b5aff00c89
This PR does a few things to help with performance:
1. Instead of doing changes on raf we now do them 60 times per second.
This limits the number of updates on high refresh rate screens like the
iPad. With the current code this only applied to the history updates (so
when you subscribed to the updates), but the next point takes this a bit
futher.
2. We now trigger react updates 60 times per second. This is a change in
`useValue` and `useStateTracking` hooks.
3. We now throttle the inputs (like the `pointerMove`) in state nodes.
This means we batch multiple inputs and only apply them at most 60 times
per second.
We had to adjust our own tests to pass after this change so I marked
this as major as it might require the users of the library to do the
same.
Few observations:
- The browser calls the raf callbacks when it can. If it gets
overwhelmed it will call them further and further apart. As things call
down it will start calling them more frequently again. You can clearly
see this in the drawing example. When fps gets to a certain level we
start to get fewer updates, then fps can recover a bit. This makes the
experience quite janky. The updates can be kinda ok one second (dropping
frames, but consistently) and then they can completely stop and you have
to let go of the mouse to make them happen again. With the new logic it
seems everything is a lot more consistent.
- We might look into variable refresh rates to prevent this overtaxing
of the browser. Like when we see that the times between our updates are
getting higher we could make the updates less frequent. If we then see
that they are happening more often we could ramp them back up. I had an
[experiment for this
here](
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tldraw
Welcome to the public monorepo for tldraw. tldraw is a library for creating infinite canvas experiences in React. It's the software behind the digital whiteboard tldraw.com.
- Read the docs and learn more at tldraw.dev.
- Learn about our license.
Installation
npm i tldraw
Usage
import { Tldraw } from 'tldraw'
import 'tldraw/tldraw.css'
export default function App() {
return (
<div style={{ position: 'fixed', inset: 0 }}>
<Tldraw />
</div>
)
}
Learn more at tldraw.dev.
Local development
The local development server will run our examples app. The basic example will show any changes you've made to the codebase.
To run the local development server, first clone this repo.
Install dependencies:
yarn
Start the local development server:
yarn dev
Open the example project at localhost:5420.
License
tldraw's source code and distributed packages are provided under the non-commercial tldraw license.
This license does not permit commercial use. If you wish to use tldraw in a commercial product or enterprise, you will need to purchase a commercial license. To obtain a commercial license, please contact us at sales@tldraw.com.
To learn more, see our license page.
Trademarks
The tldraw name and logo are trademarks of tldraw. Please see our trademark guidelines for info on acceptable usage.
Community
Have questions, comments or feedback? Join our discord or start a discussion.
Contribution
Please see our contributing guide. Found a bug? Please submit an issue.
Contributors
Star History
Contact
Find us on Twitter at @tldraw or email sales@tldraw.com. You can also join our discord for quick help and support.