DownSampling performance issues

[msureja]

Hi

We are using Tchart license with source code (license number 14050297).

We have a lot of mouse interaction with chart. The ammount of Datapoints used to draw the chart is also huge of the order of 100000 points.
We are using downsampling to reduce size of rendered points. But the use of downsampling is giving a performance hit. We tried to profile this and found that most of the time is spent in the line "this.Chart.Bitmap();" inside "AddPoints" function of "DownSampling" class.

Can you please suggest some solution or probable cause of this issue.
Can we get rid of this function call.

Regards
- MS

[Sandra]

Hello msureja,

You can remove "this.Chart.Bitmap();" but in more cases not works fine. For example if you see the demo "All Features\Welcome !\Functions\Extended\Reducing number of points\DownSampling Additions", when you remove this call and do unzoomed the functiont not recalculate correctly until repaint Chart.

Also, If you want to send us a simple example we can run "as-is" we try to optimize it. You can either post your file at news://www.steema.net/steema.public.attachments newsgroups or at our upload page. Now, also you can upload attachment allowed the post.

Thanks,