Fastest way to search in milliseconds

Question

I have to find what is the fastest way to search the max random number from my array within a range

• So I create one method that search normal "using one thread" and another one that use threads

I have Class:MaxThread

import java.util.stream.IntStream;

public class MaxThread extends Thread {

    private final int from;
    private final int to;

    public MaxThread(int[] tab, int from, int to) {
        this.from = from;
        this.to = to;
    }

    @Override
    public void run() {
        long start = System.currentTimeMillis();
        int max = IntStream.of(from, to)
                .max()
                .getAsInt();
        long end = System.currentTimeMillis() - start;
        System.out.println("Max number from threads is  : " + max);
        System.out.println("Founded in: " + end + " [ms] ");
    }
}

Class: Main2

    public class Main2{    
    public static void main(String[] args) {
        int[] tab = new int[200000000];
        for (int i = 0; i < tab.length; i++) {
            tab[i] = random(0, 200000000);
        }

        int max = searchMax(0, 50000000);
        System.out.println("Max number without using threads " + max);

        MaxThread maxThread = new MaxThread(tab, 25000000, 150000000);
        maxThread.start();
    }

    public static int random(int start, int end) {
        Random rnd = new Random();
        return rnd.nextInt(end - start + 1) + start;
    }

    public static int searchMax(int from, int to) {

        long start = System.currentTimeMillis();
        int max = IntStream.of(from, to)
                .parallel()
                .max()
                .getAsInt();
        long end = System.currentTimeMillis() - start;
        System.out.println("Founded in: " + end + " [ms] ");
        return max;
    }
   }

I count the time in ms inside the method but I want to see witch one was the fastest to find the number , but here is where I cannot find out the way to do it.

Can someone give me and hint please?