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Date: Mon, 4 Oct 2004 12:18:47 -0700
Reply-To: sterling@apache.org
To: Ilia Alshanetsky <ilia@prohost.org>
Cc: Sebastian Bergmann <sb@sebastian-bergmann.de>, internals@lists.php.net
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Subject: Re: [PHP-DEV] GCC/CFLAGS Benchmark for HEAD and PHP_5_0
From: sterling.hughes@gmail.com (Sterling Hughes)

On Mon, 04 Oct 2004 15:05:04 -0400, Ilia Alshanetsky <ilia@prohost.org> wrote:
> Very interesting numbers, I'd like to second Marcus' request for a 4.3
> benchmark.
> 
> I was somewhat surprised by O2 and O1 being slower then Os, while O3 in
> some cases may end over optimizing which would it explain it's poor
> showing. However, it could be that it makes simple situations slower,
> while more complex operations that are generally more CPU intensive will
> in fact become faster. If you don't mind, could you please all include
> data for "time make test" as it seems to cover a much greater quantity
> of code.
> 
Thies and I found the same thing when we did our patch.  It relates to
the size of the executor loop that is generated, if you have too much
inlining you end up blowing your instruction cache.

-Sterling