Subject: bug#16526: 24.3.50; scroll-conservatively & c-mode regression. The purpose of revision 116070.

From: Stefan Monnier <[email-masked]>
Date: Sat, 25 Jan 2014 18:02:08 -0500

> - it brutally returns BOB, no matter what.  Perhaps some sort of cache of
> safe positions (doesn't one exist already?) could accelerate
> find_defun_start to acceptable speed in this use case.

syntax-ppss maintains such a cache.  But it's in Elisp.

        Stefan