path: root/src/corelib/tools
diff options
authorMarc Mutz <>2015-02-28 15:18:11 +0100
committerMarc Mutz <>2016-02-25 02:21:07 +0000
commit8dc024adc64ba667ede2854b2411775a9e18cafc (patch)
tree5333e3883c038d9bfc8305fefbac81f6eed8003d /src/corelib/tools
parent8b5651eb41954cbcbcb3ddd66179711dac0bc1df (diff)
QtCore: replace QStringLiteral with QLatin1String when appending
It makes little sense to use QStringLiteral for strings which are immediately appended to, or which are appended to other strings, because no dynamic memory allocation is saved by doing so. But if the only advantage of QStringLiteral does not apply, all its disadvantages dominate, to wit: injection of calls to qstring dtor, non-sharability of data between C strings and QStringLiterals and among QStringLiterals, and doubled storage requirements. Fix by replacing QStringLiteral with QLatin1String. Saves 1156B in text size on stripped optimized Linux AMD64 GCC 4.9 builds. Change-Id: If805e431f570ec1d2ac62c548f516f1b17390c3a Reviewed-by: Olivier Goffart (Woboq GmbH) <>
Diffstat (limited to 'src/corelib/tools')
2 files changed, 2 insertions, 2 deletions
diff --git a/src/corelib/tools/qcommandlineparser.cpp b/src/corelib/tools/qcommandlineparser.cpp
index a9d3c7f5d8..6587d900d2 100644
--- a/src/corelib/tools/qcommandlineparser.cpp
+++ b/src/corelib/tools/qcommandlineparser.cpp
@@ -1029,7 +1029,7 @@ QString QCommandLineParser::helpText() const
static QString wrapText(const QString &names, int longestOptionNameString, const QString &description)
const QLatin1Char nl('\n');
- QString text = QStringLiteral(" ") + names.leftJustified(longestOptionNameString) + QLatin1Char(' ');
+ QString text = QLatin1String(" ") + names.leftJustified(longestOptionNameString) + QLatin1Char(' ');
const int indent = text.length();
int lineStart = 0;
int lastBreakable = -1;
diff --git a/src/corelib/tools/qtimezoneprivate_win.cpp b/src/corelib/tools/qtimezoneprivate_win.cpp
index 0984949286..1d19f01b4e 100644
--- a/src/corelib/tools/qtimezoneprivate_win.cpp
+++ b/src/corelib/tools/qtimezoneprivate_win.cpp
@@ -378,7 +378,7 @@ void QWinTimeZonePrivate::init(const QByteArray &ianaId)
m_standardName = readRegistryString(baseKey, L"Std");
m_daylightName = readRegistryString(baseKey, L"Dlt");
// On Vista and later the optional dynamic key holds historic data
- const QString dynamicKeyPath = baseKeyPath + QStringLiteral("\\Dynamic DST");
+ const QString dynamicKeyPath = baseKeyPath + QLatin1String("\\Dynamic DST");
HKEY dynamicKey = NULL;
if (openRegistryKey(dynamicKeyPath, &dynamicKey)) {
// Find out the start and end years stored, then iterate over them