Re: NSOperationQueue question
Re: NSOperationQueue question
- Subject: Re: NSOperationQueue question
- From: Quincey Morris <email@hidden>
- Date: Fri, 7 Aug 2009 13:33:07 -0700
On Aug 7, 2009, at 13:05, Tim Murison wrote:
In my real application I have a memory leak that I can trace to
operations
not being release by the operation queue. This program is meant to
show that
in the simplest way possible.
I really don't think it shows that at all. If your analysis is
correct, this code might show that you are able to outrun the
collector by 1MB/sec, but that's about all.
If you're trying to demonstrate a leak, you'll have to bring the
application (or at least the relevant section of code) back to a
quiescent state before analyzing the memory usage. What happens if you
stop creating operations after (say) 10 seconds? Is the questionable
10MB still in use a couple of seconds later, or did the memory usage
drop back down? If it's still in use, you might well be able to use
Instruments to find out what it is.
If you're trying to determine why there are so many threads, you're at
least going to have to classify (or count) threads according to their
status: waiting to execute, executing, finished executing. Large
numbers of waiting or finished threads may be nothing more sinister
than an artifact of your artificial test.
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