title: New Google Maps Symbol object in Marker makes IE really slow
body: <p>I'm testing the new Symbols object of the Google Maps V3 API. I have set every "icon" attribute of 400 markers with the same Symbol path and color.</p>
  
  <p>When look at the sample page with Firefox or Chrome, everything loads fast and works great. </p>
  
  <p>Unfortunately... the performance in Internet Explorer are really bad. Bad at loading time and also when I try to drag or zoom on the map.</p>
  
  <p>Here is a simple javascript example which you can use to test on IE</p>
  
  <pre><code>  var map;
    function initialize() {
      var mapDiv = document.getElementById('map-canvas');
      map = new google.maps.Map(mapDiv, {
        center: new google.maps.LatLng(37.4419, -122.1419),
        zoom: 13,
        mapTypeId: google.maps.MapTypeId.ROADMAP
      });
  
      google.maps.event.addListenerOnce(map, 'tilesloaded', addMarkers);
  
    }
  
    function addMarkers() {
      var bounds = map.getBounds();
      var southWest = bounds.getSouthWest();
      var northEast = bounds.getNorthEast();
      var lngSpan = northEast.lng() - southWest.lng();
      var latSpan = northEast.lat() - southWest.lat();
      for (var i = 0; i &lt; 400; i++) {
        var latLng = new google.maps.LatLng(southWest.lat() + latSpan * Math.random(),
                                            southWest.lng() + lngSpan * Math.random());
        var marker = new google.maps.Marker({
          position: latLng,
          icon:{  
              path: google.maps.SymbolPath.CIRCLE,
              fillOpacity: 1,
              strokeWeight: 0,
              scale: 4
           },
         map: map
        });
      }
    }
  </code></pre>
  
  <p>When you use it with some extra attributes and events it gets worst! But if you just delete the "icon" attribute of the marker, the basic Google marker appear and everything goes as fast as Chrome and Firefox...</p>
  
  <p>Does anybody have an answer why this is that slow on IE when using Symbol and how can I speed up the process. </p>
  
  <p>Thanks!</p>