The CPU Usage Analyzer for Device Creation

on YouTube ↗23m

" summary

Qt Creator’s CPU Usage Analyzer uses the Linux perf sampling tool to stream traces from device to host, unwind stacks with DWARF, and show a zoomable timeline plus upcoming statistics view; it targets Boot2Qt 5.5 and Qt Creator 3.4/3.6 and runs on Linux only (commercial Qt Creator required). Live demo finds a hotspot where a QColor ctor consumes 43% time in drawColorProfile, then replacing it with qRed/qGreen/qBlue cuts runtime from 3.1s → 2.5s.

AI-written summary · about

" chapters (6)

1. 0:00Introduction to CPU profiler
2. 1:51What is perf profile
3. 7:34Live demonstration begins
4. 10:14Analyzing the profile
5. 12:53Optimizing draw color profile
6. 19:29Q&A session starts

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