Checkbox tri-state it's too slow

[Bruno]

Hello,

I have a treeview with property checkChildren enabled, around 1.5k nodes and lots of divisions between parents and childrens, 
the load is slow, but click at first one it's just deadly slow, sometimes to broke the script

At this jsfiddle, have 990 nodes and check/uncheck the first one (test 10) takes 6 seconds or more to check all childrens

There is any work from Telerik/Kendo to improve this funcionality?

If not, now has my suggestion

Tri-state behavior is great and deserve receive some attention

Thank you very much

[Alex Gyoshev]

Hello Bruno,

If you need to maximize the performance in such cases, please specify loadOnDemand: true along the configuration options. We will profile the performance when all nodes are rendered, though the sheer amount of performed operations will always be slower than not rendering the nodes at all.

Kind regards,
Alex Gyoshev
the Telerik team