thread safe loop performance test

timeThread.java

import java.lang.Runnable;
import java.lang.Thread;
import java.lang.InterruptedException;
import java.util.concurrent.atomic.AtomicLong;

class timeThread {
private
  static AtomicLong running_ms =
      new AtomicLong(0); // atomic is thread safe variable
private
  static long start = System.currentTimeMillis();

public
  static void main(String[] args) {
    Thread incrementTimer = new Thread(runClock);
    incrementTimer.start();
    long counter = 0;
    long timeout = 1000;
    while (true) {
      long time = running_ms.get();
      if (time <= timeout) {
        ++counter;
      } else {
        System.out.print(counter / time + "\r");
        timeout = time + 1000;
      };
    }
  };

  static Runnable runClock = new Runnable() {
  public
    void run() {
      while (true) {
        long now = System.currentTimeMillis();
        running_ms.set(now - start);
        try {
          Thread.sleep(1);
        } catch (InterruptedException ie) {
        };
      }
    };
  };
};