oooh, can we talk about the broken BSD utils on OS X next?<p><pre><code>  $ du -hs big.log
  199M	big.log
  $ cat big.log | time tr &#x27;a&#x27; &#x27;b&#x27; | md5
         27.22 real        23.70 user         0.43 sys
  c171314106134f6fde035b11f4354464
  $ cat big.log | time gtr &#x27;a&#x27; &#x27;b&#x27; | md5
          1.05 real         0.30 user         0.23 sys
  c171314106134f6fde035b11f4354464</code></pre>