flac dev - Jul 2014 - Performance checks

Hi all,

I thought it was a good idea to get an overview of the 
developments since the release of 1.3.0, so here are a few graphs.

The first was compiled with GCC 4.8, the second was compiled 
with MSVC 2013. Both were tested on a Kubuntu 14.04 machine, 
with an Intel Core 2 Duo T9600 (SSE support up to "version" 
4.1), the MSVC compiles were run through wine, as I don't think 
running in a virtual machine would give reproducible results. 
However, because of the use of Wine the MSVC results are not 
more than an indication.

http://www.audiograaf.nl/misc_stuff/FLAC-performance-test-Linux-GCC-4.8.pdf
http://www.audiograaf.nl/misc_stuff/FLAC-performance-test-Wine-MSVC-2013.pdf

For the GCC 4.8 results, there is a*very nice 60% to 70% speed 
increase* when encoding with preset -8 between FLAC 1.3.0 and 
current git.



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Martijn van Beurden wrote:
> For the GCC 4.8 results, there is a*very nice 60% to 70% speed
> increase* when encoding with preset -8 between FLAC 1.3.0 and
> current git.
Currently FLAc defaults to -msse2 which means that SSSE3 and SSE4.1
optimizations don't work with GCC < 4.9. SSE4.1 is useful only for
32-bit builds (*) and 24-bit input files, but SSSE3 should give
a few percent speed increase over SSE2.


(*) - according to my tests on Intel CPUs.

On Wed, Jul 02, 2014 at 10:18:58PM +0200, Martijn van Beurden
wrote:
> http://www.audiograaf.nl/misc_stuff/FLAC-performance-test-Linux-GCC-4.8.pdf
>
http://www.audiograaf.nl/misc_stuff/FLAC-performance-test-Wine-MSVC-2013.pdf
> 
> For the GCC 4.8 results, there is a*very nice 60% to 70% speed increase*
> when encoding with preset -8 between FLAC 1.3.0 and current git.
That's indeed a significant improvement. I'm assuming most of it is
from the SSE intrinsic code. Good job, lvqcl!

-- 
Miroslav Lichvar