Subject: When font size is temporarily increased Emacs is slow also on 25.2.1

From: Gennady Uraltsev <[email-masked]>
Date: Sat, 8 Apr 2017 16:10:10 +0200

Sorry, found this bug only now. Did some profile measurements and
reported it here:

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=26402

Let me know if I can be useful. Seems like quite an big issue.