Hi,
Thanks for your interests in Syncfusion products.
Following options can be done for having a better performance with chart.
1. Use BeginUpdate and EndUpdate method of ChartSeries before and after the data points are added. This is very effective when bulk inserts are made to the collection.
2. Data virtualization can be done. If you are having a live chart, values that are not required can be removed from the collection. Please refer to the sample in the following location.
http://www.syncfusion.com/development/uploads/CS_21061d98.zipPlease let me know if it works.
Regards,
Athaur Rahman GS