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Re: GCC 4.0.0 Performance Regressions?
Jason Bucata <jbucata@tulsaconnect.com> wrote:
>> You should try and isolate a single BYTEmark test which shows the
>> biggest regression. It's better if you manage to pack the whole test
>> as a single preprocessed source file. Theoretically, this file
>> should be compilable and linkable, and the resulting binary should
>> run for a while doing computations.
>>
>> With this kind of help, we can analyze the regression and see why
>> it's slower with 4.0.0.
>
> It was rather time-consuming but I managed to do it. I picked the
> numsort benchmark which had a serious regression:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21485
Many, many thanks!
Giovanni Bajo