gwtchosen widget is so slow in debug mode

[July-G]

I tried gwtchosen widget, i.e. ChosenListBox, which is so slow in debug mode, i tried the demo but behavior is not good too. Someone else who met this problem too?

I didn't try the gwtquery version yet.
BTW i on Win7 with 8GB RAM, 2.2G CPU, GWT 2.5.0-rc1 and Chrome 22

[July-G]

Using Firefox 15 to debug the speed is acceptable, and after compile the speed is good. so just close this problem.