Test array accesss

#include <iostream>
#include <vector>
#include <ctime>

#define SIZETOTEST 100000

int main (int argc, char * const argv[]) {

    std::vector<int> myvec;
    int myarray[SIZETOTEST];

    for (int i = 0; i < SIZETOTEST; ++i) {
        myvec.push_back(i);
        myarray[i] = i;
    }
    typedef std::vector<int>::iterator IT_int;

    clock_t start,end;

    start = std::clock();
    for (IT_int it = myvec.begin(); it != myvec.end(); ++it) {
        *it += 1;
    }
    end = std::clock();

    std::cout << "iterator it:   " << end - start << std::endl;

    start = std::clock();
    for (int i = 0; i < myvec.size(); ++i) {
        myvec[i] += 1;
    }
    end = std::clock();

    std::cout << "int i:         "<< end - start << std::endl;

    start = std::clock();
    for (int i = 0; i < SIZETOTEST; ++i) {
        myarray[i] = myarray[i] + 1;
    }
    end = std::clock();
    std::cout << "c-style array: " << end - start << std::endl;

    return 0;
}

/*
output: compiled with compiled with XCode 3.2.5, GCC 4.2
in debug mode (no or really few optimization):

iterator it:   2430
int i:         1141
c-style array: 561

in release mode:

iterator it:   108
int i:         160
c-style array: 2
*/