scope guard like class for measuring duration (from construction to destruction)

time_measurement.cpp

#include <boost/chrono/chrono_io.hpp>

class MeasureDuration
{
public:

	MeasureDuration(const std::string & name = "unknown" )
	{
		_duration = 0;
		_name = name;
		_start = boost::chrono::high_resolution_clock::now();
	}

	~MeasureDuration()
	{
		boost::chrono::nanoseconds ns = boost::chrono::high_resolution_clock::now() - _start;
		_duration = (double) ns.count() / (1000. * 1000.);
		std::cerr << "duration of " << _name << " in ms: " << _duration << std::endl;
	}

private:
	double _duration;
	std::string _name;
	boost::chrono::high_resolution_clock::time_point _start;
};