在 2020年1月2日 +0800 AM12:23，Eli Zaretskii <eliz@gnu.org>，写道：
> > Date: Wed, 1 Jan 2020 11:47:49 +0800
> > From: HaiJun Zhang <netjune@outlook.com>
> > Cc: "38807@debbugs.gnu.org" <38807@debbugs.gnu.org>
> >
> > My understanding of the display flow:
> > 1. an event comes which causes redisplay
>
> More often than not, it is not an event, but a command that changes
> Lisp data (buffer text, overlays, text properties, position of point,
> new or deleted windows, etc.).
>

Thanks for your explanation.

> > 2. the display engine prepares the glyph matrix
> > 3. convert the glyph matrix to bitmap and display it
> >
> > I think lots of work are in 2.
>
> Actually, 3 is also a lot of work.

Then 3 can be done in a separate thread from 2 and 1?