how to check code execution time in visual studio c++

To check the code execution time in Visual Studio C++, you can use the std::chrono library. Below are the steps to measure code execution time:

Step 1: Include the necessary headers

#include <iostream>
#include <chrono>

Step 2: Define the code to be measured

void myFunction() {
    // Code to be measured
}

Step 3: Create variables to store start and end time

std::chrono::high_resolution_clock::time_point startTime, endTime;

Step 4: Capture the start time

startTime = std::chrono::high_resolution_clock::now();

Step 5: Call the code to be measured

myFunction();

Step 6: Capture the end time

endTime = std::chrono::high_resolution_clock::now();

Step 7: Calculate the duration

auto duration = std::chrono::duration_cast<std::chrono::microseconds>(endTime - startTime).count();

Step 8: Print the duration

std::cout << "Execution time: " << duration << " microseconds" << std::endl;

Here's a complete example that demonstrates the above steps:

#include <iostream>
#include <chrono>

void myFunction() {
    // Code to be measured
    for (int i = 0; i < 1000000; i++) {
        // Some computation
    }
}

int main() {
    std::chrono::high_resolution_clock::time_point startTime, endTime;

    startTime = std::chrono::high_resolution_clock::now();

    myFunction();

    endTime = std::chrono::high_resolution_clock::now();

    auto duration = std::chrono::duration_cast<std::chrono::microseconds>(endTime - startTime).count();

    std::cout << "Execution time: " << duration << " microseconds" << std::endl;

    return 0;
}

This code measures the execution time of the myFunction function. The std::chrono::high_resolution_clock is used to capture the start and end time, and the std::chrono::duration_cast is used to calculate the duration in microseconds. Finally, the duration is printed to the console.