[nojvek]

Ios has a ui thread and a separate thread for application logic. React native makes good use of this to make applications silky smooth.

In Web land, the overhead of communication with workers is costly that it makes sense to do things in main thread. Preact had an worker diffing implementation but that was slower.

We once had to unzip on worker and pass to main thread, it was faster just to do it on UI thread.