Show summary when using -profile command line option

Change-Id: Ieeec4be993b1c53a59407349d365a6aaf1a92e32
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

src/libs/extensionsystem/pluginmanager.cpp

@@ -837,6 +837,7 @@ void PluginManagerPrivate::nextDelayedInitialize()
     if (delayedInitializeQueue.isEmpty()) {
         delete delayedInitializeTimer;
         delayedInitializeTimer = 0;
+        profilingSummary();
         emit q->initializationDone();
     } else {
         delayedInitializeTimer->start();
@@ -1308,6 +1309,7 @@ void PluginManagerPrivate::profilingReport(const char *what, const PluginSpec *s
         const int absoluteElapsedMS = m_profileTimer->elapsed();
         const int elapsedMS = absoluteElapsedMS - m_profileElapsedMS;
         m_profileElapsedMS = absoluteElapsedMS;
+        m_profileTotal[spec] += elapsedMS;
         if (spec)
             qDebug("%-22s %-22s %8dms (%8dms)", what, qPrintable(spec->name()), absoluteElapsedMS, elapsedMS);
         else
@@ -1315,6 +1317,24 @@ void PluginManagerPrivate::profilingReport(const char *what, const PluginSpec *s
     }
 }
 
+void PluginManagerPrivate::profilingSummary() const
+{
+    if (!m_profileTimer.isNull()) {
+        typedef QMultiMap<int, const PluginSpec *> Sorter;
+        Sorter sorter;
+
+        QHash<const PluginSpec *, int>::ConstIterator it1 = m_profileTotal.constBegin();
+        QHash<const PluginSpec *, int>::ConstIterator et1 = m_profileTotal.constEnd();
+        for (; it1 != et1; ++it1)
+            sorter.insert(it1.value(), it1.key());
+
+        Sorter::ConstIterator it2 = sorter.begin();
+        Sorter::ConstIterator et2 = sorter.end();
+        for (; it2 != et2; ++it2)
+            qDebug("%-22s %8dms", qPrintable(it2.value()->name()), it2.key());
+    }
+}
+
 /*!
     \fn void PluginManager::getObjectByName(const QString &name) const
     \brief Retrieves one object with a given name from the object pool.

src/libs/extensionsystem/pluginmanager_p.h

@@ -72,6 +72,7 @@ public:
     void loadPlugin(PluginSpec *spec, PluginSpec::State destState);
     void resolveDependencies();
     void initProfiling();
+    void profilingSummary() const;
     void profilingReport(const char *what, const PluginSpec *spec = 0);
     void setSettings(QSettings *settings);
     void setGlobalSettings(QSettings *settings);
@@ -114,6 +115,7 @@ public:
 
     QStringList arguments;
     QScopedPointer<QTime> m_profileTimer;
+    QHash<const PluginSpec *, int> m_profileTotal;
     int m_profileElapsedMS;
     unsigned m_profilingVerbosity;
     QSettings *settings;