I took the liberty of doing a very naive test on my laptop's VM - the results are at https://gist.github.com/itamarhaber/2ed09513ec6f6ae10071.

  Memcached text: 43585 OPS @ 4.58 msec 
  Memcached binary: 40242 OPS @ 4.96 msec
  Redis: 39727 OPS @ 5.03 msec
  Redis, pipeline 4: 131312 OPS @ 6.09 msec