bug#38807: [Feature request]: Support lisp workers like web workers.

[HaiJun Zhang]

在 2019年12月30日 +0800 PM11:40，Dmitry Gutov <dgutov@yandex.ru>，写道：

On 30.12.2019 17:23, Eli Zaretskii wrote:

We have threads in Emacs, so you could start by using them, no?

The main point of Web Workers is that they run in parallel to the main
thread.

So the bit about not being able to access "data in the UI thread" is
about no need for synchronization, I suppose. 

Yes. That is what I mean. They can do heavy work without pausing user input.