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This article explains how WeChat’s iOS team built a run‑loop based lag‑monitoring system, describes the causes of main‑thread blockage, the annealing algorithm, time‑consuming stack extraction, crash‑lag detection, and presents performance data showing only a few percent overhead.
The article describes the background, architecture, and implementation details of a non‑intrusive Android SDK that monitors UI‑thread stalls, collects performance data, aggregates it on the server, and automatically generates work orders to help developers pinpoint and resolve lag issues efficiently.
This article describes the design and implementation of a non‑intrusive Android SDK that monitors main‑thread UI lag by replacing the Looper printer, sampling stack traces, aggregating data on the server, and automatically generating work orders for precise performance optimization.
This article explains the causes of UI stutters on iOS, outlines a thread‑stack‑dump monitoring approach, describes detection thresholds, classification methods, sampling strategies, and shares the practical results of deploying the solution in WeChat.