Run results for: Lodash partition vs ES6 for..of partition

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser: Chrome 117

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
_.partition	3683215.0 Ops/sec
ES6 partition with for..of	442908.6 Ops/sec
ES partition with filter	5541656.0 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var arr = [
  { name: 'john', hasPet: true },
  { name: 'jack', hasPet: false },
  { name: 'jill', hasPet: false },
  { name: 'james', hasPet: true },
  { name: 'jane', hasPet: false },
]

Tests:

_.partition
_.partition(arr, el => el.hasPet);
ES6 partition with for..of
const partition = (arr, fun) => { const positive = []; const negative = []; for (el of arr) { if (el.hasPet) { positive.push(el); } else { negative.push(el); } } return [positive, negative]; }; partition(arr, el => el.hasPet);
ES partition with filter
const partition = (arr, fun) => { const positive = arr.filter(fun); const negative = arr.filter(el => !fun(el)); return [positive, negative]; }; partition(arr, el => el.hasPet);

Run results for: Lodash partition vs ES6 for..of partition

Comparison of using lodash partition against raw ES6 using for..of loop

_.partition

ES6 partition with for..of

ES partition with filter