Polyline performance
- Dominant language
- JavaScript
- Stars
- 15.7k
- Forks
- 3.9k
- Avg merge
- 4d 6h
- Merged PRs (30d)
- 34
Description
After creating lots of polylines, it seems a lot of time is spent each render in PolylineCollection.update -> createCommandLists, even though nothing changes.
Easy to reproduce by running this gist in sandcastle: https://gist.github.com/YousefED/092aa2e48ca8ac4518b5b5c39e1c1682
Wait for everything to load, then open Chrome inspector, and run the profiler:
Contributor guide
Research direction
Start with PolylineCollection.update and its createCommandLists call, then reproduce the issue using the linked Sandcastle gist. Profile the render loop in Chrome after everything loads and compare the time spent when the polylines are unchanged; done means avoiding the reported repeated cost without changing rendering behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- computer-graphics, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100