LightningChart Support Forums

Hi,
I would like to ask if there is any performance difference between using PointLineSeries and FreeformPointLineSeries.
I need to draw lines, that have x-coordinates that go up and down and sometimes, PointLineSeries has problems with it.

So I am wondering, if it is worth the effort to use appropriate series for each case, or I can just use Freeform for all cases.

Thanks

Hi,

LightningChart has three types of point-line series: SampleDataSeries, PointLineSeries and FreeformPointLineSeries (see User’s Manual chapter 5.5-7). They are different in a way x-value progressing. SampleDataSeries has strict interval, therefore, storing value is more compact and rendering time is very fast. In contrast, FreeformPointLineSeries have no constrains, therefore, more heavy to render (especially with high data count). The PointLineSeries is in between of those two case, as it have some constrain (x-value should increasing, although not at regular interval).
In summary, please choose Series based on expected data type, because flexibility and rendering speed are mutually exclusive.

In addition, all kind of interaction (point tracking, mouse hit test etc.) is faster in series with more constrains (i.e. not FreeformPointLineSeries).

All the best.