[OpenLayers-Users] Performance Tuning in Internet Explorer

[jim.meyer at concept-solutions.com]

Hi,

 

   We are rendering a vector layer that has 1000+ shapes.  Currently, it is
very slow in IE.  Any ideas as to where to start to improve performance?

 

   The code that is being used to render this layer is below:

 

   shapeStore.on('load', function(ds){                                     

              

          timeStore.loadData(shapeStore.reader.jsonData);

              

          // Build the array of points

       for (var i = 0; i < shapeStore.getCount(); i++) {

         pointsArr.length = 0;

         pointArr.length = 0;

         theArr.length = 0;

         theArrIdx = 0;      

          pointsArr =  shapeStore.getAt(i).data.geom.split(",");   

          shapeStyle = shapeStore.getAt(i).data.style;           

          for (var x = 0; x < pointsArr.length; x++) {

            pointArr = pointsArr[x].split(" ");          

            theArr[theArrIdx++] = new
OpenLayers.Geometry.Point(pointArr[0],pointArr[1]);                

          }

           

          var theLinearRing = new OpenLayers.Geometry.LinearRing(theArr);

                 

             var thePolygon = new
OpenLayers.Geometry.Polygon(theLinearRing);

         

             var theAttributes = {

                   airspace_name: shapeStore.getAt(i).data.airspace_name

             }

                

             var theFeature = new
OpenLayers.Feature.Vector(thePolygon,theAttributes,eval(shapeStyle));

                           

             shapes_layer[0].addFeatures([theFeature]);

       }

       

       // Update the Map Time

       var theDateSpan = document.getElementById('thedate');

       theDateSpan.innerHTML = timeStore.getAt(0).data.thedate + ", " +
timeStore.getAt(1).data.thedate;

    

       });

       

       shapeStore.load();

 

Thanks,
Jim

 

Jim Meyer

Java Programmer

ConceptSolutions, LLC

    We Make Business Intelligent

703.889.8434 [desk]

703.391.9041[fax]

www.Concept-Solutions.com

 

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