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diff --git a/demos/spectrum/fftreal/stopwatch/StopWatch.h b/demos/spectrum/fftreal/stopwatch/StopWatch.h
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+++ b/demos/spectrum/fftreal/stopwatch/StopWatch.h
@@ -0,0 +1,110 @@
+/*****************************************************************************
+
+        StopWatch.h
+        Copyright (c) 2005 Laurent de Soras
+
+Utility class based on ClockCycleCounter to measure the unit time of a
+repeated operation.
+
+--- Legal stuff ---
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library 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
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+*Tab=3***********************************************************************/
+
+
+
+#if ! defined (stopwatch_StopWatch_HEADER_INCLUDED)
+#define	stopwatch_StopWatch_HEADER_INCLUDED
+
+#if defined (_MSC_VER)
+	#pragma once
+	#pragma warning (4 : 4250) // "Inherits via dominance."
+#endif
+
+
+
+/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+#include	"ClockCycleCounter.h"
+
+
+
+namespace stopwatch
+{
+
+
+
+class StopWatch
+{
+
+/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+public:
+
+						StopWatch ();
+
+	stopwatch_FORCEINLINE void
+						start ();
+	stopwatch_FORCEINLINE void
+						stop_lap ();
+
+	double			get_time_total (Int64 nbr_op) const;
+	double			get_time_best_lap (Int64 nbr_op) const;
+
+
+
+/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+protected:
+
+
+
+/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+private:
+
+	ClockCycleCounter
+						_ccc;
+	Int64				_nbr_laps;
+
+
+
+/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+private:
+
+						StopWatch (const StopWatch &other);
+	StopWatch &		operator = (const StopWatch &other);
+	bool				operator == (const StopWatch &other);
+	bool				operator != (const StopWatch &other);
+
+};	// class StopWatch
+
+
+
+}	// namespace stopwatch
+
+
+
+#include	"StopWatch.hpp"
+
+
+
+#endif	// stopwatch_StopWatch_HEADER_INCLUDED
+
+
+
+/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/