speeding up the group/dump query in FAS

[Matt_Domsch at Dell.com]

Currently this query takes several minutes.  HAProxy (or something in the proxy series) times out the request, and returns a 500 to the client.
  https://admin.fedoraproject.org/accounts/group/dump/

Any chance that could be optimized?  FWIW, I use this query in my ftbfs script to convert package owner names to email addresses, so I can send the FTBFS report to the owner's emails directly (on bcc).

Thanks,
Matt

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Matt Domsch
Technology Strategist
Dell | Office of the CTO