[flac-dev] FLAC__BYTES_PER_WORD==8 test results

Thomas Zander thomas.e.zander at googlemail.com
Tue Dec 29 12:21:32 PST 2015

On 29 December 2015 at 17:10, lvqcl <lvqcl.mail at gmail.com> wrote:
> I wrote a patch that enables FLAC__BYTES_PER_WORD==8 in
> libFLAC/bitreader.c and libFLAC\bitwriter.c.
> The tests were done on an Intel Nehalem CPU, and flac was compiled
> with CGG 4.9.x.

If you want to share the patch, I am happy to repeat some testing on
Sandy Bridge and Core2 with clang.

> Average speed increase for FLAC__BYTES_PER_WORD change from 4 to 8:
> [...]

The slower decoding speed for 24 bit content on x86_64 seems
surprising, but minor.
However losing 15% decoding speed on i386 would be very bad.


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