posit-dev / posit-dev/shinylive
Maximum message rate seems to be low
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- Dominant language
- TypeScript
- Stars
- 251
- Forks
- 25
- Avg merge
- 19m
- Merged PRs (30d)
- 2
Description
I was testing a new slider component in Shiny for Python and in Shinylive, and I found that I seem to be hitting a limit on how quickly messages can be sent to and from the "server" in Shinylive.
This is a slider with debouncing disabled. My mouse is sending events at (I think) 60Hz. With regular Shiny (not Shinylive), the response is instantaneous:
https://github.com/rstudio/shinylive/assets/86978/60cf4235-4745-4cae-aa78-d183cbec6b67
However, on Shinylive, it seems to hit a limit, and the slider seems to be updating at a slower speed than the mouse events, maybe 30Hz.
https://github.com/rstudio/shinylive/assets/86978/208d5ca7-6379-4212-b8a6-3e86e6966b99
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First steps
- Read the whole issue, then the project's contributing guide.
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Research direction
Reproduce the slider test in Shinylive with debouncing disabled and compare it with regular Shiny, using the linked recordings as the behavioral reference. Trace the browser-to-server message path and measure its rate; done means identifying why Shinylive updates around 30Hz instead of keeping up with the reported 60Hz mouse events.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python, typescript
- Domain
- networking, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100