On 10 Dec 2015 6:53 am, "Paul Eggert" <eggert@cs.ucla.edu> wrote:
> There's a larger performance hit between 20151109 and 20151110.  The log
for that time period (0730 Pacific cutoff) is attached as log2.txt.
Nothing jumps out, I'm afraid.
>

In one of my commis there I think I added (require 'map) to files.el, but I
don't think the impact of that would be so noticeable.

There's another commit there which could affect performance (it talks about
not using XFASTINT, in a function that is used a bajillion times throughout
core). It's this one by Eli.

commit 86c19714b097aa477d339ed99ffb5136c755a046
Author:     Eli Zaretskii <eliz@gnu.org>
AuthorDate: Mon Nov 9 10:31:45 2015
Commit:     Eli Zaretskii <eliz@gnu.org>
CommitDate: Mon Nov 9 10:31:45 2015

    Fix assertion violation in define-key

    * src/keymap.c (store_in_keymap): Don't use XFASTINT on non-character
    objects.  Reported by Drew Adams <drew.adams@oracle.com>
    and Juanma Barranquero <lekktu@gmail.com>.