Re: [Mingw-users] GCC 4.3.0 20080502 (alpha) Released - Please help us test it!

[Stéphane Larouche <stephane.larouche@xxxxxxxxxx>]

Aaron W. LaFramboise <aaron77thyme@...> writes:

> 
> The MinGW.org team is pleased to offer a binary release of GCC 4.3.0.
> 
> Warning: This is an alpha testing release.  That means the build may 
> contain major missing functionality and serious bugs, including silent 
> incorrect code compilation.
> 
> MinGW needs your help to test this compiler!  Please try out this 
> release and let us know what you think.  Contact information is below.
> 

Thank you for the good work!

I've compiled 2 DLLs for a project of mine with this new release and they
compile and run correctly. But they are extremely slow. What I mean is that
running a typical operation of my software takes approximately twice as much
time to run when the dll are compiled with GCC 4.3.0 alpha than when they are
compiled with GCC 3.4.5. While the 4.2.1 technology preview releases provided a
speedup of approximately 25%.

The DLLs contain a lot of mathematic functions (mainly trigonometric) and their
functions are relatively short but are called repeatedly from the main program
(written in Python).

Is this a known problem? Would it be helpful if I tried to identify what part of
the code are so slow? Do you have any suggestion of how to do it?

Sincerely,

Stéphane


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