Long time to load a report in Oracle BI

I have a dashboard with a report inside.
When I load the dashboard it takes 16 seconds, but the SQL time (the time taken to extract the data from database) is only 4.
The report is only a page, so there isn't the additive work to render multiple pages.
Why OBI is so slow?
What can I do to speed up the load of the dashboard?
Thanks.

What's the response time logged in Usage Tracking or NQQuery.log? You can then find out where the delay is occurring, whether it's in BI Server (nqsserver) or Presentation Services (sawserver). If you're not using one of these two then you should be - otherwise you'll just be guessing at your problem.
There's a slide discussing the stack and points of measurement in my presentation here: http://rnm1978.wordpress.com/2010/05/24/performance-testing-and-obiee/
Once you've identified where the delay is, you can then diagnose and rectify the cause.

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