GNU bug report logs - #56682
Fix the long lines font locking related slowdowns

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Message #802 received at 56682 <at> debbugs.gnu.org (full text, mbox):

From: Gregory Heytings <gregory <at> heytings.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 56682 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>,
 Dmitry Gutov <dgutov <at> yandex.ru>
Subject: Re: bug#56682: Fix the long lines font locking related slowdowns
Date: Wed, 03 Aug 2022 22:10:25 +0000

By the way, I found at least one other case in which Emacs silently 
refuses to do what the programmer asked it to do.

A recipe:

emacs -Q
M-: (setq max-specpdl-size 100) RET
M-: max-specpdl-size RET ;; this returns 100, as expected
C-x C-f lisp/simple.el RET
M-: max-specpdl-size RET ;; this returns 400, why?
M-: (setq max-specpdl-size 100) RET
M-: max-specpdl-size RET ;; this returns 100 again, as expected
C-v ;; lean on the key until the end of the buffer
M-: max-specpdl-size RET ;; this returns 265, why?

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