threads, mutex and condition variable (the fastest thread)

//in Linux you should compile using
//g++ -std=c++11 file_name.cpp -pthread -o destination_file_name && ./destination_file_name

#include <iostream>
#include <thread>
#include <mutex>
#include <condition_variable>
#include <chrono>

std::mutex mtx;
std::condition_variable cv;

//thanks to
//http://falsinsoft.blogspot.pt/2014/05/set-console-cursor-position-in-windows.html
void setCursorPos(int XPos, int YPos)//linux version
{
    printf("\033[%d;%dH", YPos+1, XPos+1);
}

int main() {

    int i;
    std::chrono::steady_clock::time_point start = std::chrono::steady_clock::now();

    for(i = 0; i < 10; i++) {

        std::thread([](int position) {

            for(int x = 0; x < 10000; x++) {
                mtx.lock();
                setCursorPos(position, position);
                std::cout << "X[" << position << "] -> " << x << std::endl;
                if(x == 9999) {
                    cv.notify_one();
                }
                mtx.unlock();
            }

        }, i).detach();

    }

    std::unique_lock<std::mutex> lck(mtx);
    cv.wait(lck);

    std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
    std::cout << "First thread took "
              << std::chrono::duration_cast<std::chrono::seconds>(end - start).count()
              << "s.\n";

    return 0;
}