From 9b339a35f05fc9439c82f28605f5fd662bd8734f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sat, 8 May 2021 20:52:06 +0200
Subject: [PATCH] =?UTF-8?q?render:=20warn=20if=20we=E2=80=99re=20forced=20?=
 =?UTF-8?q?to=20double=20buffer=20at=20least=205=20times?=
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---
 render.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/render.c b/render.c
index 8ab30f1b..c65cc7e9 100644
--- a/render.c
+++ b/render.c
@@ -2036,8 +2036,15 @@ force_full_repaint(struct terminal *term, struct buffer *buf)
 static void
 reapply_old_damage(struct terminal *term, struct buffer *new, struct buffer *old)
 {
+    static int counter = 0;
+    static bool have_warned = false;
+    if (!have_warned && ++counter > 5) {
+        LOG_WARN("compositor is not releasing buffers immediately; "
+                 "expect lower rendering performance");
+        have_warned = true;
+    }
+
     if (new->age > 1) {
-        LOG_WARN("copying the entire old buffer");
         memcpy(new->mmapped, old->mmapped, new->size);
         return;
     }