https://developer.apple.com/library/ios/documentation/DeveloperTools/Conceptual/InstrumentsUserGuide/InstrumentsUserGuide.pdf"rel=“noretinger”>。
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The Detail pane (while it is in Table mode) displays other useful information to help you spot potential allocation issues. The net versus overall allocations column of the table shows a histogram of the currently active objects and the total number that were ever created. As the ratio of net allocations to overall allocations
shrinks, the color of the histogrambar changes. Blue histogrambars represent a reasonable ratio while colors shifted towards the red spectrum represent lower ratios that might warrant some investigation
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The Leaks instrument examines a process’s heap for leaked memory. You can use this instrument together with the Allocations instrument to get memory address histories. This instrument requires that you launch a single process so that it can gather data from the start of the process.
This instrument captures the following information:
- The number of leaks
- The size of each leak
- Address of the leaked block
- Type of the leaked object
Each view mode in the Detail pane shows the leak data in a slightly different way. In table mode, this instrument shows the individual leaks along with the percentage that each individual leak contributes to the total amount of leaked memory discovered. In outline mode, the data is reorganized so that you can see how much memory is leaked from within a given symbol. For entries in eith
