speed test for insert to vector begin

#include <iostream>
#include <vector>
#include <functional>
#include <cstring>


using namespace std;


double one_test0(int count, int values[]) {
    vector<int> m;

    for (int i = 0; i < count - 1; ++i) {
        m.push_back(i);
    }
    double start = clock();

    m.insert(m.begin(), values[count - 1]);

    double end = clock();
    return (end - start) / CLOCKS_PER_SEC;
}

double one_test1(int count, int values[]) {
    vector<int> m;

    for (int i = 0; i < count - 1; ++i) {
        m.push_back(i);
    }
    m.shrink_to_fit();
    double start = clock();

    m.insert(m.begin(), values[count - 1]);

    double end = clock();
    return (end - start) / CLOCKS_PER_SEC;
}

double run(function<double(int, int[])> func, int count, int values[]) {
    double time = 0;
    int tries = 10;
    for (int i = 0; i < tries; ++i) {
        time += func(count, values);
    }
    return time / tries;
}

int main() {
    vector<int> counts = {
       5000000,
      10000000,
     100000000
    };
    int max_count = counts.back();
    int* v = new int[max_count];
    for (int i = 0; i < max_count; ++i) {
        v[i] = rand();
    }

    vector<function<double(int, int[])>> one_tests = {
        one_test0,
        one_test1
    };



    for (auto count : counts) {
        printf("count=%d\n", count);
        for (int i = 0; i < one_tests.size(); ++i) {
            printf("\ttest #%d\t: \t%.10lfsec\n", i, run(one_tests[i], count, v));
        }
    }

    return 0;
}