[OpenLayers-Users] WMSGetFeatureInfo - slow response in IE8 and 9

[Zac Spitzer]

a few questions...

have you got any vector layers?
using fiddler the wms response time is the same?
is the wms request fired off late in IE?

On Sat, Mar 10, 2012 at 8:07 AM, David Miller <teknocreator at gmail.com> wrote:
> Good day all,
>
> We have MapServer 6.0.1 and OpenLayers 2.11 installed on our system.
> Following others' examples and some help from other lists, I was able to use
> OL's WMSGetFeatureInfo control to query a raster via MapServer's WMS option
> and have it return the values on a popup on the raster image at the point I
> clicked at.  With Firefox and Chrome, this works well as I receive a
> response within 2-3 seconds.  However, with IE 8 or 9, the response is very
> slow - 30-40 seconds.  And when I click on the map, it looks like nothing
> happens and I can still move the mouse around.  However, after the time I
> indicated, the mouse cursor may change to an hour glass or to the spinning
> circle that one sees when connecting to a web page (seems to depend on IE
> version).  Then the popup appears with the raster value at that point.
>
> Any ideas on what might be happening with IE and also perhaps how to fix?
>
> In case you'd like to see the control's code, I've included it below.
> However, like I said, this works well in Firefox and Chrome.
>
>     info =  new OpenLayers.Control.WMSGetFeatureInfo({
>
>                          url: "/cgi-bin/mapserv",
>                          maxFeatures: 1,
>                          title: 'Identify features by clicking',
>                          queryVisible: true,
>                          layers: [wmsmap],
>                          vendorParams: {
>
>                              map: "wxmap/glmpvis.map",
>
>                          },
>                          eventListeners: {
>                              getfeatureinfo: function(event) {
>                                  if (popup != null) {
>                                     popup.destroy();
>                                     popup = null;
>                                  }
>                                  popup=new OpenLayers.Popup.FramedCloud(
>                                          "chicken",
>                                          map.getLonLatFromPixel(event.xy),
>                                          null,
>                                          event.text,
>                                          null,
>                                          true
>                                  );
>                                  map.addPopup(popup); //map.addPopup
>
>
>                              } // getfeatureinfo
>                          } // eventListeners
>
>        });
>
>        map.addControl(info);
>        info.activate();
>
> Thanks for any suggestions/help!
>
> Dave M
>
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-- 
Zac Spitzer
Solution Architect / Director
Ennoble Consultancy Australia
http://www.ennoble.com.au
http://zacster.blogspot.com
+61 405 847 168