Performance degradation in the flex function expandItem()

Hello All,

We are seeing a performance degradation in the flex function expandItem() (compared to flash) when we iterate a list with a huge count (5000+ items). It takes around 30min for an array size of 5000 nodes and ~2min for 1000+ nodes. Hence browser shows the state as hanging but internally it is looping through the children (if we wait for a few minutes, it will get loaded for 1000+ nodes but not support 5000+ though). Internally it goes to list iteration and we believe that is causing this issue.

Can this be looked into for the next release as a priority?

Thanks,
Bharath