Performance Differences IE 8 Vs FF 3.x

I have one particular use case when there is significant difference in
terms of response time between IE8 Vs FF 3.x

IE 8 = 25-35 seconds response time
FF 3.x = 5 - 8 seconds response time.

Rest of the application seems to be OK in IE 8.

In this particular use case, I am making 1 RPC which in data access
layer makes 5 database calls and returns the data to java class that
corresponds to ui.xml Java class then populates the data returned
into 4 list boxes and 1 suggestion box- there is no additional
processing of data other than getting it from data access layer. The
data is returned from data access layer pretty fast
In terms of data, 1 list box has 4000 elements and one suggestion box
has 7000 elements.

Event to above use case is selection of row from cell table and
clicking on edit button - this performs very well in FF and Chrome but
has slower performance in IE 8

Any pointers why this could be happen ?

Mittal

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