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What does a minus sign mean in the Leak Instrument?

I'm using Xcode's Instruments to find out if there's any leaks in my App. But I find the graph a little confusing. The app gets a cross when doing a certain job, but after that it gets minus signs only.

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The reference count seems to get zero finally. I'm not very sure about the reading.

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The official documentation is a bit outdated.

Solution

  • There's no explanation in the more recent Leaks instrument documentation about the snapshot icons.

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    By profiling code that leaks, here is a meaning for the leak indicators:

    • Green check (tick): No leak occurred in the snapshot interval (and no prior leaks exist).

    • Red x (cross): One or more leaks occurred in the snapshot interval.

    • Grey dash (minus): No new leak occurred in the current snapshot interval, but a leak from a prior snapshot still remains.

    If leaked object from the earlier snapshot was deallocated, you would have seen a green check instead of a grey dash.

    You can submit a documentation bug report to Apple requesting that an explanation be added to the documentation.