It's only part of the puzzle, but I run speed benchmarks as part of
the continious build:
 http://ex.seabright.co.nz/helpers/buildlog
 http://ex.seabright.co.nz/helpers/benchcompare
 
http://ex.seabright.co.nz/build/gcc-linaro-4.5-2010.09-1/logs/armv7l-maverick-cbuild4-pavo4/pybench-test.txt

I've just modified this to build different variants as well.  ffmpeg
now builds as supplied (-O2 and others), with -Os, with hand-written
assembler turned off, and with -mfpu=neon.  corebench builds in -O2
and -Os.

This might be one way to approach things.  It's simple to add other
programs into the mix.

-- Michael

On Fri, Sep 17, 2010 at 4:05 AM, Dave Martin <dave.mar...@linaro.org> wrote:
> It would be interesting if we could get a good, representative set of
> comparative benchmarks for the size and performance impact of -Os.
>
> I did a bit of investigation here:
>
> https://wiki.linaro.org/Platform/Foundations/OptimiseForSize
>
> (though with just a few packages and only one benchmark, it's not very
> comprehensive)
>
> Cheers
> ---Dave
>
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> linaro-toolchain@lists.linaro.org
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>

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