How to reduce Post-Processing time in oracle applications R12?

Hi All,
I ran a XMLP concurrent program at 16-APR-2015 11:23:52 . It's completed at 16-APR-2015 11:30:41. So it took 6 minute 49 seconds. I check the query in sql developer, it's executing less than two minutes. When I check the log file of that program shows the following info...
Beginning post-processing of request 22226009 on node DEV at 16-APR-2015 11:24:43.
Post-processing of request 22226009 completed at 16-APR-2015 11:30:41.
So what is the reason?, and how to reduce the time?

HTML is a simple format (Text).
Excel is more complicated and requires more time to generate. The same applies for Word and PDF output.
Maybe the processing power and memory of the server are not high and this does not help generate the output faster.
I have a workaround for you, generate an XML file (which should finish faster) and open it in Excel.

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http://www.freelists.org/archives/ora-apps-dba/05-2006/msg00000.html
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How to reduce Post-Processing time in oracle applications R12?

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