From eb5654788b8c1662a4210e6c76c98abd509cf64f Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@kdab.com>
Date: Sun, 17 May 2015 16:44:07 +0200
Subject: Micro-optimize QSettingsPrivate::processChild() and its users

...by using QStringRef instead of QString, avoiding one
memory allocation in the case of spec != AllKeys and
key containing a '/'.

Also calls one less non-inline function, since
QStringRef::truncated() is inline.

Change-Id: Id5eb203006a3857508c5d3f4b729cde1a5170d58
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/io/qsettings_mac.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/corelib/io/qsettings_mac.cpp')

diff --git a/src/corelib/io/qsettings_mac.cpp b/src/corelib/io/qsettings_mac.cpp
index 51321c49e7..083722869f 100644
--- a/src/corelib/io/qsettings_mac.cpp
+++ b/src/corelib/io/qsettings_mac.cpp
@@ -505,7 +505,7 @@ QStringList QMacSettingsPrivate::children(const QString &prefix, ChildSpec spec)
                     QString currentKey =
                             qtKey(static_cast<CFStringRef>(CFArrayGetValueAtIndex(cfarray, k)));
                     if (currentKey.startsWith(prefix))
-                        processChild(currentKey.mid(startPos), spec, result);
+                        processChild(currentKey.midRef(startPos), spec, result);
                 }
             }
         }
-- 
cgit v1.2.3