[OpenLayers-Users] Re moved markers still occupy memory :/

[lukast]

Thanks for quick reply !

I have used png icons, but had image hack disabled:
OpenLayers.Util.alphaHack = function() { return false; } 
Now I converted my marker icon to gif, but unfortunatelly it did not help :/
Every time I add some markers memory increases (ok, that is normal), but
when I remove these markers from markers layer and then invoke destroy
method on ebery marker memory is not relesed :/
Maybe Marker.destroy() method does not work correctly ?




lukast wrote:
> 
> Hi,
> 
> I've got memory usage problem with OpenLayers 2.6 in IE 6. Memory seems to
> slowly but instantly increase when using the map. I am using Drip 0.5 to
> detect memory leaks - but it shows no memory leaks since I have installed
> Windows SP3.
> 
> Apart from this I have got another problem with memory usage connected
> with markers. I dynamically add several markers to the markers layer.
> Memory increases very fast when I add Markers - 20 Markers - aproximatelly
> 10MB of RAM :( 
> Also when I remove these markers from the map memory stays on the same
> level - but should be freed.
> Here is the way I add markers to the map this way:
> 
> //icon initialization - only once for all markers
> var iconSize = new OpenLayers.Size(20,20);
> var iconOffset = new OpenLayers.Pixel(-(iconSize.w/2), -iconSize.h);
> localizationIcon = new
> OpenLayers.Icon(icon.localizationIcon,iconSize,iconOffset);
> 
> //add single marker
> 
> var currentIcon = localizationIcon.clone();
> this.currentMarkers[index] = new OpenLayers.Marker(new
> OpenLayers.LonLat(poi.x,poi.y),currentIcon);
> 
> //add popup for this marker
> 
> this.currentMarkers[index].events.register('mouseover',
> this.currentMarkers[index], function(evt) { 
> 
> 			var contentDiv = "<div style=\"font-size: 12px;color:
> blue\">"+title+"</br>"+content+"</div>";
> 	
> 	var popup = new OpenLayers.Popup.Anchored("chicken", 
>                                          new
> OpenLayers.LonLat(poi.x,poi.y),
>                                          new
> OpenLayers.Size(250,60),contentDiv,currentIcon,false);
> 			searchManager.currentPopup = popup;
> 			localizationLayer.map.addPopup(searchManager.currentPopup,true);
> 			searchManager.currentPopup.show();
> 			OpenLayers.Event.stop(evt); 
> });
> this.currentMarkers[index].events.register('mouseout',
> this.currentMarkers[index], function(evt) {
> 			map.removePopup(searchManager.currentPopup);
> 			searchManager.currentPopup.destroy();
> 			searchManager.currentPopup = null;
> 			OpenLayers.Event.stop(evt); 
> 		});
> 
> //add new marker to the markers layer
> localizationLayer.addMarker(this.currentMarkers[index]);
> 
> 
> Removing markers looks like this:
> 
> for(i=0;i<this.currentMarkers.length;i++){
> 			localizationLayer.removeMarker(this.currentMarkers[i]);
> 			this.currentMarkers[i].destroy();
> }
> $(this.currentMarkers).clear();
> 
> What is wrong with that code ?
> 
> Appreciate any help.
> 
> Best Regards,
> lukast
> 
> 

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