Memory optimization

src/LogParser.cpp

@@ -21,6 +21,17 @@
 #include <QRegularExpression>
 #include <memory>
 
+namespace
+{
+	const QString MATCH_GROUP_DATE = "date";
+	const QString MATCH_GROUP_TIME = "time";
+	const QString MATCH_GROUP_THREAD = "thread";
+	const QString MATCH_GROUP_SUBSYS = "subsys";
+	const QString MATCH_GROUP_MESSAGE = "message";
+	const QString MATCH_GROUP_WHERE = "where";
+	const QString MATCH_GROUP_LEVEL = "level";
+}
+
 LogParser::~LogParser()
 {
 	if (ownsFile)
@@ -119,24 +130,34 @@ QString LogParser::GetNextMessage(QTextStream& inputStream)
 	return message;
 }
 
+QString GetMatchFromRawData(const QRegularExpressionMatch& match, const QString& group)
+{
+	QStringView view = match.capturedView(group);
+	return QString::fromRawData((QChar*)view.utf16(), view.length());
+}
+
 LogEntry LogParser::ParseMessage(const QString& message, uint64_t startLineNumber)
 {
 	LogEntry e;
 	e.entryNumber = ++entryCount;
 	e.lineNumber = startLineNumber;
 	const auto match = logEntryRegex.match(message);
 	TryExtractEnvironment(message);
+
+	e.components[LogComponent::ORIGINAL_MESSAGE] = message;
+
 	if (match.hasMatch())
 	{
-		e.components[LogComponent::DATE] = match.captured("date");
-		e.components[LogComponent::TIME] = match.captured("time");
-		e.components[LogComponent::THREAD] = match.captured("thread");
-		e.components[LogComponent::SUB_SYS] = match.captured("subsys");
-		e.components[LogComponent::MESSAGE] = match.captured("message");
-		e.components[LogComponent::WHERE] = match.captured("where");
+		e.components[LogComponent::DATE] = GetMatchFromRawData(match, MATCH_GROUP_DATE);
+		e.components[LogComponent::TIME] = GetMatchFromRawData(match, MATCH_GROUP_TIME);
+		e.components[LogComponent::THREAD] = GetMatchFromRawData(match, MATCH_GROUP_THREAD);
+		e.components[LogComponent::SUB_SYS] = GetMatchFromRawData(match, MATCH_GROUP_SUBSYS);
+		e.components[LogComponent::MESSAGE] = GetMatchFromRawData(match, MATCH_GROUP_MESSAGE);
+		e.components[LogComponent::WHERE] = GetMatchFromRawData(match, MATCH_GROUP_WHERE);
 
 		// Read log level
-		e.level = GetLogLevel(match.captured("level"));
+		const QString type = GetMatchFromRawData(match, MATCH_GROUP_LEVEL);
+		e.level = GetLogLevel(type);
 
 		//TODO
 		e.timeStamp = QDateTime::fromString("20" + e.components[LogComponent::DATE] + ' ' + e.components[LogComponent::TIME], Qt::ISODateWithMs);
@@ -146,7 +167,6 @@ LogEntry LogParser::ParseMessage(const QString& message, uint64_t startLineNumbe
 		e.components[LogComponent::MESSAGE] = message;
 		e.level = GetLogLevel("");
 	}
-	e.components[LogComponent::ORIGINAL_MESSAGE] = message;
 
 	return e;
 }

src/LogViewer.cpp

@@ -43,6 +43,9 @@ LogViewer::LogViewer(QWidget *parent) : InfoAreaEnabledPlainTextEdit(parent)
     QFont font("Monospace");
     font.setStyleHint(QFont::TypeWriter);
     setFont(font);
+
+    setUndoRedoEnabled(false);
+    setUpdatesEnabled(false);
 }
 
 void LogViewer::SetLogHolder(LogHolder* holder)
@@ -72,6 +75,7 @@ void LogViewer::UpdateLogView()
     }
     {
         BlockProfiler setProfiler("Set log view");
+        // Based on application_621.log: The method call below causes a memory consumption of 54MB
         setPlainText(string);
     }
 }

src/LogViewerTab.cpp

@@ -97,6 +97,7 @@ void LogViewerTab::Load(QFile* file)
 	file->close();
 	{
 		BlockProfiler profilerSetFullLog("Set full log view");
+		// Based on application_621.log: Below method call causes 94MB of memory usage
 		ui.fullLogView->setPlainText(log);
 	}