From 973c4ab56929eeaf83e3270c48fcaba513d9a8a0 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Fri, 26 Jun 2026 13:58:00 +0000
Subject: [PATCH] Drop mouse movement events rather than redrawing
 unnecessarily.

---
 window.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/window.c b/window.c
index 9d3106a22..ac71a72bd 100644
--- a/window.c
+++ b/window.c
@@ -1601,6 +1601,12 @@ window_pane_key(struct window_pane *wp, struct client *c, struct session *s,
 
 	wme = TAILQ_FIRST(&wp->modes);
 	if (wme != NULL) {
+		/*
+		 * No mode uses mouse motion events, so drop them here rather
+		 * than passing them on and causing a redraw on every movement.
+		 */
+		if (KEYC_IS_TYPE(key, KEYC_TYPE_MOUSEMOVE))
+			return (0);
 		if (wme->mode->key != NULL && c != NULL) {
 			key &= ~KEYC_MASK_FLAGS;
 			wme->mode->key(wme, c, s, wl, key, m);