[fusion-dev] Re: Recursion issue? with the legend updates

[Paul Spencer]

Hey Zac

the next version of fusion/jxlib that Mike has been working on has a more reasonable approach to populating the tree to accommodate this kind of situation (although I'm still not sure it would handle your case that gracefully ;)).  I don't believe that we looked at delaying the actual insert, I should go back and see if we can gain some performance by setting a flag that says don't insert the tree, just build it.  I know that the found the style updates excessive and added a freeze/thaw rendering pattern to prevent updates to the whole tree on every insert and that proved to be a huge performance gain.

Cheers

Paul


On 2010-07-14, at 9:46 PM, Zac Spitzer wrote:

> Ok, I found what was causing the issue... a database generated theme
> had 891 layers which is obviously a bit ridiculous...
> 
> the lock up was being caused by excessive dom inserts and style updates
> 
> a solution to this would be to make all the style elements just one block
> and insert that once, rather than a theme at a time. I'm not familiar with JX
> enough to know if that's possible
> 
> 
> 
> 
> 
> 
> On 14 July 2010 18:06, Zac Spitzer <zac.spitzer at gmail.com> wrote:
>> I am working thru an issue with a map i have, using the mapguide 2.2 beta
>> at the moment.
>> 
>> Basically when i drop below the scale of 20k, the browser will lock up
>> for upwards
>> of 35-60 seconds in the update legend.js code.
>> 
>> So far after some profiling pain, i have worked out that commenting out the
>> line below stops the problem
>> 
>>    _update: function() {
>>            //this.updateGroupLayers(map.layerRoot.groups[i], currentScale);
>> 
>> I will continue my digging to see if I can work out what is causing the issue.
>> 
>> Looks like some kind of nasty recursion or something
>> 
>> Thought I'd touch base to see if anyone else has seen this
>> 
>> regards
>> 
>> z
>> 
>> 
>> 
>> 
>> --
>> Zac Spitzer
>> Solution Architect / Director
>> Ennoble Consultancy Australia
>> http://www.ennoble.com.au
>> http://zacster.blogspot.com
>> +61 405 847 168
>> 
> 
> 
> 
> -- 
> Zac Spitzer
> Solution Architect / Director
> Ennoble Consultancy Australia
> http://www.ennoble.com.au
> http://zacster.blogspot.com
> +61 405 847 168
> _______________________________________________
> fusion-dev mailing list
> fusion-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/fusion-dev


__________________________________________

   Paul Spencer
   Chief Technology Officer
   DM Solutions Group Inc
   http://research.dmsolutions.ca/