Profiling silly video

[Lubos Lunak]

On Sunday 24 of August 2008, Harri Porten wrote:
> Anyone else did look for bottle necks already? I've put the screenshot of
> a KCachegrind run of my (debug) build at
> http://www.froglogic.com/~porten/profile.png

 Note that profiling non-optimized builds can be sometimes quite misleading 
and one may end up optimizing something that the compiler will already handle 
anyway.

> A low hanging fruite: I wondered how 9% can be made up by
> QString::sprintf() calls. Turned out that QColor::name() has a simple but
> inefficient implementation. Will report this to qt-bugs although I'm not
> sure how good the chances of an improved version are because our demand
> might be considered too special.

 You can put the patch in qt-copy/patches. Distributions pick up patches from 
there regularly.

-- 
Lubos Lunak
KDE developer
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