diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -502,6 +502,7 @@
     touch_hide_cursor_spy.cpp
     internal_client.cpp
     xwl/xwayland_interface.cpp
+    frame_statistics.cpp
    )
 
 include(ECMQtDeclareLoggingCategory)
diff --git a/composite.h b/composite.h
--- a/composite.h
+++ b/composite.h
@@ -21,6 +21,7 @@
 #pragma once
 
 #include <kwinglobals.h>
+#include "frame_statistics.h"
 
 #include <QObject>
 #include <QElapsedTimer>
@@ -80,6 +81,10 @@
      **/
     void bufferSwapComplete();
 
+    const FrameStatistics &frameStatistics() const {
+        return m_frameStatistics;
+    }
+
     /**
      * @brief Suspends the Compositor if it is currently active.
      *
@@ -221,6 +226,7 @@
 
     int m_framesToTestForSafety = 3;
     QElapsedTimer m_monotonicClock;
+    FrameStatistics m_frameStatistics;
 
     KWIN_SINGLETON_VARIABLE(Compositor, s_compositor)
 };
diff --git a/composite.cpp b/composite.cpp
--- a/composite.cpp
+++ b/composite.cpp
@@ -273,6 +273,7 @@
     }
 
     connect(m_scene, &Scene::resetCompositing, this, &Compositor::reinitialize);
+    m_frameStatistics.reset();
     emit sceneCreated();
 
     if (Workspace::self()) {
@@ -763,6 +764,7 @@
     } else {
         scheduleRepaint();
     }
+    m_frameStatistics.addFrame();
 }
 
 template <class T>
diff --git a/frame_statistics.h b/frame_statistics.h
new file mode 100644
--- /dev/null
+++ b/frame_statistics.h
@@ -0,0 +1,59 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2019 Martin Flöser <mgraesslin@kde.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+#pragma once
+#include <queue>
+#include <chrono>
+
+namespace KWin
+{
+
+/**
+ * Simple class to record the render time of the last frames.
+ **/
+class FrameStatistics
+{
+public:
+    /**
+     * Records the rendering of a frame.
+     **/
+    void addFrame();
+    /**
+     * Resets the statistics. E.g. to be used when restarting the compositor or after waking up
+     * from suspend.
+     **/
+    void reset();
+
+    /**
+     * The number of frames currently recorded.
+     **/
+    std::size_t numberOfFrames() const;
+
+    /**
+     * The time in milliseconds between last recorded and first recorded frame.
+     **/
+    std::chrono::milliseconds measuredTime() const;
+
+private:
+    std::size_t m_framesToKeep = 720u;
+    std::queue<std::chrono::milliseconds> m_frameTimes;
+
+};
+
+}
diff --git a/frame_statistics.cpp b/frame_statistics.cpp
new file mode 100644
--- /dev/null
+++ b/frame_statistics.cpp
@@ -0,0 +1,53 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2019 Martin Flöser <mgraesslin@kde.org>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+#include "frame_statistics.h"
+
+namespace KWin
+{
+
+void FrameStatistics::addFrame()
+{
+    m_frameTimes.push(std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now().time_since_epoch()));
+    if (m_frameTimes.size() > m_framesToKeep) {
+        m_frameTimes.pop();
+    }
+}
+
+void FrameStatistics::reset()
+{
+    while (!m_frameTimes.empty()) {
+        m_frameTimes.pop();
+    }
+}
+
+std::size_t FrameStatistics::numberOfFrames() const
+{
+    return m_frameTimes.size();
+}
+
+std::chrono::milliseconds FrameStatistics::measuredTime() const
+{
+    if (m_frameTimes.empty()) {
+        return std::chrono::milliseconds::zero();
+    }
+    return m_frameTimes.back() - m_frameTimes.front();
+}
+
+}
diff --git a/workspace.cpp b/workspace.cpp
--- a/workspace.cpp
+++ b/workspace.cpp
@@ -1607,6 +1607,14 @@
         default:
             support.append(QStringLiteral("Something is really broken, neither OpenGL nor XRender is used"));
         }
+
+        support.append(i18n("\nRendering statistics:\n"));
+        support.append(i18n("Please note: KWin renders on demand and does not keep a constant frame rate.\n"
+            "Due to that the recorded frame rate is expected to be significantly lower than the screen refresh rate.\n"
+            "In case of multiple screens with different refresh rates, the screen with the lowest refresh rate is the reference.\n"));
+        const auto &statistics = Compositor::self()->frameStatistics();
+        support.append(i18n("%1 frames rendered during the last %2 msec.\n", statistics.numberOfFrames(), statistics.measuredTime().count()));
+
         support.append(QStringLiteral("\nLoaded Effects:\n"));
         support.append(QStringLiteral(  "---------------\n"));
         foreach (const QString &effect, static_cast<EffectsHandlerImpl*>(effects)->loadedEffects()) {