From 4413254ff603fa19f4fa22d4936e69f4a6dbbc2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C4=99drzej=20Nowacki?= <jedrzej.nowacki@digia.com>
Date: Wed, 14 May 2014 12:46:18 +0200
Subject: [PATCH] Micro-optimize QDir::relativeFilePath

Use QString::splitRef on platforms with case sensitive paths, to
avoid unnecessary allocations.

Change-Id: Iff331a5eb67c4cbaf1333e663e77290261c5b013
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
---
 src/corelib/io/qdir.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/corelib/io/qdir.cpp b/src/corelib/io/qdir.cpp
index ec7d89fa87b..be15e33fffe 100644
--- a/src/corelib/io/qdir.cpp
+++ b/src/corelib/io/qdir.cpp
@@ -760,9 +760,13 @@ QString QDir::relativeFilePath(const QString &fileName) const
 #endif
 
     QString result;
+#if defined(Q_OS_WIN)
     QStringList dirElts = dir.split(QLatin1Char('/'), QString::SkipEmptyParts);
     QStringList fileElts = file.split(QLatin1Char('/'), QString::SkipEmptyParts);
-
+#else
+    QVector<QStringRef> dirElts = dir.splitRef(QLatin1Char('/'), QString::SkipEmptyParts);
+    QVector<QStringRef> fileElts = file.splitRef(QLatin1Char('/'), QString::SkipEmptyParts);
+#endif
     int i = 0;
     while (i < dirElts.size() && i < fileElts.size() &&
 #if defined(Q_OS_WIN)