From 8a25f888e947d406f69759b51732bdfc041d5707 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@kdab.com>
Date: Sat, 20 Jun 2015 21:34:49 +0200
Subject: [PATCH] QMdiSubWindow: fix O(n+nlogn) loop to O(n)

No further comment.

Change-Id: I2056b97281b5775d59c0ef9b4a5cbf03943a7d6b
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
---
 src/widgets/widgets/qmdisubwindow.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/widgets/widgets/qmdisubwindow.cpp b/src/widgets/widgets/qmdisubwindow.cpp
index 1808030639..c3b31ea5a4 100644
--- a/src/widgets/widgets/qmdisubwindow.cpp
+++ b/src/widgets/widgets/qmdisubwindow.cpp
@@ -1091,8 +1091,8 @@ void QMdiSubWindowPrivate::updateDirtyRegions()
     if (!parent)
         return;
 
-    foreach (Operation operation, operationMap.keys())
-        operationMap.find(operation).value().region = getRegion(operation);
+    for (OperationInfoMap::iterator it = operationMap.begin(), end = operationMap.end(); it != end; ++it)
+        it.value().region = getRegion(it.key());
 }
 
 /*!