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    Profiling with Instruments

    Instruments can be used for memory profiling and for statistical profiling.

    Official Apple documentation

    Command line tools

    There is instruments and iprofiler.

    How do we monitor performance counters (cache miss etc.)? Instruments has a "Counters" instrument that can do this.

    Memory profiling

    Instruments will record a call stack at each allocation point. The call tree view can be quite helpful here. Switch from "Statistics". This malloc profiling is done using the malloc_logger infrastructure (similar to MallocStackLogging). Currently this means you need to build with jemalloc disabled (ac_add_options --disable-jemalloc). You also need the fix to Bug 719427

    The DTPerformanceSession api can be used to control profiling from applications like the old CHUD API we use in Shark builds. Bug 667036

    System Trace might be useful.

    Document Tags and Contributors

    Last updated by: jrmuizel,