Use OffScreenCanvas API for big data live charts

### One-line summary [问题简述]
I am creating an application which shows years of historic data and also keeps plotting new live data from a web socket connection, I am facing real performance issues and UI thread goes blocking, I have been searching on it and I think the solution is this. **Make use of** [OffScreenCanvas API](https://developers.google.com/web/updates/2018/08/offscreen-canvas) to render live charts with big data smoothly. It is really easy to use with just one line amendment.
`canvasElement.transferControlToOffscreen()`

### Expected behaviour [期望结果]
Live charts with big data should work smoothly.