Re: Xcode performance issues over time
Re: Xcode performance issues over time
- Subject: Re: Xcode performance issues over time
- From: Joar Wingfors <email@hidden>
- Date: Tue, 16 Feb 2010 22:24:45 -0800
On 16 feb 2010, at 18.56, Brian Zwahr wrote:
> Ok, I have taken some samples and filed a bug report: #7656265.
Thanks!
> One note about the samples: I would click "Sample Process", then command-tab to XCode to try to type or move the cursor while the sampling was taking place (per your suggestion), but it always seemed that the sampling would be done before XCode gained focus again (part of the slow-down issue). I still command-tabbed then starting pressing the arrow keys, even before XCode was fully focused, just in case it got caught by the sample.
Instruments and Shark are two dedicated performance tools that you also could have used to grab this CPU sample. Both of them provide global keyboard shortcuts that's very convenient to use for starting / stopping the sampling while you're working in some other app.
I wanted to ask you (and anyone else listening in on this tread) about something else though: From this thread it sounds to me that this is probably not a CPU-bound problem, but rather a problem with memory usage. Because of that, I'd like to ask you to provide some additional data with your bug reports:
* The output from the "heap" command like utility (type "heap Xcode" in Terminal, and attach the output)
* The output from the "top" command line utility (type "top -l 1" in Terminal, and attach the output)
* An "Object Graph" report from Instruments (Launch Instruments, Select the "GC Monitor" template, Attach to Xcode, Hit Record, Wait ~30 seconds, Hit Stop, and save the report)
* A rough description of your working set: How many open projects, windows and documents
If you could provide this information, that would be great. You need to grab these samples when Xcode is in the "bad" state, but you don't have to be working in Xcode while the samples are generated.
Thanks,
j o a r
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