Displaying a TreeGrid with a lot of expanded nodes takes for ever in the browser.
It looks like it’s trying to asynchronously expand ALL nodes, even those not displayed, which means that it can take minutes. And of course this steals almost all browser performance.
We do need to display large trees expanded to a user defined level.
Using server side collapseRecursively() and expandRecursively() is quick enough, so that’s not the problem.
Is there a way to avoid the client side lag?