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QTime: optimize toString() 

Instead of using a QString::arg() cascade, which creates tons of
temporaries, use good 'ol sprintf().

Effects on Linux GCC 4.9 stripped release builds:
 text   -308B
 data    +-0B
 relocs  +-0

Change-Id: I348577491d1399b5040f7ed9e9f6b111a9528e5d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
bb10
Marc Mutz 2015-01-22 19:28:01 +01:00
parent 1e824bb9c4
commit aab749487f
1 changed files with 1 additions and 3 deletions
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4
src/corelib/tools/qdatetime.cpp
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@ -1569,9 +1569,7 @@ QString QTime::toString(Qt::DateFormat format) const
case Qt::ISODate:
case Qt::TextDate:
default:
return QString::fromLatin1("%1:%2:%3").arg(hour(), 2, 10, QLatin1Char('0'))
.arg(minute(), 2, 10, QLatin1Char('0'))
.arg(second(), 2, 10, QLatin1Char('0'));
return QString::asprintf("%02d:%02d:%02d", hour(), minute(), second());
}
}