360 Tech Engineering
Feb 12, 2020 · Mobile Development
iOS Main Thread Lag Monitoring with RunLoop and QiLagMonitor
This article explains how to monitor iOS main‑thread lag using RunLoop observers and the QiLagMonitor tool, detailing RunLoop modes, observer activities, and providing Objective‑C code for creating semaphores, observers, and a background monitoring loop that captures stack traces when the main thread stalls.
Mobile DevelopmentPerformance MonitoringQiLagMonitor
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