Benchmark str concatenation

bench.js

var Benchmark = require('benchmark')

var suite = new Benchmark.Suite

suite
.add('push', function () {
  var a = []
  a.push("Lorem")
  a.push("ipsum")
  a.push("dolor")
  a.push("sit")
  a.push("amet,")
  a.push("consectetur")
  a.push("adipisicing")
  a.push("elit,")
  a.push("sed")
  a.push("do")
  a.push("eiusmod")
  a.push("tempor")
  a.push("incididunt")
  a.push("ut")
  a.push("labore")
  a.push("et")
  a.push("dolore")
  a.push("magna")
  a.push("aliqua.")
  a.push("Ut")
  a.push("enim")
  a.push("ad")
  a.push("minim")
  a.push("veniam,")
  a.push("quis")
  a.push("nostrud")
  a.push("exercitation")
  a.push("ullamco")
  a.push("laboris")
  a.push("nisi")
  a.push("ut")
  a.push("aliquip")
  a.push("ex")
  a.push("ea")
  a.push("commodo")
  a.push("consequat.")
  a.push("Duis")
  a.push("aute")
  a.push("irure")
  a.push("dolor")
  a.push("in")
  a.push("reprehenderit")
  a.push("in")
  a.push("voluptate")
  a.push("velit")
  a.push("esse")
  a.push("cillum")
  a.push("dolore")
  a.push("eu")
  a.push("fugiat")
  a.push("nulla")
  a.push("pariatur.")
  a.push("Excepteur")
  a.push("sint")
  a.push("occaecat")
  a.push("cupidatat")
  a.push("non")
  a.push("proident,")
  a.push("sunt")
  a.push("in")
  a.push("culpa")
  a.push("qui")
  a.push("officia")
  a.push("deserunt")
  a.push("mollit")
  a.push("anim")
  a.push("id")
  a.push("est")
  a.push("laborum")
  new Buffer(a.join())
})
.add('add', function () {
  var s = ""
  s += "Lorem"
  s += "ipsum"
  s += "dolor"
  s += "sit"
  s += "amet,"
  s += "consectetur"
  s += "adipisicing"
  s += "elit,"
  s += "sed"
  s += "do"
  s += "eiusmod"
  s += "tempor"
  s += "incididunt"
  s += "ut"
  s += "labore"
  s += "et"
  s += "dolore"
  s += "magna"
  s += "aliqua."
  s += "Ut"
  s += "enim"
  s += "ad"
  s += "minim"
  s += "veniam,"
  s += "quis"
  s += "nostrud"
  s += "exercitation"
  s += "ullamco"
  s += "laboris"
  s += "nisi"
  s += "ut"
  s += "aliquip"
  s += "ex"
  s += "ea"
  s += "commodo"
  s += "consequat."
  s += "Duis"
  s += "aute"
  s += "irure"
  s += "dolor"
  s += "in"
  s += "reprehenderit"
  s += "in"
  s += "voluptate"
  s += "velit"
  s += "esse"
  s += "cillum"
  s += "dolore"
  s += "eu"
  s += "fugiat"
  s += "nulla"
  s += "pariatur."
  s += "Excepteur"
  s += "sint"
  s += "occaecat"
  s += "cupidatat"
  s += "non"
  s += "proident,"
  s += "sunt"
  s += "in"
  s += "culpa"
  s += "qui"
  s += "officia"
  s += "deserunt"
  s += "mollit"
  s += "anim"
  s += "id"
  s += "est"
  s += "laborum"
  new Buffer(s)
})
.on('cycle', function (event, bench) {
  console.log(bench.toString());
})
.on('complete', function () {
  console.log('Fastest is ' + this.filter('fastest').pluck('name'))
})
.run()