On Jun 1, 2008, at 5:03 , Stéphane Droux wrote:
I've changed the timer function to do random animations and this time itreally "leaks":- (void) fromTimer: (NSTimer *) t {l2.frame = CGRectMake((double)random() / RAND_MAX*30, (double)random() /RAND_MAX*30, (double)random() / RAND_MAX*40, (double)random() / RAND_MAX*40); l1.opacity = (double)random() / RAND_MAX; }I ran it in Object alloc and can see a trend of increasing memory usage : the memory usage keeps changing up and down but the general trend is up andit doubled after a minute or so. Could that be caused by some kind of caching in Core Animation ? If it is, is there a way to flush the cache ?
Even with this new code I'm still not observing any leaking. Are you using garbage collection? With GC enabled you will observe fluctuations until the collector gets a chance to free up unused memory, but even then after a few minutes or so the usage level should periodically return to a reduced level.
I am not privy to the caching Core Animation is doing internally, but also keep in mind that it maintains both presentation and model layers behind the scenes, in addition to whatever internal caching might be happening to improve performance.
What kind of hardware are you running? I suspect we may be seeing some differences in our results based on that (perhaps different graphics hardware is causing Core Animation to have to do more - or different - work on your machine). I still don't see why this would be leaking on your machine though.
/brian
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