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Normal Topic Questions about performance (Read 2295 times)
chowy
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Questions about performance
Aug 31st, 2017 at 1:44am
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I built a new project, I am empty map, the mouse's rapid movement, cpu occupancy rate reached 20%. Then our own project, cpu also reached 40%. When GroupNode (attachNode 13) reaches 100, the selected or all selected will be significantly slower. As well as some other graphics operations will slow down. I see performance analysis, there are a lot of external code execution cpu occupancy rate is very high!The current performance can not meet our project requirements. Do you have any good performance optimization or optimized demo?
  
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Slavcho
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Re: Questions about performance
Reply #1 - Aug 31st, 2017 at 5:22am
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Rapid mouse movement sends a lot of messages through Windows message pump which WPF translates to events, so the CPU gets involved. By waving the mouse around I can get CPU over 50% with any application that tracks mouse movements, e.g. like the forum's browser window as shown in screenshot. You could still reduce mouse-movement related processing by turning-off properties that do hit-testing to highlight objects, like ShowAnchors=Auto and ModificationStart=AutoHandles.

For other performance related discussions follow the links here -
https://mindfusion.eu/Forum/YaBB.pl?num=1442997646/1#1
« Last Edit: Aug 31st, 2017 at 8:18am by Slavcho »  
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Slavcho
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Re: Questions about performance
Reply #2 - Sep 7th, 2017 at 5:59pm
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Regarding selection, it should be faster if you set diagram.SelectionOnTop = false. It's enabled by default, leading to re-sorting WPF's visual tree to bring selected items to front, which gets slow when there are a lot of elements in the diagram.

Regards,
Slavcho
  
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