title: Fetching HTML data to load pages faster - Opera Turbo
body: <p>I've discovered a pretty cool function on Opera which is fetching data on website, it shows lower resolution images and things like that and page loads fast. This is great for slow connections.</p>
  
  <p>I'm interested in the background of this little function, with my basic knowledge of CSS, HTML and Javascript I don't understand how this can be done. Can anyone explain how does it work?</p>
  
  <p>I mean let's say for images, it needs to download the image first and then convert it to lower resolution one so where do we "win" time here? Image is still being downloaded right?</p>