TrafficMonitor CPU Optimization Postmortem: An Engineering Simplification from 4% to 0.6%

A postmortem on CPU optimization under a high-frequency polling workload: by shrinking the UI logging path, removing high-frequency state machines, and fixing the wait model, CPU usage dropped from 3.6%~4.2% to 0.1%~0.6%.

2026-04-26 · 5 min · 974 words · YUCHENG MING

Pitfall Log: Fixing Modbus Multithread Deadlocks

A field note on shutdown deadlocks and timeout misjudgment in a Qt multithreaded Modbus workflow, with practical fixes.

2026-03-07 · 2 min · 341 words · YUCHENG MING