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Update to yesterday's non-managed bean post

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One difference I've noticed when I create my bean in the XPage rather than having the server manage it, is that a managed bean seems to be created only once, while loading it up in a DataContext seems to execute the constructor multiple times. If you have a somewhat slow bean, like say it is compiling report data, this can be a significant performance hit.

In the example I'm working on today, generating report data took 246 seconds as a DataContext and 117 seconds as a managed bean.
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