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I was trying to open instruments in xcode 4 but was not able to find a way to do it. Usually in Xcode 3, we would do run -> run with performance tool... but I dont really find any such thing to do it in xcode 4.. would anyone be able to tell me how to do this?
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Instruments is a powerful performance analysis and testing tool that's part of Xcode toolset. Instruments can help you profile your apps on all platforms - iOS, macOS, watchOS, tvOS - in order to better understand and optimize their behavior and performance.
Press Command-I in Xcode, select Allocations from the list and press Choose. After a moment, you'll see the Allocations instrument. It should look familiar because it looks a lot like Time Profiler. Click the record button in the top-left corner to run the app.
Xcode Instruments is best described as a powerful and flexible performance-analysis and testing tool. It's part of the Xcode toolset which also includes tools like Create ML and the Accessibility Inspector. The instruments can be used to: Track down problems in your source code.
"Instruments" is an application provided by Apple that provides a graphical user interface for the DTrace command-line tool. DTrace is a troubleshooting tool available on several Unix-like operating systems, including Mac OS X. It can log and provide statistics for many application and kernel-level operations.
If you want to use Instruments with your product:
Product -> Profile
This brings up a dialog where you can choose Leaks, Allocations, etc.
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Cmd-I also works to invoke Profile.
By default Profile is set up to use the Release build. If you want it to use Debug then pull down the platform dropdown, select "Edit Scheme", go to the "Profile" side-tab, and tell it to use Debug instead of Release.
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Product -> Perform Action -> Profile Without Building This should spawn a dialog to choose the good old known Instrument's templates from.
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