!747
!awt {
!actionListener {

m {
  p {
    final new JTextArea textArea;
    makeFrame(new JScrollPane(textArea));
    
    final new StringBuffer buf;
    
    final DelayedUpdate du = new DelayedUpdate(runnable {
      textArea.append(buf.substring(textArea.getText().length()));
    });
    
    thread {
      for (int i = 0; i <= 95; i++) {
        buf.append(i + " " + now() + "\n");
        sleep(100);
        du.trigger();
      }
    }
  }
  
  static class DelayedUpdate {
    Runnable renderer;
    volatile long version;
    long lastUpdate; // AWT time
    int delay = 1000;
    
    *(Runnable *renderer) {}

    void trigger() {
      awt {
        awt_quickUpdate();
      }

      final long n = ++version;
      
      javax.swing.Timer timer = new javax.swing.Timer(delay, actionListener {
        awt_show(n);
      });
      timer.setRepeats(false);
      timer.start(); 
    }
 
    void awt_quickUpdate() {
      if (lastUpdate < now()-delay) {
        render();
        lastUpdate = now(); // This can be rough, no problem
      }
    }

    void awt_show(long n) {
      if (n == version) {
        render();
        lastUpdate = now();
      }
    }
    
    void render() {
      try {
        renderer.run();
      } catch (Throwable e) {
        e.printStackTrace();
      }
    }
  }
}

Began life as a copy of #1000926

Last line displayed should be "95 ..."