多线程暴力破解效率测试

package com.cmb;

import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class TEST {
    private static ExecutorService executorService = Executors.newFixedThreadPool(16);
    private static Set numberSet = new HashSet();
    private static Set charSet = new HashSet();
    private static boolean find = false;
    private static int step = 10;
    static {
        for (int i = 0; i < 10; i++) {
            numberSet.add(i);
        }
        for (char i = 'a'; i <= 'z'; i++) {
            charSet.add(i);
        }
        for (char i = 'A'; i <= 'Z'; i++) {
            charSet.add(i);
        }
    }
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String password = sc.nextLine();
        long stTime = System.currentTimeMillis();
        for (long i = 0; i < Long.MAX_VALUE ; i++) {
            if (password.equals(String.valueOf(i))){
                System.out.println(password);
                break;
            }
        }
        System.out.println("单线程:" + (System.currentTimeMillis()-stTime));
        try {
            Thread.sleep(2500);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        List<Object> list = new ArrayList();
        for (int i = 0; i < 10; i++) {
            list.add(i);
        }
        stTime = System.currentTimeMillis();
        CompletableFuture[] objects = list.stream().map(i -> CompletableFuture.runAsync(() -> {
            long st = Long.valueOf(String.valueOf(i));
            for (long j = 0; j < Long.MAX_VALUE; j++) {
                if (password.equals(String.valueOf(st)) || find){
                    System.out.println(password);
                    find = true;
                    break;
                }
                st += step;
            }
        }, executorService)).toArray(CompletableFuture[]::new);
        CompletableFuture.allOf(objects).join();
        System.out.println("多线程:" + (System.currentTimeMillis()-stTime));

    }
}