Question

How to measure time in nanoseconds with C++

Answer 1

#include <iostream>
#include <chrono>

int main() {
    auto start = std::chrono::high_resolution_clock::now();
    
    if (1)
        std::cout << "True" << '\n';
    
    auto end = std::chrono::high_resolution_clock::now();
    
    auto time_in_nanoseconds = std::chrono::duration_cast<std::chrono::nanoseconds>(end - start).count();
    
    std::cout << time_in_nanoseconds << " [ns]";
}




/*
run:

True
24993 [ns]

*/

 

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