How to improve WinForms MSChart performance?

Posted by Marcel on Stack Overflow See other posts from Stack Overflow or by Marcel
Published on 2010-03-26T09:13:57Z Indexed on 2010/03/26 10:23 UTC
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Hi all,

I have created some simple charts (of type FastLine) with MSChart and update them with live data, like below:

MSCharts Level Chart.

To do so, I bind an observable collection of a custom type to the chart like so:

                // set chart data source
            this._Chart.DataSource = value; //is of type ObservableCollection<SpectrumLevels>

            //define x and y value members for each series
            this._Chart.Series[0].XValueMember = "Index";
            this._Chart.Series[1].XValueMember = "Index";
            this._Chart.Series[0].YValueMembers = "Channel0Level";
            this._Chart.Series[1].YValueMembers = "Channel1Level";

            // bind data to chart
            this._Chart.DataBind(); //lasts 1.5 seconds for 8000 points per series

At each refresh, the dataset completely changes, it is not a scrolling update!

With a profiler I have found that the DataBind() call takes about 1.5 seconds. The other calls are negligible.

How can I make this faster?

  • Should I use another type than ObservableCollection? An array probably?
  • Should I use another form of data binding?
  • Is there some tweak for the MSChart that I may have missed?
  • Should I use a sparsed set of date, having one value per pixel only?
  • Have I simply reached the performance limit of MSCharts?

From the type of the application to keep it "fluent", we should have multiple refreshes per second.

Thanks for any hints!

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