Iterator benchmark

[Sven Langkamp]

On Tue, Jun 9, 2009 at 1:40 PM, Kai-Uwe Behrmann <ku.b at gmx.de> wrote:

> > Date: Mon, 8 Jun 2009 22:46:32 +0200
> > From: Sven Langkamp <sven.langkamp at gmail.com>
>
> > I have commited a first version of the iterator benchmark we dicussed
> > yesterday. It basically iterates over a paint device without doing
> memcpys.
> > The results are as we expected:
> >
> > -HLine- and VLineIterator perform quite similar.
> > -the rect iterator about 10% faster than hline
> > -the random accesor is about 40% slower than hline
>
> Could you give some numbers of iterator access/modification in pixel per
> seconds for a non Krita developer.


The benchmark is pretty simple and you should be careful with the actual
numbers. The values change a bit with different system load.
It's just measure how long it takes an iterator to iterate over each pixel
paint device without doing a memcpy. Colorspace is RGB 8.

Running it on a Core Duo 2GHz  I get:

HLineIterator 12,5 MPixel/sec
RectIterator 15,3 MPixel/sec
RandomIterator 8 MPixel/sec

With doing a memcpy I get:

HLineIterator 5.8 MPixel/sec


I curious how that compares to other implementations.


>
> thanks in advance,
> Kai-Uwe Behrmann
> --
> developing for colour management
> www.behrmann.name + www.oyranos.org
>
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