Felipe Contreras <[email protected]> writes: > On Fri, Dec 16, 2011 at 10:22 PM, Mans Rullgard <[email protected]> wrote: >> The A32 bitstream reader variant is only used on ARMv5 and for >> Prores due to the larger bit cache this decoder requires. >> >> In benchmarks on ARMv5 (Marvell Sheeva) with gcc 4.6, the only >> statistically significant difference between ALT and A32 is >> a 4% advantage for ALT in FLAC decoding. There is thus no (longer) >> any reason to keep the A32 reader from this point of view. >> >> This patch adds an option to the ALT reader increasing the bit >> cache to 32 bits as required by the Prores decoder. Benchmarking >> shows no significant change in speed on Intel i7. Again, the >> A32 reader fails to justify its existence. >> >> Signed-off-by: Mans Rullgard <[email protected]> > > Cool! I've often wondered what was the point of it.
It may have at some point been faster on some CPU with some compiler. We do not know. -- Måns Rullgård [email protected] _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
