title: Strategy to Reduce Latency When Sending Data Between iPhone and Apple Watch?
body: <p>Any strategies I can use to reduce the latency when sending data between iPhone and Apple Watch?</p>
  
  <p>On the simulator sometimes the lag is often >0.1s meaning the counter (see code below) will often skip some numbers. After running the counter for a few seconds the lag increases to >1s and the counter skips 10+ numbers very frequently. </p>
  
  <p>I'm trying to build a spritz-like app for Apple Watch which would require words to flash on screen at speeds of ~500 words per minute or 1 word every 0.12 seconds.</p>
  
  <pre><code>- (void)willActivate {
      // This method is called when watch view controller is about to be visible to user
      [super willActivate];
      self.number = 0;
      NSTimer *t = [NSTimer timerWithTimeInterval:0.1 target:self selector:@selector(updateLabelText) userInfo:nil repeats:YES];
      NSRunLoop *runner = [NSRunLoop currentRunLoop];
      [runner addTimer:t forMode: NSDefaultRunLoopMode];
  }
  - (void)updateLabelText {
      NSString *str = [NSString stringWithFormat:@"number %ld", self.number];
      [self.testLabel setText:str];
      self.number += 1;
  }
  </code></pre>