[vlc-devel] Phosphor timing tests (reworked += 5)

Rémi Duraffort ivoire at videolan.org
Wed Mar 30 14:57:02 CEST 2011


> Timing the new version ("reworked += 5"), DarkenField() takes about
> 500us per call in 4:2:2 mode on my Atom. It used to take 750us, so the
> simpler MMX code is a significant improvement. It also makes the code a
> bit shorter and easier to read.
> The performance scaled surprisingly linearly: 12 instructions vs. 23 per
> loop produced a 100% speed increase in the 4:2:2 chroma handler. It
> seems it was CPU bound.

Only one word: congrats !
That's a good news so thanks for your work on that and keep up the good
work (I like when we have some benchmarks:))

My 2 cents

Rémi Duraffort | ivoire

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