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Message-ID: <CAKHv7phN-3SkKW12q7YRzUdzG94Dp8EQ=sZFS+8hFiZ5+c04yw@mail.gmail.com>
Date: Wed, 8 Apr 2015 22:59:19 +0200
From: Paul Schutte <sjpschutte@...il.com>
To: musl@...ts.openwall.com
Cc: John Mudd <johnbmudd@...il.com>
Subject: Re: musl perf, 20% slower than native build?
Hi Daniel,
Pardon my stupidity, but with what did you replace the memcpy ?
Regards
Paul
On Wed, Apr 8, 2015 at 9:28 PM, Daniel Cegiełka <daniel.cegielka@...il.com>
wrote:
> 2015-04-08 21:10 GMT+02:00 John Mudd <johnbmudd@...il.com>:
>
> > Here's output from perf record/report for libc. This looks consistent
> with
> > the 5% longer run time.
> >
> > native:
> > 2.20% python libc-2.19.so [.] __memcpy_ssse3
>
> >
> > musl:
> > 4.74% python libc.so [.] memcpy
>
> I was able to get twice speed-up (in my code) just by replacing memcpy
> in the musl.
>
> Daniel
>
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