From 7274f5c177d49660ed8c06998da402a09f5f31c6 Mon Sep 17 00:00:00 2001
From: Jan Edmund Lazo <jan.lazo@mail.utoronto.ca>
Date: Sat, 16 Nov 2019 12:31:46 -0500
Subject: vim-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.
https://github.com/vim/vim/commit/4f57eefe1e84b5a90e08474092ea6fc8825ad5c9
---
 src/nvim/fold.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/nvim/fold.c')

diff --git a/src/nvim/fold.c b/src/nvim/fold.c
index 5ce953e626..b193b4005c 100644
--- a/src/nvim/fold.c
+++ b/src/nvim/fold.c
@@ -771,6 +771,11 @@ void foldUpdate(win_T *wp, linenr_T top, linenr_T bot)
     return;
   }
 
+  if (need_diff_redraw) {
+    // will update later
+    return;
+  }
+
   // Mark all folds from top to bot as maybe-small.
   fold_T *fp;
   (void)foldFind(&wp->w_folds, top, &fp);
-- 
cgit