libav IDCT speed tests
michael.hope at linaro.org
Tue Sep 20 04:08:57 UTC 2011
Måns pointed me at the IDCT throughput test that's included with
libav. I've written up a page on how to build and run it at:
Included are results with and without the vectoriser. In all cases
the vectoriser improves things, including increasing the SIMPLE-C
version by 11 % and the peak by 17 %.
The coefficient of variance is low so the results are consistent. I
haven't investigated the benchmark itself to see if its valid - we
could be vectorising the loop overhead instead of the IDCT itself.
More information about the linaro-toolchain