[x264-devel] [PATCH 2/3] RFC: checkasm: Warn if a better SIMD function is slower than the simpler one

[Henrik Gramner]

On Thu, Aug 13, 2015 at 11:26 PM, Martin Storsjö <martin at martin.st> wrote:
> Yeah, I guess so. With some amount of margin it might be more useful though
> (e.g. N * nop?). Even though it's prone to false positives, it can also be a
> useful hint to investigate things - at least for arm I found a few surprises
> where the C versions were faster than the asm ones. I guess it shouldn't be
> enabled by default at least.

I'm OK with it if it's disabled by default and has a reasonable
threshold for triggering.