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Normal Topic Complex flowcharts are too slow (Read 6262 times)
sbailey
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Complex flowcharts are too slow
Jul 27th, 2010 at 3:10pm
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We've got a use case here where a ton of arrows are going out from a ton of table rows to a ton of tables, and setting up a flowchart in this state takes forever.

I've even disabled routing on the flowchart class.

Is there anything else that can be done to make AddRelation( ) not take so long?
  
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Stoyo
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Re: Complex flowcharts are too slow
Reply #1 - Jul 27th, 2010 at 3:24pm
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Like how many of each exactly? If you are using undo/redo, you could disable it before creating all objects and only enable it after that.
  
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sbailey
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Re: Complex flowcharts are too slow
Reply #2 - Jul 27th, 2010 at 3:31pm
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Probably thousands of arrows. I'm not using the undo functionality, but it's possible it's still enabled.
  
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sbailey
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Re: Complex flowcharts are too slow
Reply #3 - Jul 27th, 2010 at 3:38pm
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Didn't make a difference.
  
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Re: Complex flowcharts are too slow
Reply #4 - Jul 27th, 2010 at 4:36pm
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What other code is running apart from creating the objects? E.g. 500 tables and 2000 arrows were created without delay in my test, with all settings at their default values:

Code
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Private Sub btnTest_Click()
	Dim i As Integer
	For i = 0 To 399
		fcx.CreateTable (i Mod 20) * 80, (i \ 20) * 160, 40, 80
	Next i
	For i = 0 To 1999
		fcx.CreateRelation fcx.tables(i Mod 400), i Mod 2, fcx.tables((i + 50) Mod 400), i Mod 2
	Next i
End Sub
  
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sbailey
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Re: Complex flowcharts are too slow
Reply #5 - Aug 5th, 2010 at 1:02pm
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I'll do some diagnostics and find out. You're adding all the tables at once and then creating all the relations, which might make a significant difference. Perhaps I can queue the arrow setup.
  
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sbailey
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Re: Complex flowcharts are too slow
Reply #6 - Aug 5th, 2010 at 8:07pm
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By turning off autorouting and using CreateRelation instead of the table's AddRelation function, I was able to get things to be a manageable speed. In fact, even with autorouting on, CreateRelation was significantly faster than AddRelation.
  
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Re: Complex flowcharts are too slow
Reply #7 - Aug 6th, 2010 at 7:48am
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AddRelation just checks the ERelation value and calls CreateRelation with source and destination set to the respective tables. If you got any speed improvement, it should come from the order in which items are added or from different RoutingOptions values.

Indeed adding a new table will lead to running the routing algorithm for all arrows in the vicinity, so adding the tables first before any arrows will be faster than adding the items in random order.

Stoyan
  
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