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Anshul
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Performance Issue
Jan 29th, 2010 at 4:03pm
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Hi Stoyan,

In our diagram we have added 2048 ShapeNodes in two columns(1024 nodes in each column).

While rendering, it is taking approx 12-15 sec to render all the nodes on the diagram.

Please suggest us the appropriate solution to overcome this performance issue.

Regards,
Anshul
  
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Stoyo
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Re: Performance Issue
Reply #1 - Jan 29th, 2010 at 4:54pm
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Hi,

This takes about two seconds on my system -

diagram.UndoManager.UndoEnabled = false;
diagram.AutoResize = AutoResize.None;
diagram.SelectAfterCreate = false;

diagram.BeginInit();
for (int i = 0; i < 1024; ++i)
{
     var node1 = new ShapeNode();
     node1.Bounds = new Rect(0, i * 40, 30, 30);
     diagram.Nodes.Add(node1);

     var node2 = new ShapeNode();
     node2.Bounds = new Rect(60, i * 40, 30, 30);
     diagram.Nodes.Add(node2);
}
diagram.EndInit();

I hope that helps,
Stoyan
  
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Anshul
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Re: Performance Issue
Reply #2 - Jan 31st, 2010 at 1:10pm
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Hi Stoyan,

1). we are creating nodes by this way

Code
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ShapeNode mainNode = new ShapeNode(diagram);


and after this, we are attaching subordinate nodes by this way

Code
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labelNode = diagram.Factory.CreateShapeNode(
			     mainNode.Bounds.X + mainNode.Bounds.Width + 10, mainNode.Bounds.Y - 8 + (mainNode.Bounds.Height / 2),
			     500, 20);


Now suggest where we need correction to improve the performance.

2). When we have 1024 nodes in a single row, they are partially overlapping each other but if decrease the count to 200-300 then they have some finite distance. How to overcome this?

3). Can we apply virtualization? If yes, how can we apply?

Regards,
Anshul
  
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Stoyo
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Re: Performance Issue
Reply #3 - Feb 1st, 2010 at 9:00am
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Hi,

1. Are there 1024 groups like this, or 2048?

2. What code are you using to arrange the row?

3. There's no built-in virtualization support. If all nodes are in a row or a column, you could create only a few of them, do not use a scrollviewer but add a separate scrollbar that only changes the nodes content and updates the visible links to represent a different range of the graph.

Stoyan
  
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