title: To hide or to remove html loader?
body: <p>We discussed this topic with colleagues... Is it better to hide/show or add/remove GIF loader in HTML using JavaScript? We came to this:</p>
  
  <p>Hide/show pros:</p>
  
  <ul>
  <li>showing the loader does not require its creation using JavaScript so it should be faster; Is negligible?</li>
  <li>is simpler</li>
  <li>GIF picture is readily available</li>
  </ul>
  
  <p>Add/remove pros:</p>
  
  <ul>
  <li>removing the loader (thus DOM element) should speed up querying/working with DOM elements</li>
  <li>if your site has a lot of loaders, it is possibly slower to download; Can negate using HTML5 Application Cache?</li>
  <li>lazy loading - GIF picture needs to be downloaded only if it is necessary</li>
  </ul>
  
  <p>Are there more pros/cons? How do you work with GIF loaders? Which technique do you recommend? Lets assume two scenarios:
  There are multiple loaders on the page...
  a.) using a single GIF picture
  b.) using more GIF pictures</p>