What is std::chrono in C++17?

Can you explain what std::chrono is in C++17?

Sure! std::chrono is a library in C++17 that provides tools for time manipulation, including durations, clocks, and time points.

How do I measure the execution time of a function using std::chrono?

You can use std::chrono::high_resolution_clock to measure execution time. Start the clock before the function and stop it after.

Can you show me a code example?

Certainly! Here's a simple example:

#include <iostream>
#include <chrono>

void myFunction() {
    // Simulate work
    for (int i = 0; i < 1000000; ++i);
}

int main() {
    auto start = std::chrono::high_resolution_clock::now();
    myFunction();
    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> duration = end - start;
    std::cout << "Execution time: " << duration.count() << " seconds" << std::endl;
}

This will measure and print the execution time of myFunction.

What are the different clocks available in std::chrono?

std::chrono provides several clocks, including high_resolution_clock, steady_clock, and system_clock, each with different properties.