From 469828c847365f77b237aca589e5a9a0aeb9b52f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Fri, 2 Aug 2013 08:31:53 +0200
Subject: [PATCH] Cache display and rootWindow

No need to go through the QPA interface each time we access the
Display variable or need the root window.
---
 libkwineffects/kwinglobals.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/libkwineffects/kwinglobals.h b/libkwineffects/kwinglobals.h
index 866b279b52..53a0502052 100644
--- a/libkwineffects/kwinglobals.h
+++ b/libkwineffects/kwinglobals.h
@@ -118,7 +118,11 @@ enum KWinOption {
 inline
 KWIN_EXPORT Display* display()
 {
-    return QX11Info::display();
+    static Display *s_display = nullptr;
+    if (!s_display) {
+        s_display = QX11Info::display();
+    }
+    return s_display;
 }
 
 inline
@@ -134,7 +138,11 @@ KWIN_EXPORT xcb_connection_t *connection()
 inline
 KWIN_EXPORT xcb_window_t rootWindow()
 {
-    return QX11Info::appRootWindow();
+    static xcb_window_t s_rootWindow = XCB_WINDOW_NONE;
+    if (s_rootWindow == XCB_WINDOW_NONE) {
+        s_rootWindow = QX11Info::appRootWindow();
+    }
+    return s_rootWindow;
 }
 
 inline