Hello, 

The XtraChart contain only 1000 points but the CPU is getting pegged at 99%

How can I perform it ?

Hello,

These are point markers which affect the performance so significantly. So, you can either turn off line markers, or even use a special light-weight Swift Plot series type. Hope this helps you.

Thanks for your response.

It seem perfect, but the graphe need to show a tooltip when the mouse is over a point.

Could you say me, how can I do with the Swift Plot ?

Hello,

Much of the Swift Plot functionality is spent to maintain high performance. In particular, it doesn't support series points' hit-testing. So, in order to solve this task, you need to employ a common Line series, and use the approach shown at http://www.devexpress.com/example=E126. With point markers turned off, it should work fast.