Ripgrep – A new command line search tool
Very nice. Not only fast, but feels modern.<p>Tried it out on a 3.5GB JSON file:<p><pre><code>  # rg
  rg erzg4 k.json &gt; &#x2F;dev&#x2F;null  1.80s user 2.54s system 53% cpu 8.053 total

  # rg with 4 threads
  rg -j4 erzg4 k.json &gt; &#x2F;dev&#x2F;null  1.76s user 1.29s system 99% cpu 3.059 total

  # OS X grep
  grep erzg4 k.json &gt; &#x2F;dev&#x2F;null  60.62s user 0.96s system 99% cpu 1:01.75 total

  # GNU Grep
  ggrep erzg4 k.json &gt; &#x2F;dev&#x2F;null  1.96s user 1.43s system 88% cpu 2.691 total
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GNU Grep wins, but it&#x27;s pretty crusty, especially with regards to its output (even with colourization).