Re: [V4L] Webcam (V4L-V4L2)

[Benedict Bridgwater]

Justin Schoeman wrote: (regarding RGB/YUV conversion)
>
> I actually benchmarked these two versions a while ago, and it turns out
> that on a reasonably new PC (K6/PII or up), fixed point arithmetic is
> quite a bit faster than tables - It turns out that a fixed point
> multiply is a lot quicker than a memory access (especially when taking
> the heavy cache usage of image processing into account).  On older PCs
> (Pentium/K5/etc) the table version is quicker.

Justin, do you remember if this difference would show in a simple
conversion loop benchmark, or did it have to be in context of an actual
image conversion with corresponding cache usage?

Ben



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