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

[realjax]

Try destroying them as well on the markers layer

If you just want to get rid of all markers on the marker layer it should be:

localizationLayer.destroy()

(assuming localizationLayer is of type  OpenLayers.Layer.markers )

The problem might be in the fact that the removeMarker makes use of
OpenLayers.Util.RemoveItem, which in turn removes elements from an array
using the array.splice method. And IE 6 doesn't support this..



Eric Lemoine-3 wrote:
> 
> I also did observe memory leaks with the markers layer a while back.
> Some correction even made it into trunk but it didn't solve the
> problem entirely. Why dont you open a ticket with an example
> demonstrating the problem? Regards. Eric
> 
> 2008/8/7, lukast <lukast at poczta.fm>:
>>
>> 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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