I'm try to work out what my expectations should be for speed of operation of the diagram component.

Base on forum help I am doing the following to construct my graph:
Add all containers/nodes
Add all links
Layout all containers
Layout diagram
Route all links

I'm using a LayeredLayout (because I think this best fits the data) with the following properties:

LayeredLayout layout = new LayeredLayout();
layout.Orientation = MindFusion.Diagramming.Wpf.Layout.Orientation.Vertical;
layout.Anchoring = Anchoring.Keep;
layout.LinkType = LayeredLayoutLinkType.Cascading;
layout.StableSort = true;
layout.LayerDistance = 50;
layout.NodeDistance = 50;
layout.IgnoreNodeSize = false;
layout.EnableParallelism = true;

I've used a stopwatch to time the various phases, which are as follows:

==== Adding [555] Nodes: 00:00:00.2420000
==== Adding [785] Connections: 00:00:02.5310000
==== Layout Containers: 00:00:01.2920000
==== Layout Main: 00:00:11.9470000
==== Reroute Connections: 00:00:00.2870000
==== Total: 00:00:16.3050000

So, total time is about 16 secs, with the worst offenders being adding connections, and main diagram layout.

Is there anything I can do to speed this up?
I can code fragments if that would help pinpoint performance issues.

Thanks,

Jim.

Thanks Stoyan.

I have made the changes to use BeginInit/EndInit and turned off validity checking.  Unfortunately, this has made no noticeable difference to speed of adding diagram elements.

Changing GrowToFit has also made no noticeable difference.

Turning on EnforceLinkFlow causes an ArgumentOutOfRange exception during the layout phase:

>      mscorlib.dll!System.Collections.CollectionBase.System.Collections.IList.get_Item
(int index) Line 106      C#
     MindFusion.Diagramming.Wpf.dll!MindFusion.Diagramming.Wpf.PointCollection.this[int].get(int index)      Unknown
     MindFusion.Diagramming.Wpf.dll!MindFusion.Diagramming.Wpf.Layout.LayeredLayout.K
L(MindFusion.Diagramming.Wpf.Diagram Q, System.Collections.IEnumerable V)      Unknown
     MindFusion.Diagramming.Wpf.dll!MindFusion.Diagramming.Wpf.Layout.Layout.Arrange(
MindFusion.Diagramming.Wpf.Diagram diagram, MindFusion.Diagramming.Wpf.DiagramItemCollection items)      Unknown
     MindFusion.Diagramming.Wpf.dll!MindFusion.Diagramming.Wpf.Layout.Layout.Arrange(
MindFusion.Diagramming.Wpf.Diagram diagram)      Unknown

Thanks,

Jim.

Thanks Stoyan.

Turning off AutoRoute has enabled me to turn on EnforceLinkFlow.  With these two modifications in place I get results of:
==== Adding [551] Nodes: 00:00:00.2550000
==== Adding [781] Connections: 00:00:02.8520000
==== Layout Containers: 00:00:01.2230000
==== Layout Main: 00:00:00.5790000
==== Reroute Connections: 00:00:00.3050000
==== Total: 00:00:05.2400000

If I also Suspend/Resume LinkRouter around populating the graph:
==== Adding [551] Nodes: 00:00:00.3030000
==== Adding [781] Connections: 00:00:01.6480000
==== Layout Containers: 00:00:01.0870000
==== Layout Main: 00:00:00.5400000
==== Reroute Connections: 00:00:00.3470000
==== Total: 00:00:03.9550000

That's a pretty good improvement!

Is there any thing else that I can do to make further improvements?

Thanks,
Jim.