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

From: HaiJun Zhang <[email-masked]>
Date: Sat, 4 Jan 2020 17:33:18 +0800

在 2020年1月4日 +0800 PM4:59，Eli Zaretskii <[email-masked]>，写道：
> How would that work? We don't have any such message queues in Emacs,
> and no machinery to display them, nor for telling the user which job
> reported the message.

Some APIs need to be added for communication use. The UI part of the email client known what happens and will tell the user.

> And again, some low-level Lisp functions issue messages when they like
> that, out of the application's control. What do you do with those?
>

The lisp machine need to be modified for running workers. When running workers, It may save the messages to a log file.

> I'm saying that fetching email doesn't need any Lisp, it can be done
> in C. And if so, you don’t need Lisp-level threads at all.

Many emacs hackers may prefer lisp to C. Writing lisp is faster than C. And compiling C is not an easy
 thing for many users.