Use QStringBuilder more to optimize memory allocations

Change-Id: I2939ffa10496fdc59e0402a9cb54458565ccd657
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 2 insertions, 5 deletions

diff --git a/src/plugins/platforms/xcb/qxcbmime.cpp b/src/plugins/platforms/xcb/qxcbmime.cpp
index 4803c14c4c..749906d1e8 100644
--- a/src/plugins/platforms/xcb/qxcbmime.cpp
+++ b/src/plugins/platforms/xcb/qxcbmime.cpp
@@ -121,9 +121,7 @@ bool QXcbMime::mimeDataForAtom(QXcbConnection *connection, xcb_atom_t a, QMimeDa
         // so QXcbConnection::atomName() has to be used.
         if (atomName == QLatin1String("text/uri-list")
             && connection->atomName(a) == "text/x-moz-url") {
-            const QByteArray uri = data->split('\n').first();
-            QString mozUri = QString::fromLatin1(uri, uri.size());
-            mozUri += QLatin1Char('\n');
+            const QString mozUri = QLatin1String(data->split('\n').constFirst()) + QLatin1Char('\n');
             *data = QByteArray(reinterpret_cast<const char *>(mozUri.utf16()),
                                mozUri.length() * 2);
         } else if (atomName == QLatin1String("application/x-color"))
diff --git a/src/plugins/platforms/xcb/qxcbscreen.cpp b/src/plugins/platforms/xcb/qxcbscreen.cpp
index e4c92c5206..a9675935f4 100644
--- a/src/plugins/platforms/xcb/qxcbscreen.cpp
+++ b/src/plugins/platforms/xcb/qxcbscreen.cpp
@@ -61,8 +61,7 @@ QXcbVirtualDesktop::QXcbVirtualDesktop(QXcbConnection *connection, xcb_screen_t
     , m_number(number)
     , m_xSettings(Q_NULLPTR)
 {
-    QByteArray cmAtomName("_NET_WM_CM_S");
-    cmAtomName += QByteArray::number(m_number);
+    const QByteArray cmAtomName =  "_NET_WM_CM_S" + QByteArray::number(m_number);
     m_net_wm_cm_atom = connection->internAtom(cmAtomName.constData());
     m_compositingActive = connection->getSelectionOwner(m_net_wm_cm_atom);