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diff --git a/src/declarative/util/qperformancelog.cpp b/src/declarative/util/qperformancelog.cpp
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+++ b/src/declarative/util/qperformancelog.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qperformancelog_p_p.h"
+
+#include <QHash>
+#include <QDebug>
+
+QT_BEGIN_NAMESPACE
+
+#ifdef Q_ENABLE_PERFORMANCE_LOG
+
+struct QPerformanceLogData 
+{
+    struct Log
+    {
+        Log()
+        : logDescription(0), maxId(-1) {}
+
+        QHash<int, const char *> descriptions;
+        const char *logDescription;
+        int maxId;
+    };
+
+    typedef QHash<QPerformanceLog::LogData *, Log> Logs;
+    Logs logs;
+};
+Q_GLOBAL_STATIC(QPerformanceLogData, performanceLogData);
+
+QPerformanceLog::LogData::LogData(const char *desc)
+: sumTime(0), data(0)
+{
+    QPerformanceLogData *logData = performanceLogData();
+
+    QPerformanceLogData::Log log;
+    log.logDescription = desc;
+    logData->logs.insert(this, log);
+
+    timer.start();
+}
+
+QPerformanceLog::LogMetric::LogMetric(LogData *l, int id, const char *desc)
+{
+    if (id < 0)
+        qFatal("QPerformanceLog: Invalid log id %d ('%s')", id, desc);
+
+    QPerformanceLogData *logData = performanceLogData();
+
+    QPerformanceLogData::Logs::Iterator logIter = logData->logs.find(l);
+    if (logIter == logData->logs.end())
+        qFatal("QPerformanceLog: Unable to locate log for metric '%s'", desc);
+    QPerformanceLogData::Log &log = *logIter;
+    if (log.descriptions.contains(id))
+        qFatal("QPerformanceLog: Duplicate log metric %d ('%s')", id, desc);
+    log.descriptions.insert(id, desc);
+
+    if (log.maxId < id) {
+        log.maxId = id;
+        if (l->data) delete [] l->data;
+        l->data = new unsigned int[2 * (log.maxId + 1)];
+        ::memset(l->data, 0, 2 * (log.maxId + 1) * sizeof(unsigned int));
+    }
+}
+
+static void QPerformanceLog_clear(QPerformanceLog::LogData *l, const QPerformanceLogData::Log *pl)
+{
+    ::memset(l->data, 0, 2 * (pl->maxId + 1) * sizeof(unsigned int));
+}
+
+static void QPerformanceLog_displayData(const QPerformanceLog::LogData *l, const QPerformanceLogData::Log *pl)
+{
+    qWarning() << pl->logDescription << "performance data";
+    unsigned int total = 0;
+    for (QHash<int, const char *>::ConstIterator iter = pl->descriptions.begin();
+            iter != pl->descriptions.end();
+            ++iter) {
+
+        int id = iter.key();
+        unsigned int ms = l->data[id * 2];
+        total += ms;
+        unsigned int inst = l->data[id * 2 + 1];
+        float pi = float(ms) / float(inst);
+        qWarning().nospace() << "    " << *iter << ": " << ms << " ms over " 
+                             << inst << " instances (" << pi << " ms/instance)";
+    }
+    qWarning().nospace() << "    TOTAL: " << total;
+}
+
+void QPerformanceLog::displayData()
+{
+    QPerformanceLogData *logData = performanceLogData();
+
+    for (QPerformanceLogData::Logs::ConstIterator iter = logData->logs.begin();
+            iter != logData->logs.end();
+            ++iter) {
+        QPerformanceLog_displayData(iter.key(), &(*iter));
+    }
+}
+
+void QPerformanceLog::clear()
+{
+    QPerformanceLogData *logData = performanceLogData();
+
+    for (QPerformanceLogData::Logs::ConstIterator iter = logData->logs.begin();
+            iter != logData->logs.end();
+            ++iter) {
+        QPerformanceLog_clear(iter.key(), &(*iter));
+    }
+}
+
+void QPerformanceLog::displayData(LogData *l)
+{
+    QPerformanceLogData *logData = performanceLogData();
+    QPerformanceLogData::Logs::ConstIterator iter = logData->logs.find(l);
+    if (iter == logData->logs.end())
+        qFatal("QPerformanceLog: Internal corruption - unable to locate log");
+
+    QPerformanceLog_displayData(iter.key(), &(*iter));
+}
+
+void QPerformanceLog::clear(LogData *l)
+{
+    QPerformanceLogData *logData = performanceLogData();
+    QPerformanceLogData::Logs::ConstIterator iter = logData->logs.find(l);
+    if (iter == logData->logs.end())
+        qFatal("QPerformanceLog: Internal corruption - unable to locate log");
+
+    QPerformanceLog_clear(iter.key(), &(*iter));
+}
+
+#else // Q_ENABLE_PERFORMANCE_LOG
+
+void QPerformanceLog::displayData()
+{
+}
+
+void QPerformanceLog::clear()
+{
+}
+
+#endif // Q_ENABLE_PERFORMANCE_LOG
+
+QT_END_NAMESPACE