System.out.println vs PrintWriter

I recommend using PrintWriter if you have to print more than 10^3 lines in one go.

I got this by running these snippets 3 times each for n=10^1 to 10^7 and then taking mean of there execution time.

class Sprint{
    public static void main(String[] args) {
        int n=10000000;
        for(int i=0;i<n;i++){
            System.out.println(i);
        }
    }
}

import java.io.*;
class Pprint{
    public static void main(String[] args) {
        PrintWriter out = new PrintWriter(System.out);
        int n=10000000;
        for(int i=0;i<n;i++){
            out.println(i);
        }
        out.flush();
    }
}