Tencent Cloud Developer
Apr 2, 2018 · Frontend Development
Analyzing UI Lag in a PC Client Using Windows Performance Toolkit and UIforETW
The article walks through diagnosing a noticeable UI lag in a PC client’s dial‑pad by capturing ETW traces with Windows Performance Toolkit and UIforETW, revealing that a costly LoadKeyboardLayout call during input‑method switching caused a 0.5‑second delay, and resolves it by filtering the keyboard‑layout state.
DebuggingETWUI performance
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