Try using Instruments.app and it's ObjectAlloc tool to see what is
slowly taking up memory. By watching the allocations over a few
minutes it should be easy to see what is leaking.
It'll usually appear to be a lower-level object (NSString,
CFDictionary etc) but by using Outline View and the Extended Detail
View and selecting the object at fault you can see the heaviest stack
trace of calls that lead up to it, some of which will pass through
Quartz Composer internals (or perhaps via a plugin you're using),
giving a clue as to which patch is taking up memory.
We had a similar memory leak with the built in movie loader that was
more dramatic - hundreds of megabytes within half an hour - and we
managed to find a work around using the above technique.
Caveat lector: there may be beter ways of doing this. A Jedi Cocoa
developer may give better advice.
Ade.
On 12 Jul 2009, at 02:36, Adrian Lo <[email protected]> wrote:
Hello,
There's something that I had noticed in regards to the memory usage
of Quartz Composer. I've got this composition that reads in a XML
file (the XML Downloader patch) and 3 images (via the Image
Downloader patch). This loops every 8 seconds or so. After leaving
it to run for around 10 hours, I noticed that the memory usage has
gone from 30mb+ to 185mb now.
Is there some sort of memory leak issues to watch out for when using
some patches? The files downloaded are pretty small still. The XML
file is just around 380bytes in size, and the images are around 3.5k/
b or so in size.
Would really appreciate some feedback on this, and thanks in advance.
Regards,
Adrian
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