title: How can I get a parallel stream of Files.walk?
body: <p>I need to do some read-only processing on a all files in a folder recursively. I'm using <code>Files.walk</code> to get a stream of the files, but I noticed that the api specifies that <code>walk</code> only returns a regular stream, not a parallel stream.</p>
  
  <p>How can I process all the files in a directory in parallel?</p>