title: Why is getCount called so many times in PagerAdapter?
body: <p>I noticed today that the PagerAdapter gets called a large amount times. I counted 393 when scrolling pages slowly. I saw <a href="https://stackoverflow.com/questions/13562828/why-does-getcount-in-adapter-is-being-called-so-many-times">this question</a> but it didn't really provide me with a good answer. </p>
  
  <ol>
  <li>Is this normal behaviour</li>
  <li>If so, why is it that the getCount method is called so often?</li>
  </ol>
  
  <p>Just to be clear, I am looking for a more extensive answer then the one in the provided question. 
  I do also realize that I need to keep it as fast and that I have no control over how it is called, but that is not the question here.</p>