Performance and debugging
Diagnosing hangs
Users report that a certain screen occasionally freezes for about a second, but you can't reproduce it in development. How do you narrow down the cause?
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Performance and debuggingShort answerBasics
Reviews of your shipped iOS app say it occasionally stops responding to touch for a few s…
#hang #main-thread #metrickit
Performance and debuggingMultiple choiceExpert
Which of these can an app actually receive through MetricKit (MXMetricManager)? Select al…
#hang #metrickit
Performance and debuggingShort answerAdvanced
You want to add a feature to your in-house APM that captures a stack whenever the main th…
#hang #main-thread
Performance and debuggingMultiple choiceAdvanced
After a certain action the app freezes completely (no input response). Which of these are…
#hang #main-thread