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CATiledLayer Memory Usage
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CATiledLayer Memory Usage

  • Subject: CATiledLayer Memory Usage
  • From: Milen Dzhumerov <email@hidden>
  • Date: Sat, 22 May 2010 17:44:07 +0100
Hi all,

I've been writing some code that uses CATiledLayer and noticed that the memory usage increased quite a bit - by a factor of 2, on average. Some numbers that I've collected:
Normally Sized Window
 - NS: 10mb; CA: 18.5mb
Maximized Window:
 - NS: 23mb; CA: 45.7mb

I tried playing with the tile size and it looks like it has no effect on the memory usage. If I just used a normal CALayer, the memory consumption was somewhere in-between - an increase of about 1.5 with respect to the NS version. I just wanted to ask whether that's the expected behavior of CATiledLayer and whether I should be following any tips to keep that usage down as much as possible.

Many thanks,
Milen

PS. Test project http://dl.dropbox.com/u/645995/TiledLayerMemoryUsage.zip_______________________________________________

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