patch 8.1.1922: in diff mode global operations can be very slow Commit: https://github.com/vim/vim/commit/4f57eefe1e84b5a90e08474092ea6fc8825ad5c9 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Aug 24 20:54:19 2019 +0200 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.

# Test of WRAP AROUND mode setting.
INIT
WANTSCREEN

RESET

PUSH "\e[?7h"
$REP 170: PUSH "*"

PUSH "\e[?7l\e[3;1H"
$REP 177: PUSH "*"

PUSH "\e[?7h\e[5;1HOK"

!Output
$SEQ 0 2: ?screen_row \# = "********************************************************************************"
          ?screen_row  3 = ""
          ?screen_row  4 = "OK"