CoreLib: use QStringRef to optimize memory allocation

Replace substring functions that return QString with
corresponding functions that return QStringRef where
it's possible.

Create QString from QStringRef only where necessary.

Change-Id: Id9ea11b16947220cd27787c0b529de62d10b6c26
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/corelib/kernel/qtranslator.cpp b/src/corelib/kernel/qtranslator.cpp
index 2c813b5156..e016773bde 100644
--- a/src/corelib/kernel/qtranslator.cpp
+++ b/src/corelib/kernel/qtranslator.cpp
@@ -487,7 +487,7 @@ bool QTranslator::load(const QString & filename, const QString & directory,
     }
 
     const QString suffixOrDotQM = suffix.isNull() ? dotQmLiteral() : suffix;
-    QString fname = filename;
+    QStringRef fname(&filename);
     QString realname;
     QString delims;
     delims = search_delimiters.isNull() ? QStringLiteral("_.") : search_delimiters;