Run results for: omit vanilla vs. lodash

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36 Edg/132.0.0.0

Browser: Chrome 132

Operating system: Windows

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
vanilla set	10116.8 Ops/sec
vanilla object in	8558.2 Ops/sec
vanilla object coerce	9442.2 Ops/sec
vanilla array	1529.9 Ops/sec
vanilla delete spread	27736.2 Ops/sec
vanilla delete assign	28301.2 Ops/sec
lodash omit	1769.7 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:

function createObj(size) {
  return Array(size)
    .fill(0)
    .map(() => String.fromCodePoint(Math.trunc(Math.random() * 26 + 97)))
    .reduce((acc, char, i) => ({ ...acc, [`${char}${i}`]: i }), {})
}

var obj = createObj(1000)
var keys = Object.keys(obj).filter(() => Math.random() < 0.5)

Tests:

vanilla set
const result = {} const keySet = new Set(keys) for (const key of Object.keys(obj)) { if (!keySet.has(key)) { result[key] = obj[key] } }
vanilla object in
const result = {} const keyObj = {} for (const key of keys) { keyObj[key] = true } for (const key of Object.keys(obj)) { if (!(key in keyObj)) { result[key] = obj[key] } }
vanilla object coerce
const result = {} const keyObj = {} for (const key of keys) { keyObj[key] = true } for (const key of Object.keys(obj)) { if (keyObj[key]) { result[key] = obj[key] } }
vanilla array
const result = {} for (const key of Object.keys(obj)) { if (!keys.includes(key)) { result[key] = obj[key] } }
vanilla delete spread
const result = { ...obj } for (const key of keys) { delete result[key] }
vanilla delete assign
const result = Object.assign({}, obj) for (const key of keys) { delete result[key] }
lodash omit
_.omit(obj, keys)

Run results for: omit vanilla vs. lodash

vanilla set

vanilla object in

vanilla object coerce

vanilla array

vanilla delete spread

vanilla delete assign

lodash omit