Xcelsius - Live Office - Refresh

Need expert inputs
Environment:
Xcelsius 2008 SP1 - BO XI 3.0
WEBI Reports on top of BI OLAP Universe
I've 1 tab with 4 dashboards and a total of 22 live office connections [ 4 excel tabs with about 6000 excel rows total]. The live office connection in excel seem to refresh using the WEBI instance in under 40 seconds. However, the same when imported into xcelsius takes for ever to refresh.
Our plan is to refresh using WEBI instances to gain some performance; however xcelsius loading using live office connection even with the instances and the initialization time for SWF is a major concern right now;
Any thoughts on how we can improve performance?
is it no of connections? or the amount of data? or any oss note or patch of xcelsius is needed?
Thanks
Gopal Krishnamurthy

Thanks Anil. I did refer to the best practices document and other documents/links available on SDN. However, there are no definitive answers on optimum no of connections, no of excel rows for xcelsius to handle. II've made sure that there are no excel formulas or any kind of excel functions for xcelsius to perform. Still, just loading and rendering rom Live office take so much time , when Excel using Live office is loading the same effortlessly.
I would really appreciate if someone can make recommendation on this so that we can consider remodelling our dashboards accordingly.
Thanks
Gopal

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