Subject: Re: bug#37652: 26.3; performance drops massively when on some elisp manual pages

From: Eli Zaretskii <[email-masked]>
Date: Tue, 08 Oct 2019 11:13:48 +0300

> From: "Chris Hecker" <[email-masked]>
> Date: Tue, 08 Oct 2019 00:48:21 +0000
> 
> 1. start emacs -Q for 26.3
> 2. hit C-h i to get to the info directory
> 3. m elisp
> 4. m buffer contents
> 5. page around in the file for a few seconds, emacs starts crawling and
> using an entire cpu

Does it help to set inhibit-compacting-font-caches to a non-nil value?
If so, this problem is already solved in the development code.