# HG changeset patch
# User Oleksandr Gavenko <gavenkoa@gmail.com>
# Date 1605479563 -7200
# Node ID d31f7473a4b1d743b14a810ba260005492ab2b73
# Parent  9189d278b0756e674fe11d755d80a6526a860fd5
Eliminated lags when navigating diff file cause by visiting files behind the
scene in order to get proper highlighting.

This generates calls to `vc-git-find-revision` and spawn 2 git processes. Noticeably slow on Cygwin.

diff -r 9189d278b075 -r d31f7473a4b1 .emacs-my
--- a/.emacs-my	Sun Nov 01 15:05:04 2020 +0200
+++ b/.emacs-my	Mon Nov 16 00:32:43 2020 +0200
@@ -2575,6 +2575,8 @@
 
 ;; Since 27.1 it is enabled during font-lock. Need to disable explicitly.
 (setq diff-refine nil)
+;; https://emacs.stackexchange.com/questions/61760/lags-when-navigating-vc-root-diff-buffer/
+(setq diff-font-lock-syntax 'hunk-only)
 
 (when (and window-system (< emacs-major-version 26))
   (my--eval-after-load diff-mode