[silverwind]

Yes, that's `ShardedWorker`.

[nikeee]

I wanted so use these in a project recently, only to find out that they aren't supported on Chrome for Android. This makes them non-usable for me, since there is no drop-in polyfill available yet.

[silverwind]

If you are doing websocket in there, you could fall back to main thread, but it comes at the cost of code duplication.