From: Chong Yidong <cyd@gnu.org>
Date: Sun, 17 Jun 2012 10:11:39 +0000 (+0800)
Subject: Optimization to avoid redisplaying hidden terminal frames.
X-Git-Tag: emacs-24.2.90~1199^2~444
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=96a313a1daea14c0b125857f2775aae911045349;p=emacs.git

Optimization to avoid redisplaying hidden terminal frames.

* xdisp.c (redisplay_internal): No need to redisplay terminal
frames that are not on top.
---

diff --git a/src/ChangeLog b/src/ChangeLog
index ba029611cdb..309f4447dbc 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2012-06-17  Chong Yidong  <cyd@gnu.org>
+
+	* xdisp.c (redisplay_internal): No need to redisplay terminal
+	frames that are not on top.
+
 2012-06-17  Troels Nielsen  <bn.troels@gmail.com>
 
 	* process.c (make_process): Initialize write_queue.
diff --git a/src/xdisp.c b/src/xdisp.c
index cd5f03d34ad..f371346589b 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -13317,6 +13317,12 @@ redisplay_internal (void)
 	{
 	  struct frame *f = XFRAME (frame);
 
+	  /* We don't have to do anything for unselected terminal
+	     frames.  */
+	  if ((FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f))
+	      && !EQ (FRAME_TTY (f)->top_frame, frame))
+	    continue;
+
 	  if (FRAME_WINDOW_P (f) || FRAME_TERMCAP_P (f) || f == sf)
 	    {
 	      if (! EQ (frame, selected_frame))