title: Fast search for text in files in a directory in unix?
body: <p>Is there a good solution for performing searches similar to</p>
  
  <pre><code>find . -name "*.*" | xargs grep "some text"
  </code></pre>
  
  <p>but with much faster search, due to offline indexing. Support for wildcards or light regular expressions would be nice, but even raw text search that could run very fast due to offline preprocessing would be great.</p>