Immutable vs. Seamless-Immutable benchmark tests

immutable-benchmark-test.js

var Benchmark = require('benchmark');
var Immutable = require('immutable');
var lodash = require('lodash');
var SeamlessImmutable = require('seamless-immutable');

var arr = [];
for (var i = 0; i < 200; i++) {
    arr.push({
       index: i,
       name: 'Pittsburgh Pirates',
       id: 'mlb.t.1',
       url: 'https://sports.yahoo.com/mlb/team/pit'
    });
}
var obj = {
   index: 50,
   name: 'Pittsburgh Pirates',
   id: 'mlb.t.1',
   url: 'https://sports.yahoo.com/mlb/team/pit',
   data: {
       foo: 'bar'
   }
};


var list = Immutable.fromJS(arr);
var map = Immutable.fromJS(obj);
var siList = SeamlessImmutable(arr);
var siMap = SeamlessImmutable(obj);

var suite = new Benchmark.Suite;

suite.add('JS property set', function() {
  arr[51].index = 52;
})
.add('lodash.set (deep)', function () {
    lodash.set(arr, [52, 'index'], 53);
})
.add('Immutable.setIn Array/List', function() {
    list.setIn([51, 'index'], 5);
})
.add('Seamless-Immutable setIn Array/List', function () {
    siList.setIn([52, 'index'], 53);
})
.add('Immutable.setIn Obj/Map', function() {
    map.setIn(['data', 'foo'], 'new bar');
})
.add('Seamless-Immutable.setIn Obj/Map', function() {
    siMap.setIn(['data', 'foo'], 'new bar');
})

// add listeners
.on('cycle', function(event) {
  console.log('');
  console.log(String(event.target));
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async
.run({ 'async': true });