Cross-platform, high-resolution time measurement using C++11's std::chrono

playingwithchrono.cpp

#include <iostream>
#include <chrono>
#include <thread>

using namespace std;
using namespace chrono;

int main()
{
	cout << "Measurement resolution: " << 
		duration_cast<nanoseconds>(high_resolution_clock::duration(1)).count()
		<< "ns" << endl;

	cout << "Will now tell thread to sleep for 1ms and measure that in actual time" << endl;

	auto start = high_resolution_clock::now();

	this_thread::sleep_for(milliseconds(1));

	auto end = high_resolution_clock::now();
	auto dur = duration_cast<nanoseconds>(end - start);

	cout << "Measured time: " << dur.count() << "ns" << endl;
	cout << "Delta: " <<
		duration_cast<nanoseconds>(dur - milliseconds(1)).count()
		<< "ns" << endl;

	return 0;
}

Thanks for sharing!

I would use steady_clock instead of high_resolution_clock, since it's the only one which guarantees, well, steady timer. See this https://solarianprogrammer.com/2012/10/14/cpp-11-timing-code-performance/