title: Performance test OpenLayers vs Leaflet
body: <p>I would like to compare the performance between OpenLayers and Leaflet.
  I want to test things like which is the fastest to render vector files, basemaps, show a massive amount of markers etc.</p>
  
  <p>I can set up this examples myself, but I don't how to actually measure the difference in speed between them?</p>
  
  <p>Where can I see how long it actually takes to perform a task like loading the vector data into a map?</p>
  
  <p>I tried to use the 'Timeline' tab in Chrome under developper console but it's not that clear to me.</p>
  
  <p>This an example of a map. Where can I see how long it takes to render the blue shapes? It's just a simple vector file.</p>
  
  <p><a href="https://i.stack.imgur.com/Dn5sE.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/Dn5sE.jpg" alt="A basemap with a vector layer on top of it"></a></p>