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Re: benchmarking - it's now all(-1,0,1,5,6)% faster

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January 11, 2003 19:42
Re: benchmarking - it's now all(-1,0,1,5,6)% faster
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Nicholas Clark <> wrote:
:So I'm confused. It looks like some bits of perl are incredibly sensitive to
:cache alignment, or something similar. And as a consequence, perlbench is
:reliably reporting wildly varying timings because of this, and because it
:only tries a few, very specific things. Does this mean that it's still useful?

I think I remember seeing a profiler that emulates the x86 instruction set,
and so can give theoretically exact timings. Does this ring a bell for
anyone? I don't know if the emulation extended to details such as RAM
and cache sizes ...


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