I have access to, but no admin rights on, one of our Ubuntu production server, so I had to install the single file version of ack.
I did a trial run (ack vs grep). The results are not impressive and grep does win. However it seems it should be the other way around. Why is grep search faster than ack?
$ time ack Trial . real 0m20.789s user 0m4.800s sys 0m1.020s $ time grep -nr Trial . real 0m4.722s user 0m0.230s sys 0m0.510s