Note to composers: This thread is about software development.
Check this out!
1. Save and unzip the attached JSON file.
2. Visit https://ui.perfetto.dev/ in a browser.
3. Click "Open trace file" and choose the JSON file.
4. Explore.
What you should see is a visualization of the activity
in service of this command:
lilypond -djob-count=2 -dtime-trace-file=z \
~/lilypond-src/input/regression/mozart-hrn-3.ly \
~/lilypond-src/input/regression/typography-demo.ly
I don't expect to have code ready for review this weekend,
but I wanted to share this much.