Sync OpenBSD patchset 1072:

Add a simple form of output rate limiting by counting the number of
certain C0 sequences (linefeeds, backspaces, carriage returns) and if it
exceeds a threshold (current default 50/millisecond), start to redraw
the pane every 100 milliseconds instead of making each change as it
comes. Two configuration options - c0-change-trigger and
c0-change-interval.

This makes tmux much more responsive under very fast output (for example
yes(1) or accidentally cat'ing a large file) but may not be perfect on
all terminals and connections - feedback very welcome, particularly
where this change has a negative rather than positive effect (making it
off by default is a possibility).

After much experimentation based originally on a request Robin Lee
Powell (which ended with a completely different solution), this idea
from discussion with Ailin Nemui.

1 files changed, 1 insertions, 1 deletions

diff --git a/tty.c b/tty.c
index 637dace1..680ff324 100644
--- a/tty.c
+++ b/tty.c
@@ -661,7 +661,7 @@ tty_write(
 
 	if (wp->window->flags & WINDOW_REDRAW || wp->flags & PANE_REDRAW)
 		return;
-	if (!window_pane_visible(wp))
+	if (!window_pane_visible(wp) || wp->flags & PANE_DROP)
 		return;
 
 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {