Display Real-time data

 We are using Infragistics (version 13.1.20131.2204) xamDataChart to present our real-time data.

We limited the number of points to display in chart to 1000 for each series and maximum 6 series, so total maximum points will be displayed are 6000.

We noticed that If I use CategoryDateTimeXAxis its slow down the performance and tried with CategoryXAxis and found that significant improvement. So we decided to stick with CategoryXAxis to represent the time. We have a requirement from our customer that he wants to display vertical line (indicates the date time) along XAxis when he load the historical data. The vertical time line shoud move along the xAxis automatically when time changes. We found the solution for our requirement from  http://ko.infragistics.com/community/forums/p/75441/381189.aspx#381189, To achieve that XAxis should be CategoryDateTimeXAxis, we are ready to move to CategoryDateTimeXAxis  from CategoryXAxis.  But we would like to know why CategoryDateTimeXAxis not performing good when compared to CategoryXAxis with date time data (frequent data update).  

 What would you suggest to update the real time data in our scenario?

  Thanks