How can I evaluate the performance of C++ standard algorithms?

What are some ways to evaluate the performance of C++ standard algorithms?

You can evaluate performance by measuring execution time, memory usage, and comparing results with different algorithms.

How do I measure execution time in C++?

You can use the <chrono> library to measure execution time. Start a timer before the algorithm and stop it after.

Can you show me a code example?

Sure! Here's a simple example using std::sort:

#include <iostream>
#include <vector>
#include <algorithm>
#include <chrono>

int main() {
    std::vector<int> vec = {5, 3, 8, 1, 2};
    auto start = std::chrono::high_resolution_clock::now();
    std::sort(vec.begin(), vec.end());
    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> duration = end - start;
    std::cout << "Sorting took " << duration.count() << " seconds." << std::endl;
}

What about memory usage? How can I track that?

You can use tools like Valgrind or built-in profilers to track memory usage during the execution of your algorithms.