Sorry for taking so long to answer, but I haven't seen your post
before.
We haven't yet done any larger performance test, but it is very
acceptable.
Yesterday, in a first no-brainer attempt of GWT.runAsync(), I've
managed to get a 650K initial download and then a separate file per
module (for now, modules varies from few K to 180K).
I'll still try to reduce both the initial download and the modules.
It does takes more time to compile now. That's an issue to me as I
can't use the built-in server: we use EJB, so there's an external
server. Whenever anything changes in RPC (params, methods, even
classes) we need to recompile :-/
I still didn't implement gzip compression, but hope things can get
much better...
Ah, about IE6: as our app is targeted to late 2010, we won't support
IE6 \o/
--
Luis Fernando Planella Gonzalez