From kde-core-devel  Mon Sep 13 02:57:18 2010
From: Michael Pyne <mpyne () purinchu ! net>
Date: Mon, 13 Sep 2010 02:57:18 +0000
To: kde-core-devel
Subject: Re: [PATCH] Cache returned KIconLoader pixmaps in 4.5.2
Message-Id: <20100913025721.3D07E88796 () postalmail-a6 ! g ! dreamhost ! com>
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On Monday, September 13, 2010 00:20:40 Matthias Fuchs wrote:
> Works really great now. I have a question though:
> 
> When running my small test program the icon gets cached and then reused,
> though if I run the test again -- i.e. start the program again -- it gets
> also cached again and then reused, but shouldn't it still be in the cache
> from running the program the first time?
> Or does the cache gets cleaned up very fast?

Define "cache". There are two:

1. A process-shared cache, but the catch is that the data must still be 
decoded from PNG (which is how both QImage and QPixmap stream it to storage).
2. A process-local pixmap cache. This essentially stores references to the 
QPixmap that had been read from cache 1 so that it is easy to refer to in the 
future. These pixmaps are already in either X server or GPU memory which is 
why they're much faster.

Cache 1 was always working. All this does is utilize Cache 2 in addition in a 
more sane matter. But since Cache 2 is process-local, every time the 
application exits, you should expect items in it to go away.

Regards,
 - Michael Pyne
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