I am new to EXT JS GWT and GXT. My current client has an application that was written a few years ago using GWT 1.7.0 and EXT JS GWT 1.2.5. Sadly the code is poorly documented and I have had little luck locating any documentation related to EXT JS GWT 1.2.5. I was hoping someone out here could point me in the right direction.

The crux of the problem is that the application renders very slowly in IE8 browsers but renders at an acceptable level on IE7, IE9, Firefox and Chrome. I am thinking that there is a rendering hotspot somewhere in the bowels of the EXT JS GWT component related to the Grid component. But of course I would like to get a better understanding of the version of EXT JS GWT that the application is utilizing. The ultimate goal would be to move the application to GWT 2.5.x and GXT 3.x once we locate and resolve the performance bottle neck related to IE8.

Thanks for any help in advance!