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Re: 100x perfomance regression between gcc 3.4.5 and gcc 4.X


On 3/12/06, Ernest L. Williams Jr. <ernesto@ornl.gov> wrote:
> > In any case: memcpy/memset inlining is broken in current GCC at least
> > on athlon arch.

let's say it changed.  Also memcpy/memset "inlining" is not regular inlining
but driven by completely different heuristics.

> Yes, why is the benchmark not valid?
> Then we would appreciate if the developers could recommend a valid test.

What is the benchmark supposed to measure?

Richard.


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