gistfile1.cpp

#include <iostream>
#include <algorithm>
#include <ctime>
#include <random>
using namespace std;
size_t const s = 0x1000000;
size_t a[s];
template <typename T>
void test(T f) {
    clock_t c1 = clock();
    f();
    clock_t c2 = clock();
    cout << c2 - c1 << "ms" << endl;
}
int main() {
    test([](){mt19937_64 e; for (size_t & n : a) n = e();});
    test([](){sort(a, a + s);});
}