create a check box tree (tri state) with
4-5 levels of depth
~20 elements per level evenly distributed (till we have 10K leafs)
- expand the tree 1 level and maybe from second level just one node
- select the top most node.
at this moment the web page will freeze and it will stay like this for a good amount of time (~2-5 min) till the node is being selected/checked.
google chrome (Version 26.0.1410.33 beta-m) but it happens in other browsers as well windows 7 x64
8 GB of ram
this are the options witch i have enabled on the tree: