I suspect that your analysis of what's happening is flawed, because MarkerManager can only ever call map.removeOverlay() on the markers that are currently addOverlay()ed. You won't have all 1500 markers all addOverlay()ed at the same time because MSIE would grind to a halt when you tried to addOverlay() them, since addOverlay() requires far more processing than removeOverlay().
-- Mike Williams http://econym.org.uk/gmap -- You received this message because you are subscribed to the Google Groups "Google Maps API" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-maps-api?hl=en.
