binding.js

// Tested in Node.js v0.10.3

// * RESULTS *

// custom bind        x 29,388,127 ops/sec ±1.46% (95 runs sampled)
// native bind        x    636,295 ops/sec ±2.66% (81 runs sampled)
// custom bind invoke x 45,884,456 ops/sec ±1.19% (95 runs sampled)
// native bind invoke x  5,424,592 ops/sec ±1.76% (96 runs sampled)


// * TESTS *

var Benchmark = require('benchmark');
var suite = new Benchmark.Suite;

var someArg = 1;
function testFunc(arg) {}
function wrap(f, context, var_args) {
  var args = Array.prototype.slice.call(arguments, 2)
  return function() {
    return f.apply(context, args);
  }
}

var nativeBound = testFunc.bind(null);
var customBound = wrap(testFunc);

// binding tests
suite.add('custom bind', function() {
  wrap(testFunc, null, someArg);
})
.add('native bind', function() {
  testFunc.bind(null, someArg);
})
// bind invocation tests
.add('custom bind invoke', function() {
  customBound();
})
.add('native bind invoke', function() {
  nativeBound();
})
// add listeners
.on('cycle', function(event) {
  console.log(String(event.target));
})
.run()