Subject: bug#21092: 25.0.50; Option `lazy-highlight-max-at-a-time' does not work

From: Eli Zaretskii <[email-masked]>
Date: Fri, 28 Aug 2015 19:03:45 +0300

> Date: Fri, 28 Aug 2015 08:59:34 -0700 (PDT)
> From: Drew Adams <[email-masked]>
> Cc: [email-masked]
> 
> I am interested in the general question of whether the
> display engine precludes highlighting more than what is "on screen".

You can, of course, put the overlays or properties with some face on
the entire buffer.  So no, the display engine doesn't preclude that.