Run results for: Lodash reduce vs transform vs Native reduce on object

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Lodash transform

3.6M/s

Native

3.5M/s

Lodash reduce

3.5M/s

View exact numbers

Test name	Executions per second
✓ Lodash transform	3,622,050 Ops/sec
Native	3,548,065 Ops/sec
Lodash reduce	3,546,050 Ops/sec

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Script Preparation code:

window.obj = {};

for (var i = 0, len = 10; i < len; i++) {
  var arr = []
  obj['key' + i] = arr
  for (var n = 0, len = 10; n < len; n++) {
    arr.push({ ['key' + n]: n });
  }
}

Tests:

Lodash reduce
_.reduce(obj, (acc, val, key) => { acc[key] = val.map(d => ({ label: key, value: val })); return acc; }, {})
Native
Object.entries(obj).reduce((acc, [key, val]) => { acc[key] = val.map(d => ({ label: key, value: val })); return acc; }, {})
Lodash transform
_.transform(obj, (acc, val, key) => { acc[key] = val.map(d => ({ label: key, value: val })); }, {})