A function timer I wrote that automatically times functions, and prints the times to the console of an OpenFrameworks app. It needs to be declared on the stack to work correctly (uses the principle of object lifetimes for timing). I use it to profile the performance of my AI Algorithms.

FunctionTimer.h

#pragma once

#include <chrono>
#include <ofLog.h>
#include <string>

namespace AI
{
	namespace PerformanceTools
	{
		class FunctionTimer
		{
		public:
			FunctionTimer(const std::string& i_functionName)
			{
				m_functionName = i_functionName;
				m_start = std::chrono::high_resolution_clock::now();
			}

			~FunctionTimer()
			{
				m_end = std::chrono::high_resolution_clock::now();
				m_duration = m_end - m_start;
				float durationMS = m_duration.count() * 1000.f;

				ofLog() << "PERFORMANCE MEASUREMENT: Function '" << m_functionName << "' took " << durationMS << " milliseconds to execute";
			}
		private:
			std::chrono::time_point<std::chrono::steady_clock> m_start, m_end;
			std::chrono::duration<float> m_duration;

			std::string m_functionName;
		};
	}
}