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

int main()
{
    using namespace std::chrono;
    
    std::vector<float> v;
    v.reserve(172490752);
    
    auto tp0 = steady_clock::now();
    for (auto i=v.capacity(); i--;)
        v.push_back(1.0f+i);
    auto tp1 = steady_clock::now();
    std::cout << v.size() << " elements\n";
    std::cout << duration_cast<milliseconds>(tp1-tp0).count() << "ms\n";
}