Tree widget - slow when heavily populated?

[Filip Pavlin <fp...@pinnacle.com.au>]

Hi,

 

I just recently added the cocoon tree widget to our application (which I’m
populating dynamically with data from a database) and everything is working
fine (I’m using cocoon-2.1.9, jdk1.6, tomcat-5.5.17 on Win XP).

However, I noticed that the opening of a node takes significantly longer
(even if there’s only one child-node underneath) if there are lots of nodes
already displayed (with ‘lots of node’ I mean many hundreds or even more).
The opening of the same node takes much less time if I minimize the number
of open nodes.

 

To illustrate this:

 

|

|---|

|   |---

|   … (hundreds of open nodes)

|   |---

|

|---|      <-- opening node with only one child takes about 10s

|

 

 

|

\

|

|---|      <-- opening same node as above (with only one child) takes about
1s

|

 

 

 

Has anyone observed this kind of behaviour? Is that an expected behaviour?

Apart from the tree population (which as I mentioned is happening
dynamically) everything else is implemented pretty much in the same way as
the tree samples provided with cocoon-2.1.9.

 

 

Thanks for your time.

 

Filip

 


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