I forgot to mention that my results were with Internet Explorer 9. I measure the memory usage by reading the Windows process private bytes counter via WMI.
On Tue, Jun 11, 2013 at 7:49 PM, Mark Priest <[email protected]> wrote: > Hi, > > I am relatively new to Open Layers, but I think I am seeing a memory > leak when using Open Layers 2.12 with google maps v3 as a base map. > > I constructed two simple html files/apps which use the google maps v3 > api to provide a base map. In one file I use the google maps api > directly. In the other I use Open Layers and use google maps v3 as > the base layer. > > I created an automated test script (using AutoIT) to do a series of > mouse actions that cause the map to pan up and down and then left and > right for 15 minutes. I applied this test to both html apps and used > the same screen sizes and map center points. In my tests I see a leak > rate of about 100 mb/hr when using google maps v3 alone. When I use > Open Layers I see a leak rate of about 2000 mb/hr - or about 20 times > the rate of google maps alone. > > If I use the google maps v2 API I don't see a leak in either google > maps or Open Layers. > > Can someone please confirm if I am seeing an actual leak or if I am > simply doing something wrong with Open Layers? > > Here are the two html apps in full: > > > Google Maps v3 version: > > <html> > <head> > <title>Simple Map</title> > <style> > html, body, #map-canvas { > margin: 0; > padding: 0; > height: 100%; > } > </style> > <script > src="https://maps.googleapis.com/maps/api/js?v=3&sensor=false";></script> > <script> > var map; > function initialize() { > var mapOptions = { > zoom: 16, > center: new google.maps.LatLng(42.336898249865152, > -71.59534692764282), > mapTypeId: google.maps.MapTypeId.ROADMAP > }; > map = new google.maps.Map(document.getElementById('map-canvas'), > mapOptions); > } > > google.maps.event.addDomListener(window, 'load', initialize); > > </script> > </head> > <body> > <div id="map-canvas"></div> > </body> > </html> > > > Open layers Version (assumes that Open Layers 2.12 is in > ../lib/OpenLayers.js): > > <html> > <head> > <style> > html, body, #map-canvas { > margin: 0; > padding: 0; > height: 100%; > } > </style> > <title>OpenLayers Google (v3) Layer Example</title> > <script > src="https://maps.googleapis.com/maps/api/js?v=3&sensor=false";></script> > <script src="../lib/OpenLayers.js"></script> > <script> > var map; > function initialize() { > var mapOptions = {zoom: 16}; > map = new > OpenLayers.Map(document.getElementById("map-canvas"), mapOptions); > > var mapLayer = new OpenLayers.Layer.Google( "Google Map", > {type: google.maps.MapTypeId.ROADMAP} ); > > map.addLayers([mapLayer]); > map.setCenter(new OpenLayers.LonLat(-71.59534692764282, > 42.336898249865152).transform( > new OpenLayers.Projection("EPSG:4326"), > map.getProjectionObject()), 16); > } > </script> > </head> > <body onload="initialize()"> > <div id="map-canvas"></div> > </body> > </html> _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
