util: use faster zlib's CRC32 implementaion
zlib provides a faster slice-by-4 CRC32 implementation than the
traditional single byte lookup one used by mesa. As most supported
platforms now link zlib unconditionally, we can easily use it.
Improvement for a 1MB buffer (avg MB/s, n=100, zlib 1.2.8):
i5-6600K C2D E4500
mesa zlib mesa zlib
443 1443 225% +/- 2.1% 403 1175 191% +/- 0.9%
It has been verified the calculation results stay the same after this
change.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
1 file changed