Scalability of CALayers
Scalability of CALayers
- Subject: Scalability of CALayers
- From: Graham Cox <email@hidden>
- Date: Fri, 26 Oct 2012 11:18:58 +1100
I'm wondering how scalable the Core Animation layer model is.
When a region of a layer-backed view is updated, does the CA system have a way to quickly identify layers for update, e.g. some sort of spatial hash, or does it simply traverse the whole tree looking for intersections? If the latter I would expect that not to scale so well to thousands of layers.
Some sort of indication about this would be a key decision point about whether to base a substantial update of DrawKit on CALayer or whether to stick to "rolling my own". There are lots of compelling advantages to CALayer, but scalability is vital.
--Graham
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