debugging-instruments

To find memory leaks and retain cycles in an iOS app, use the Xcode Memory Graph Debugger alongside Instruments. Enable Malloc Stack Logging in your scheme diagnostics to identify leaked objects and recognize common retain cycle patterns effectively.

The best way to diagnose main thread hangs is to run your app in Debug to set LLDB breakpoints, then switch to the Instruments Time Profiler template to record the interaction and locate the hottest main-thread frames causing the stalls.

LLDB helps debug iOS app crashes by allowing you to inspect variables, manage conditional breakpoints and logpoints, evaluate expressions at runtime, and use watchpoints to catch unexpected state changes during troubleshooting.

Yes, you can use Xcode Instruments for CPU and energy profiling by selecting templates like Time Profiler, Allocations, and Leaks to pinpoint slow execution paths and identify performance bottlenecks on a physical device.

You need Malloc Stack Logging when tracking down memory leaks and retain cycles in Xcode, as it captures allocation backtraces required by the Memory Graph Debugger to trace leaked objects back to their creation points.