Did any one else notice a slow down is Serialization from QueryTask from 2.2 to 2.3?

HyrumErnstrom

I first noticed it in a FeatureLayer. I then tested a QueryTask for the same features(1000+). It was fast when I didn't return geometry. Then when I switched to returning Geometry it was much slower in 2.3 than in 2.2. I finally switch the whole project to 2.2 and was back to the performance that I was expecting.

My client had thought it slowed down going to 2.2 from 1.x. Is this a progressive thing with each release the performance is getting worse?

JenniferNery

I'd like to reproduce this bug, what version of ArcGISServer are you using?

I have the following code, please let me know if it needs to be tweaked to get the same performance slowdown that you are experiencing. I will be testing it against latest and previous releases. Using the code below, I did not experience a slowdown between 2.1, 2.2. and latest. If you can share service and/or code, that would help us reproduce the bug and hopefully fix it. Thanks.

What I've noticed is that there seems to be no difference in server response for ReturnGeometry=True and ReturnGeometry=False using sampleserver3. I just learned that this is a known server bug that is planned to be fixed in future releases.

xmlns:esri="http://schemas.esri.com/arcgis/client/2009">

    <Grid x:Name="LayoutRoot" Background="White">
  <esri:Map WrapAround="True" x:Name="MyMap">
   <esri:ArcGISTiledMapServiceLayer ID="MyLayer"
                Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_Imagery_World_2D/MapServer" />
   <esri:GraphicsLayer ID="MyGraphicsLayer">
    <esri:GraphicsLayer.Renderer>
     <esri:SimpleRenderer>
      <esri:SimpleRenderer.Symbol>
       <esri:SimpleMarkerSymbol Color="Red" Size="15" Style="Circle"/>
      </esri:SimpleRenderer.Symbol>
     </esri:SimpleRenderer>
    </esri:GraphicsLayer.Renderer>
   </esri:GraphicsLayer>
  </esri:Map>
  <StackPanel VerticalAlignment="Top" HorizontalAlignment="Center">
  <Button  Content="Query" Click="Button_Click"/>
   <CheckBox x:Name="ReturnGeom" IsChecked="False"/>
  </StackPanel>
 </Grid>

DateTime started;
  private void Button_Click(object sender, RoutedEventArgs e)
  {
   var queryTask = new QueryTask("http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Earthquakes/EarthquakesFromLastSevenDays/FeatureServer/0")
   {
    DisableClientCaching = true
   };   
   var query = new Query() { ReturnGeometry = ReturnGeom.IsChecked.Value , Where = "1=1"};
   queryTask.ExecuteCompleted += new EventHandler<QueryEventArgs>(queryTask_ExecuteCompleted);
   started = DateTime.Now;
   queryTask.ExecuteAsync(query);
  }

  void queryTask_ExecuteCompleted(object sender, QueryEventArgs e)
  {
   var elapsed = DateTime.Now.Subtract(started).TotalMilliseconds;
   System.Diagnostics.Debug.WriteLine("Elapsed time (ms): {0}", elapsed);
   (sender as QueryTask).ExecuteCompleted -= queryTask_ExecuteCompleted;
   var l = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
   if (e.FeatureSet != null)
   {
    foreach (var f in e.FeatureSet.Features)
     l.Graphics.Add(f);
   }
  }

KrishnakanthYachareni_0-1650485112164.png