title: fastest & efficent MarkDown in JavaScript
body: <p>I'm looking for a JavaScript MarkDown (MD) engine, for both in-browser &amp; server-side via node.js.  Most of the time, the intended output will be HTML5 (though I may use MD for XML, PDF, &amp; the various ePub formats; uncertain if direct MD to xxx-format or HTML to xxx-format would be best).  Fast conversion of a large MD file would be best, but I'm also planning to use it on lower-end mobile phones, so memory usage is also to be considered.</p>
  
  <p>I imagine there is JavaScript-MD experience out there that I can't find, tests people have run, etc.  So far here is the information I have collected:</p>
  
  <p><a href="https://github.com/chjj/marked" rel="nofollow noreferrer">https://github.com/chjj/marked</a> "Built for speed"</p>
  
  <p><a href="https://github.com/guybrush/showdown" rel="nofollow noreferrer">https://github.com/guybrush/showdown</a>  Older &amp; no longer maintained</p>
  
  <p>Other research, most older:
  <a href="https://stackoverflow.com/questions/2430175/what-is-the-best-jquery-wysiwym-textile-editor">What is the Best JQuery WYSIWYM Textile Editor?</a></p>
  
  <p><a href="https://stackoverflow.com/questions/10168285/markdown-to-convert-double-asterisks-to-bold-text-in-javascript/10168521#10168521">Markdown to convert double asterisks to bold text in javascript</a></p>
  
  <p><a href="https://stackoverflow.com/questions/1319657/javascript-to-convert-markdown-textile-to-html-and-ideally-back-to-markdown-t">Javascript to convert Markdown/Textile to HTML (and, ideally, back to Markdown/Textile)</a></p>
  
  <p><a href="https://stackoverflow.com/questions/134235/is-there-any-good-markdown-javascript-library-or-control">Is there any good Markdown Javascript library or control?</a></p>
  
  <p><a href="https://stackoverflow.com/questions/605434/how-would-you-go-about-parsing-markdown">How would you go about parsing Markdown?</a></p>