DADevi Aruna Maharasi Murugan Syncfusion Team August 2, 2016 10:58 AM UTC
Thanks for contacting Syncfusion Support.
For each data point an UIElement is generated for the adornment, due to this while having more number of points, the performance degradation occurs. If your requirement is to display only symbols in adornment, we recommend you to use "FastScatterBitmapSeries" to get better performance. We have modified your sample and it can be downloaded from below link