Google maps get_bounds event triggered multiple times

I’m using V3 of the Google maps javascript api to bring in more markers as the map bounds are changed. The problem is that when I drag the map around for a while and then end dragging a flood of events are triggered at once. They appear to be queueing up while the map is being dragged.

Is there some way I can add a timer to stop this or will I have to use the zoom_changed and dragend events as a workaround?

Here is the relivant code:

google.maps.event.addListener(map, 'bounds_changed', function() {
  var bounds_url = map.getBounds().toUrlValue();
  $.ajax({
    //...
  });
});

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