title: Use custom icons with canvas rendering leaflet
body: <p>I need to draw thousands of points on a leaflet map with custom icons. The performance using the standard L.marker is too slow to be usable when I get to around 1500 markers. I attempted the solution <a href="https://stackoverflow.com/questions/9879597/leaflet-js-draw-pois-as-canvas">here</a> using L.circleMarker, and I am able to draw thousands of points with stellar performance. Unforunately, with using L.circleMarker I am only able to make different kinds of circles, which does not satisfy my requirements. I am also not able to leverage clustering, since there isn't a particularly good way to cluster these unrelated markers with different icons.</p>
  
  <p>Is there a way to get the performance benefits of canvas rendering while being able to use custom icons?</p>