Benchmark Multiline Stylus

bench.js

var stylus1 = require('../node_modules/stylus'),
    stylus2 = require('../cloned/stylus'),
    Benchmark = require('benchmark'),
    fs = require('fs');

fs.readFile('C:/node/cloned/stylus/test/cases/regression.127.styl', 'utf8', function (err, str) {
  if (err) throw err;
  
  var handler = function (err, css) {
    if (err) console.error(err);
  };
  var suite = new Benchmark.Suite;
  suite.add('Stylus (original)', function () {
        stylus1(str, {filename: 'regression.127.styl'}, handler);
      })
      .add('Stylus (modified)', function () {
        stylus2(str, {filename: 'regression.127.styl'}, handler);
      })
      .on('cycle', function (event, bench) {
        console.log(bench.toString());
      })
      .on('complete', function () {
        console.log('Fastest is ' + this.filter('fastest').pluck('name'));
      })
      .run();
});

result

c:\node\test>node bench
Stylus (original) x 273,162 ops/sec ±0.60% (58 runs sampled)
Stylus (modified) x 277,525 ops/sec ±1.19% (60 runs sampled)
Fastest is Stylus (original),Stylus (modified)

Also, using control.boilerplate.styl gives the following results:

c:\node\test>node bench
Stylus (original) x 270,123 ops/sec ±0.91% (62 runs sampled)
Stylus (modified) x 281,184 ops/sec ±0.19% (58 runs sampled)
Fastest is Stylus (original),Stylus (modified)

The modified code is 1.6% slower for regression.127.styl and 4.1% slower for control.boilerplate.styl.