Running *UNIX procs* from node webapp using [node-webworker-threads](https://github.com/audreyt/node-webworker-threads) 

.... this way we could feed a html doc into html5tidy,xsltproc,xmllint or whatever and get quick feedback via socket.io.

[edit_1]
Initial test says stay away and just use streams. Found this goldie [duplex-child-process](https://www.npmjs.com/package/duplex-child-process)