From ed000659f9db71ef87860916411453011f527c1f Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Fri, 14 Jun 1996 20:54:26 +0000
Subject: [PATCH] (win32_wnd_proc): No need to forward WM_ERASEBKGND to main
 thread.

---
 src/w32fns.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/w32fns.c b/src/w32fns.c
index 9385d4da0c6..07001736595 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -2930,10 +2930,15 @@ win32_wnd_proc (hwnd, msg, wParam, lParam)
   switch (msg) 
     {
     case WM_ERASEBKGND:
+      /* This is (always?) generated by BeginPaint, so there is no gain
+	 in forwarding this message to the main thread - it can simply
+	 erase the background before repainting. */
+#if 0
       enter_crit ();
       GetUpdateRect (hwnd, &wmsg.rect, FALSE);
       leave_crit ();
       my_post_msg (&wmsg, hwnd, msg, wParam, lParam);
+#endif
       return 1;
     case WM_PALETTECHANGED:
       /* ignore our own changes */
-- 
2.39.5