Steema Central

Dear all,

I am currently evaluating the TeeChart for .NET and am using the trial version 2.0.2040.15118.
As a user of TeeChart VCL v5.02, we are looking to migrate from Borland development to VS 2003.

We are using realtime charting and speed is realy a top issue. As this is no problem with the VCL version, it is with our .NET trial version.
Short explanation : we created a small assembly Calculator, in which some simulations take place and results are given to the outside world by using events or callbacks.
In the main application, I start a thread in which the routines of the Calculator assembly are started and results are shown in a plot window (using an eventhandler).
The results are surprising : in the VCL version, only 10 seconds, and with the .NET version 60 seconds to finish all the calculations. I have tried to set all valuable properties for realtime charting, but nothing changes the charting speed. When plotvalues are not displayed, the calculations take only 9 seconds to finish.
I compare only TLineSeries, and I know that TFastLineSeries is a little bit faster.

Is this issue releated to the combination of using threads and TeeChart or only to TeeChart ?

Thank you for your information and I hope to place an order soon.

Hello Da Vinci,

As I'm sure you are aware, GDI+ is slower than GDI and I would imagine this factor is an important one (you may want to read the following thread on the subject http://tinyurl.com/8f3um).

We have optimized TeeChart's painting routines as much as possibly without the use of unsafe code (pinvoke/pointers) and we are considering the creation of an unsafe GDI canvas which would be available as a separate assembly (as the OpenGL canvas is).

If you would like to create a test project for us to highlight the speed problems you are experiencing we will be happy to look at it for you. Please post it to:
news://www.steema.net/steema.public.attachments