I have a chart with 500 items in it and it has significant performance issues. It takes about 10 seconds to render the series data to the screen. Resizing or scrolling the chart also causes a 10 second delay.
<charts:SfChart Grid.Column="0" Grid.Row="1"
AreaBorderThickness="0">
<charts:SfChart.Behaviors>
<charts:ChartZoomPanBehavior
ResetOnDoubleTap="False"
EnableMouseWheelZooming="False"
EnableSelectionZooming="False"
EnablePinchZooming="False"
EnableZoomingToolBar="False"
ZoomMode="X"
EnablePanning="True" />
</charts:SfChart.Behaviors>
<charts:SfChart.PrimaryAxis>
<charts:DateTimeCategoryAxis
ShowGridLines="False"
ZoomPosition="1"
ZoomFactor="{Binding ZoomFactor}"
LabelFormat="dd/MM/yy HH:mm"
Interval="1"
Style="{StaticResource ChartAxisXTextStyle}"
LabelRotationAngle="-30"
TickLineSize="0"
AxisLineStyle="{StaticResource ChartAxisLineStyle}"
FontSize="10"
EdgeLabelsDrawingMode="Shift" />
</charts:SfChart.PrimaryAxis>
<charts:SfChart.SecondaryAxis>
<charts:NumericalAxis
ShowGridLines="False"
Interval="1"
Style="{StaticResource ChartAxisYTextStyle}"
Minimum="{Binding MinYValue}"
Maximum="{Binding MaxYValue}"
TickLineSize="0"
AxisLineStyle="{StaticResource ChartAxisLineStyle}">
<charts:NumericalAxis.StripLines>
<charts:ChartStripLine
Opacity="0.3"
Background="{StaticResource AppGreenMediumBrush}"
Start="{Binding StripStart}" Width="{Binding StripWidth}" />
</charts:NumericalAxis.StripLines>
</charts:NumericalAxis>
</charts:SfChart.SecondaryAxis>
<charts:AreaSeries
ItemsSource="{Binding Observations}"
XBindingPath="ItemDate"
YBindingPath="Value"
Interior="{StaticResource AppBlueMediumLightBrush}" BorderThickness="0" />
<charts:LineSeries
ItemsSource="{Binding Observations}"
XBindingPath="ItemDate"
YBindingPath="Value"
Interior="{StaticResource AppPurpleBrush}"
StrokeThickness="1" BorderThickness="0">
<charts:LineSeries.AdornmentsInfo>
<charts:ChartAdornmentInfo
ShowMarker="True"
Symbol="Ellipse"
SymbolInterior="{StaticResource AppBlueMediumBrush}"
SymbolStroke="{StaticResource AppWhiteBrush}"
SymbolHeight="10"
SymbolWidth="10" />
</charts:LineSeries.AdornmentsInfo>
</charts:LineSeries>
</charts:SfChart>