omit vs pick

omit_vs_pick.js

'use strict';

const Benchmark = require('benchmark');
const benchmarks = require('beautify-benchmark');
const suite = new Benchmark.Suite;

const Copy = require('copy-to');

/**
 * omit keys in src
 *
 * @api: public
 */
var slice = Array.prototype.slice;
Copy.prototype.omit = function(keys) {
  if (!Array.isArray(keys)) {
    keys = slice.call(arguments);
  }
  if (keys.length) {
    var originalKeys = Object.keys(this.src);
    this.keys = originalKeys.filter(function(key) {
      return keys.indexOf(key) === -1;
    });
  }
  return this;
};

suite
.add('new Object', function () {
  const obj = {
    name: 'copy-to',
    name1: 'copy-to',
    name2: 'copy-to',
    name3: 'copy-to',
    name4: 'copy-to',
  };

  ({
    name: obj.name,
    name1: obj.name1,
    name2: obj.name2,
  })
})
.add('pick', function() {
  const obj = {
    name: 'copy-to',
    name1: 'copy-to',
    name2: 'copy-to',
    name3: 'copy-to',
    name4: 'copy-to',
  };

  Copy(obj).pick('name', 'name1', 'name3').to();
})
.add('omit v1', function () {
  const obj = {
    name: 'copy-to',
    name1: 'copy-to',
    name2: 'copy-to',
    name3: 'copy-to',
    name4: 'copy-to',
  };

  Copy(obj).omit('name4').to();
})
// add listeners
.on('cycle', function(event) {
  benchmarks.add(event.target);
})
.on('complete', function() {
  benchmarks.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async
.run({ 'async': true });