more annotations and performance

I am trying to build an application with multiple charts on one screen (3) and each chart annotated with 20-25 annotations.
In total I have 6 FastLineRenderableSeries at once – 2 per chart.
I found serious performance issues after adding more than 10 annotations.

When a user presses a key I go to another set of data. Annotations are created on each data change. I create temporary collection and assign it to the surface annotations collection at once. I also suspend updates through Viewport Manager.

Creation of annotations does not seem to affect the performance, but the rendering of them does.

Most of them are derivatives of AxisMarkerAnnotation and apply a different label template. I tested adding standard Text Annotations instead, just to see whether the custom template had to do something with the performance drop, but it was more or less the same case.
The custom templates are also really simple, it is either a text block or a filled shape, always one component.

Do you have any advises for using a bigger number of annotations?
How to make their rendering faster?

When I remove all annotations the “scrolling” of data goes really smooth.

I am running out of ideas of how to improve.

Best regards,
Paulina

PS Is there any way to try out the other renders before buying a license?