package test;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Random;

import static java.lang.System.currentTimeMillis;

public class Test {
    public static void main(String[] args) throws IOException {
        Random random = new Random();
        for (int attempt = 0; attempt < 10; attempt++) {
            byte[] array = new byte[2_000_000_000];
            for (int i = 0; i < array.length; i++) {
                if (random.nextInt(64) == 0) {
                    array[i] = 13;
                } else {
                    array[i] = (byte) (32 + random.nextInt(127 - 32));
                }
            }
            int checksum = 0;
            long startTime = currentTimeMillis();
            for (int i = 0; i < array.length; i++) {
                checksum ^= array[i];
            }
            System.out.println(currentTimeMillis() - startTime);
            startTime = currentTimeMillis();
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(array);
            InputStreamReader inputStreamReader = new InputStreamReader(byteArrayInputStream, StandardCharsets.UTF_8);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                var lineLength = line.length();
                for (int i = 0; i < lineLength; i++) {
                    checksum ^= line.charAt(i);
                }
                checksum ^= 13;
            }
            System.out.println(currentTimeMillis() - startTime);
            System.out.println(checksum);
        }
    }
}