Re: 'accumulate' copyField for faceting

[Ryan McKinley]

329.0   total time
  0.0   set up/parsing
  125.0         main query
  46.0          faceting
  100.0         optimized pre-fetch
  58.0          debug

Times are in milliseconds.  I've found breaking down the timing rather
useful since I have huge stored docs and non-query-related tasks often
take up big chunks of time.  I could contribute it if anyone else
would find it useful.

Yes, this would be really helpfull.  It would be nice to be able to
put this in in the response output too.

thanks
ryan