VSYNC not working on macOS
Open
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bug
shell/mac
- Dominant language
- Rust
- Stars
- 9.7k
- Forks
- 565
- PR merge metrics
- No merged PRs in 30d
Description
I observed an abnormal CPU usage when using the `AnimFrame` mechanism.
Then I run the `druid-shell` `perftest` example and I got:
- Initial window size: Period of 2-3 ms, 56% CPU
- Maximized: Period of 10-12 ms, 141% CPU
I would expect something closer to 16ms for a refresh rate of 60Hz.
My computer is a MacBook Pro 15" from 2018 with Mojave (10.14.6)
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First steps
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- Open a pull request that references the issue number.
Research direction
Run the druid-shell perftest example on macOS and trace the AnimFrame mechanism and its VSYNC scheduling. Compare the observed 2–12 ms periods and CPU usage with the expected roughly 16 ms refresh interval; done means the animation is synchronized near 60 Hz without abnormal CPU usage.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- macos, rust
- Domain
- desktop, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100