Re: Newbie thread question
Re: Newbie thread question
- Subject: Re: Newbie thread question
- From: David Dunham <email@hidden>
- Date: Tue, 18 Aug 2009 07:50:10 -0700
On 17 Aug 2009, at 12:51, McLaughlin, Michael P. wrote:
Could someone tell me the best Performance Tool to use to analyze
statistics
for separate threads in an NSOperationQueue-type app? I am
wondering why my
app *slows down* with 2 CPUs compared to 1 :-(
I recall someone writing a blog post which pretty much answers your
question, about a month ago. Can't remember more than that.
A lot of the time you can just break into the debugger a lot -- if
it's a synchronization issue (like Alastair suggests) you can often
see patterns in the stack.
I assume you're not doing stuff that has to be on the main thread,
which would create a bottleneck.
David Dunham
Mobile: +1 206 769 2227 http://www.pensee.com/dunham/
Imagination is more important than knowledge. -- Albert Einstein
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