Hi,
Hopefully somebody can help me.
I have blogged this at http://blogs.officezealot.com/bsandeman

Here is a copy of the issue :

We have our complex InfoPath form being hosted in MOSS and we have been going
through system testing over the last couple of weeks.  We have discovered
that sometimes, clicking a button on the InfoPath form can take over 40 seconds
before it actually starts doing anything, eg: click a button that copies
a field from a secondary data source set to the main data source and change
the view.  It doesn't pop up with the "Sending to server" message until after
40 or so seconds.

The interesting thing is that this only happens in Internet Explorer, if
in Firefox then this takes an insignificant amount of time, eg: 1 second
maybe....

After a bit of research and chatting with others I have discovered that IE
has a much slower JS engine than Firefox, which is likely where the problem
lies.  I have tried to analyse the code that InfoPath has generated and the
majority seems to be in the library file core.js.  This file alone is over
750KB, therefore a truckload of code!  The page itself which is a results
page and contains about 30 rows of data, not much; is actually nearly 2MB
in size!  Which is huge for a web page!

After analysing the code I am struggling to understand why on earth they
are doing what they are doing, it just seems utterly mad, that it has to
execute around a hundred lines of code before it even gets anywhere near
the actual functionality that the button will perform.  This seems overly
complex and is really where our problem lies, it would be much better if
InfoPath auto-generated cleaner and more direct code.

Is anyone able to help me with this?
thanks very much
cheers
Bruce