title: The meaning of Blocking in Chrome console -> Network -> Timing
body: <p>Recently I have noticed that Chrome browser has Timing tab in the Network section.</p>
  
  <p>This tab has the following elements:</p>
  
  <ul>
  <li>Blocking</li>
  <li>Sending</li>
  <li>Waiting</li>
  <li>Receiving</li>
  </ul>
  
  <p>For example here is a screenshot for SO:
  <img src="https://i.stack.imgur.com/EkDrM.png" alt="enter image description here"></p>
  
  <p>Also I think I know what sending, waiting and receiving means, I have no idea what Blocking means.</p>
  
  <p>So what blocking means? What does it block and what makes these numbers smaller/bigger?</p>