branches/work/~dfaure/testprogs/app_startup_benchmark

[David Faure]

SVN commit 1187179 by dfaure:

Some cleanups; write down the average results I get:
QProcess::startDetached 28 ms
KToolInvocation::startServiceByDesktopPath 20 ms
=> kdeinit is still useful these days.
With thanks to Kévin for this benchmark.
CCMAIL: kde-optimize at kde.org


 M  +17 -14    appstartupbenchmark.cpp  


--- branches/work/~dfaure/testprogs/app_startup_benchmark/appstartupbenchmark.cpp #1187178:1187179
@@ -58,7 +58,7 @@
         QDBusConnectionInterface *iface = QDBusConnection::sessionBus().interface();
 
         if (iface->isServiceRegistered(m_service)) {
-            kDebug() << "Stopping" << m_service;
+            //kDebug() << "Stopping" << m_service;
             QEventLoop loop;
             QDBusServiceWatcher watcher;
 
@@ -100,12 +100,8 @@
 
         int result = t.elapsed();
 
-        while (QDBusConnection::sessionBus().interface()->isServiceRegistered(m_service)) {
-            kDebug() << "it's running, let's stop it...";
+        //kDebug() << "it's running, let's stop it...";
             ensureServiceStopped();
-            sleep(1);
-            kDebug() << "done sleeping";
-        }
 
         Q_ASSERT(!QDBusConnection::sessionBus().interface()->isServiceRegistered(m_service));
 
@@ -115,7 +111,7 @@
 private slots:
     void delayedStartup()
     {
-        kDebug() << "Starting" << m_service << "using" << m_method;
+        //kDebug() << "Starting" << m_service << "using" << m_method;
         switch(m_method) {
         case QProcess: {
             bool ok = QProcess::startDetached(m_program);
@@ -155,16 +151,15 @@
     return results;
 }
 
-double calculateAverage(const QList<int> results)
+static double calculateAverage(const QList<int>& results)
 {
     return std::accumulate(results.begin(), results.end(), 0.0) / results.size();
 }
 
-double calculateVariance(const QList<int> results)
+static double calculateVariance(const QList<int>& results)
 {
     double avg = calculateAverage(results);
 
-
     double result = 0;
 
     foreach (int val, results) {
@@ -185,13 +180,21 @@
     const QString service("org.kde.kuiserver");
     const int iterations = 100;
 
-    QList<int> processResults = executeBenchmark(program, service, StartupTimer::QProcess, iterations);
-    kDebug() << "QProcess        average:" << calculateAverage(processResults) << "(" << calculateVariance(processResults) << ")";
+    {
+        const QList<int> processResults = executeBenchmark(program, service, StartupTimer::QProcess, iterations);
+        kDebug() << "QProcess       " << processResults;
+        kDebug() << "QProcess        average:" << calculateAverage(processResults) << "( variance" << calculateVariance(processResults) << ")";
+    }
 
-    QList<int> toolInvocationResults = executeBenchmark(program, service, StartupTimer::KToolInvocation, iterations);
-    kDebug() << "KToolInvocation average:" << calculateAverage(toolInvocationResults) << "(" << calculateVariance(toolInvocationResults) << ")";
+    {
+        const QList<int> toolInvocationResults = executeBenchmark(program, service, StartupTimer::KToolInvocation, iterations);
+        kDebug() << "KToolInvocation" << toolInvocationResults;
+        kDebug() << "KToolInvocation average:" << calculateAverage(toolInvocationResults) << "( variance" << calculateVariance(toolInvocationResults) << ")";
+    }
 
     return 0;
 }
 
+// Averages on David's laptop: QProcess 28 ms, KToolInvocation 20 ms
+
 #include "main.moc"