[flac-dev] Performance checks

[lvqcl]

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.