From 4f57eefe1e84b5a90e08474092ea6fc8825ad5c9 Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 24 Aug 2019 20:54:19 +0200
Subject: patch 8.1.1922: in diff mode global operations can be very slow

Problem:    In diff mode global operations can be very slow.
Solution:   Do not call diff_redraw() many times, call it once when redrawing.
            And also don't update folds multiple times.
---
 src/fold.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/fold.c')

diff --git a/src/fold.c b/src/fold.c
index 482d3c968..6200578fc 100644
--- a/src/fold.c
+++ b/src/fold.c
@@ -813,6 +813,11 @@ foldUpdate(win_T *wp, linenr_T top, linenr_T bot)
 
     if (disable_fold_update > 0)
 	return;
+#ifdef FEAT_DIFF
+    if (need_diff_redraw)
+	// will update later
+	return;
+#endif
 
     /* Mark all folds from top to bot as maybe-small. */
     (void)foldFind(&wp->w_folds, top, &fp);
-- 
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