Hi Marc, thank you very much for your attention. The test is very simple:
in jsp: invke the map throughout servlet: map = new OpenLayers.Map( 'map' ); layer = new OpenLayers.Layer.WMS( "SampleWMS", "OpenlayerZoomMultipleInvoke",//invoke the serlvlet {layers: 'sea_ice_concentration_02'}, {singleTile: true} int the servlet: I catch the parameter (getParameter layer, bbxo, etc...) and load the rul, for example: url = server + request.getParameter("BBOX") + ....; and print a message: System.out.println("invoke the map"); The message is print 2^n times (n = #zoom), ie: zoom=2 => message print 4 times...zoom=4=>16 times... Thanks, Marck -- View this message in context: http://n2.nabble.com/Multiple-invoke-by-zoom-very-bad-performance-tp4595600p4597953.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users