Github user keith-turner commented on the issue:
https://github.com/apache/accumulo/pull/275
I created a [little
program](https://gist.github.com/keith-turner/18aeadfad1f46e919cd4649fa59b3787)
to experiment with the changes in this branch. I am seeing significantly
improved performance (this PR vs master) when fetching two columns from a file
with 10K column families across 10 loc groups. I plan to do more
experimentation and review the code tomorrow.
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