jsRube

A small, simple, and ridiculously fast parser for all versions of ECMAScript/Javascript, written in plain ECMAScript3, on which I have been working on and off since September 2015, under codename 'lube'.

A bug in v8 (and consequently in node) made it very difficult to run on node versions 5 and below. The bug has been resolved, and it now runs smoothly (and fater than any other parser I know of) in node v6.2.0+. Please bear this notice in mind while trying to use this parser.

Features

It always records the location data, range data, and raw value of every node, and still it parses jQuery-1.4.2 2x or 3.5x faster than esprima 2.7.2, depending, respectively, on whether the latter doesn't record the location/ranges or it does. Funnily enough, it does all the above while keeping track of as much early errors as I could find in the spec.

It is almost completely esprima-compatible (except when things get annoying, in which case it is acorn-compatible). It is also going to have a full coverage by July 12th 2016 (that is, this weekend), ruthlessly vampiring on esprima's tests.

Future

My take is that, awesome as the parser is, it can still be more robust, and more low-power; even if it hits limits in the previous criteria, I'm still aiming to make it catch all of the spec's early errors, and i am intending to make it so in a matter of weeks, i.e, not even months.

Usage

First,

npm install jsrube

Then:

var jsRube = require( 'jsrube' );
console.log( jsRube.parse('var v = "hi !";') );

anything else

Thanks a lot reading this far.