Run results for: remove undefined from object. entries.filter vs for of vs for in

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser: Chrome 125

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

for in

1.7M/s

for of Object.entries

1.5M/s

filter object entries

1.5M/s

View exact numbers

Script Preparation code:

const testObject = {
    a: 'a',
    b: undefined,
    c: 'c',
    d: undefined,
    e: undefined
}

Tests:

filter object entries
const testObject = { a: 'a', b: undefined, c: 'c', d: undefined, e: undefined } Object.fromEntries(Object.entries(testObject).filter(([_, value]) => value !== undefined))
for of Object.entries
const testObject = { a: 'a', b: undefined, c: 'c', d: undefined, e: undefined } const testObjectCopy = {...testObject} for (const [prop, value] of Object.entries(testObjectCopy)) if (value === undefined) delete testObjectCopy[prop]
for in
const testObject = { a: 'a', b: undefined, c: 'c', d: undefined, e: undefined } const testObjectCopy = {...testObject} for (const prop in testObjectCopy) if (testObjectCopy.hasOwnProperty(prop) && testObjectCopy[prop] === undefined) delete testObjectCopy[prop]