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Hot Topic (More than 10 Replies) Scroll link tables slow down the performance. (Read 9418 times)
Mrini
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Scroll link tables slow down the performance.
Oct 7th, 2009 at 7:45am
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Hi,

I am using LinkTables for source and destination row mappings.

Both the tables contain huge data and the number of links.


I scroll the table on MouseWheelListener event and set the current row of the table using tableNotde.setCurrentRow().

It works perfect for small data but gets hang for a second for large data.

It seems the row is getting set but the diagram doesn't get refresh faster.

For huge data with no links it works faster.

How can I improve the scrolling

Thanks.
« Last Edit: Oct 7th, 2009 at 9:24am by Mrini »  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #1 - Oct 7th, 2009 at 10:22am
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Hi,

Are you using link auto-routing? It might slow-down scrolling if there are a lot of links connected to the tables.

Stoyan
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #2 - Oct 7th, 2009 at 10:51am
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Hi Stoyan,

   Yes there are lot of links between the two tables.

Is there any way to improve the performance of tableNode.setCurrentRow()  in such a case?
  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #3 - Oct 7th, 2009 at 10:58am
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If using auto-routing, you could disable it and call the Route method only for links that are within the currently visible range of table rows.
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #4 - Oct 7th, 2009 at 12:51pm
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Hi Stoyan,

         I am not using auto-routing.
  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #5 - Oct 7th, 2009 at 1:50pm
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Are you using the LinkCrossings property? It does a lot of calculations too.
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #6 - Oct 7th, 2009 at 2:21pm
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Nope,

I am using only following properties.

diagram.setAllowSelfLoops(false);
diagram.setDynamicLinks(true);
diagram.setRestrictItemsToBounds(RestrictToBounds.InsideOnly);
diagram.setSnapToAnchor(SnapToAnchor.OnCreateOrModify);
  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #7 - Oct 8th, 2009 at 7:35am
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So how many links are there? Could you email the diagram xml to support@mindfusion.eu?
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #8 - Oct 9th, 2009 at 5:37am
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Hi Stoyan,

     Near about 6000 links are there.

     I can not send the xml as I am populating links through ArrayList manipulations.
  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #9 - Oct 12th, 2009 at 12:24pm
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We tried some optimizations, but the speed with 6000 links improved only slightly:
https://mindfusion.eu/_beta/jdiag_scrolltbl.zip

It might get a bit faster also if you disable the Dynamic property of links, and hide their arrowheads.
  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #10 - Oct 12th, 2009 at 12:41pm
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Additionally, didn't you have some code that hides links that are not in the currently visible range of rows? For best performance, you could change that to create / remove links, instead of show / hide them.
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #11 - Dec 29th, 2009 at 12:53pm
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Hi Stoyan ,

Remove and redraw links works perfect for performance issue rather than show / hide.

thanks . Smiley


But now another issue arise.

For calculating the row hight for rows in a linktable for fixed width I'm first setting the text to ShapeNode , assigning the width and applying the property shapeNode.resizeToFitText(FitSize.KeepWidth);

then assigning that ShapeNode hight to a row.

It works fine for normal text ,  but for chinise text it takes lot of time to set the text to shapeNode and resize it.

so for 7000-8000 rows it takes 30-40 mins to calculate the row hight whereas for normal text it takes 1 min.

Can you please help me out.

thanks.
 

  
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Stoyo
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Re: Scroll link tables slow down the performance.
Reply #12 - Dec 29th, 2009 at 4:23pm
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Could you save one such table with Chinese texts to an xml file and email it to support@mindfusion.eu?
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #13 - Jan 7th, 2010 at 5:20am
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Hi Stoyan.

    I resolved the issue using JTextArea instead of Shapenode.

Anyways Thanks for the quick response.
Smiley
  
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Mrini
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Re: Scroll link tables slow down the performance.
Reply #14 - Mar 25th, 2010 at 8:17am
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Hi Stoyan,
     I am facing the same issue again of calculating the row height for wrapping the text into a linktable cell as JTextara doesn't work well on Linux.

I need to use shapnode for the height calculation but the issue with shapnode is it take time to render chinese text.

Is there any other way for height calculation or how can I improve the performance using shapnode.

Sorry, you requested for xml file but I could not send as I am not able to save it to xml due to some jar conflicts.

Thanks.
  
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