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

[Zac Spitzer]

logged in trac

http://trac.osgeo.org/fusion/ticket/400

On 15 July 2010 12:17, Paul Spencer <pspencer at dmsolutions.ca> wrote:
> 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/
>
>



-- 
Zac Spitzer
Solution Architect / Director
Ennoble Consultancy Australia
http://www.ennoble.com.au
http://zacster.blogspot.com
+61 405 847 168