title: Three.js interleaved geometry type
body: <p>I was looking into performance optimizations.
  In the current time I use <code>BufferGeometry</code> for my models, but found interesting demo with interleaved geometry type, which gives much more FPS.</p>
  
  <p>In test with 150k cubes, the results are:</p>
  
  <ul>
  <li><a href="http://benaadams.github.io/three.js/examples/webgl_interleavedbuffergeometry.html" rel="nofollow">Interleaved BufferGeometry</a> - 45fps</li>
  <li><a href="http://alteredqualia.com/three/examples/webgl_buffergeometry_perf2.html" rel="nofollow">AlteredQualia BufferGeometry</a> - 20fps</li>
  </ul>
  
  <p>What is the main difference between them ?</p>