has not been discussed before.  My search on this topic
> did not turn up anything pertinent.
>
> I have been compiling a computationally bound C++ program with MS Visual 
> C++
> and various GNU g++ versions for some time.
>
> Normally, g++ and MSVC produce similar run times with optimized code.
> However when moving from g++ 3.2 to 3.4 (and, I think, this also happened
> with 3.3 when I tried it some time ago), the run times increase about 
> 2.5x.
>

One more bit of info.  I just downloaded 3.3 (g++ (GCC) 3.3.3 (cygwin 
special)) and it does the same thing as 3.4 (2.5x run time of 3.2).

Thanks,
Peter