isArray bench

readme.md

$ node -v
v5.8.0
$ node bench.js

Start isArray

  2 tests completed.

  isArray  x 36,544,463 ops/sec ±4.89% (238 runs sampled)
  isArray1 x 43,869,363 ops/sec ±4.31% (247 runs sampled)

$ node -v
v5.9.1
$ node bench.js

Start isArray

  2 tests completed.

  isArray  x 41,617,178 ops/sec ±4.59% (243 runs sampled)
  isArray1 x 40,984,845 ops/sec ±4.85% (273 runs sampled)

while

$ node -v
v4.4.1
$ node bench.js

Start isArray

  2 tests completed.

  isArray  x 44,621,606 ops/sec ±6.41% (264 runs sampled)
  isArray1 x 47,319,872 ops/sec ±2.79% (284 runs sampled)

and

$ node -v
v4.4.0
$ node bench.js

Start isArray

  2 tests completed.

  isArray  x 47,998,121 ops/sec ±1.16% (280 runs sampled)
  isArray1 x 48,294,691 ops/sec ±0.92% (285 runs sampled)

bench.js

var benchmark = require('benchmark')
var benchmarks = require('beautify-benchmark')
global.isArray = require('./index')
global.assert = require('assert')
var suite = new benchmark.Suite

var assertValues = 'assert.strictEqual(obj, true);'

suite.add({
  name: 'isArray',
  minSamples: 200,
  fn: 'var obj = isArray.isArray([]);' + assertValues
})

suite.add({
  name: 'isArray1',
  minSamples: 200,
  fn: 'var obj = isArray.isArray1([]);' + assertValues
})


suite.on('start', function onCycle(event) {
  process.stdout.write('Start isArray' + '\n\n')
})

suite.on('cycle', function onCycle(event) {
  benchmarks.add(event.target);
})

suite.on('complete', function onComplete() {
  benchmarks.log();
})

suite.run({async: false})

index.js

var toString = {}.toString;

var isArray = Array.isArray || function (arr) {
  return toString.call(arr) == '[object Array]';
};

var isArray1 = Array.isArray || function (arr) {
    return Object.prototype.toString.call(arr) == '[object Array]';
};

module.exports = {
  isArray: isArray,
  isArray1: isArray1
}