antirez/redis — pull request #1569 by michael-grunder (2014-02-27 20:05:36+00:00)
Title: Improved bigkeys with progress, pipelining and summary

This commit reworks the redis-cli --bigkeys command to provide more
information about our progress as well as output summary information
when we're done.

- We now show an approximate percentage completion as we go
- Hiredis pipelining is used for TYPE and SIZE retreival
- A summary of keyspace distribution and overall breakout at the end