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diff --git a/LibOVR/Src/Util/Util_Stopwatch.h b/LibOVR/Src/Util/Util_Stopwatch.h
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+/************************************************************************************
+
+Filename    :   Util_Stopwatch.h
+Content     :   Handy classes for making timing measurements
+Created     :   June 1, 2014
+Authors     :   Neil Konzen
+
+Copyright   :   Copyright 2014 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
+you may not use the Oculus VR Rift SDK except in compliance with the License,
+which is provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+You may obtain a copy of the License at
+
+http://www.oculusvr.com/licenses/LICENSE-3.2
+
+Unless required by applicable law or agreed to in writing, the Oculus VR SDK
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+*************************************************************************************/
+
+#include "Kernel/OVR_Timer.h"
+
+// NOTE: This file is designed to be included in multiple .cpp files
+// with different settings of OVR_DISABLE_STOPWATCH,
+// so there is no include guard or #pragma once.
+
+namespace OVR { namespace Util {
+
+// Declare a StopwatchTimer as a static, global, or member variable.
+// Then use Stopwatch() to accumulate timings within a scope.
+/*
+
+static StopwatchTimer FooTimer("Foo", 37, .003);	// Compute average of 37 timing samples, print timing if average time is greater than .003 seconds
+static StopwatchTimer BarTimer("Bar");			// Print time of each measurement
+
+void SomeFunction()
+{
+	CodeNotToIncludeInTiming();
+
+	{
+		Stopwatch sw(FooTimer);	// sw times everything in its scope
+		Foo();
+	}	// Every 37 times through the loop, if average time of Foo() is > .003 seconds, the average time is printed with LogText()
+
+	{
+		Stopwatch sw(BarTimer);
+		Bar();
+	}	// Elapsed time of Bar() is printed every time
+
+	MoreCodeNotToIncludeInTiming();
+}
+*/
+
+#ifndef OVR_DISABLE_STOPWATCH
+
+class StopwatchTimer
+{
+public:
+	StopwatchTimer(const char* label, int printCount = 1, double printThreshold = 0.0) :
+		StartTime(0),
+		ElapsedTime(0),
+                Label(label),
+		SampleCount(0),
+		PrintCount(printCount),
+		PrintThreshold(printThreshold)
+	{
+	}
+
+	inline void Start()
+	{
+		StartTime = Timer::GetSeconds();
+	}
+
+	inline void Stop()
+	{
+		ElapsedTime += Timer::GetSeconds() - StartTime;
+		if (++SampleCount >= PrintCount)
+			PrintAndReset();
+	}
+
+private:
+
+	void PrintAndReset()
+	{
+		double dt = ElapsedTime / SampleCount;
+        if (dt > PrintThreshold)
+			LogText("%s: %.5f msec\n", Label, dt * 1000);
+
+		// reset for next time
+		ElapsedTime = 0;
+		SampleCount = 0;
+	}
+
+	double StartTime;
+	double ElapsedTime;
+	const char* Label;
+	int SampleCount;
+	int PrintCount;
+	double PrintThreshold;
+};
+
+
+class Stopwatch
+{
+public:
+	inline Stopwatch(StopwatchTimer& timer) : Timer(&timer)	{ Timer->Start(); }
+	inline ~Stopwatch()										{ Timer->Stop(); }
+private:
+	StopwatchTimer* Timer;
+};
+
+#else	// !OVR_DISABLE_STOPWATCH
+
+// Non-invasive, zero-code stopwatch implementation
+
+class StopwatchTimer
+{
+public:
+	inline StopwatchTimer(const char* label, int printCount = 1, double printThreshold = 0.0) {}
+	inline void Start()	{}
+	inline void Stop()		{}
+};
+
+class Stopwatch
+{
+public:
+	inline Stopwatch(StopwatchTimer& timer) {}
+	inline ~Stopwatch()						{}
+};
+
+#endif	// OVR_DISABLE_STOPWATCH
+
+}} // namespace OVR::Util