Run results for: Reduce vs Object.assign vs Object.fromEntries #2

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36 Edg/141.0.0.0

Browser: Chrome 141

Operating system: Windows

Device Platform: Desktop

Date tested: 9 months ago

Assign

43K/s

From Entries

19K/s

Reduce

17K/s

View exact numbers

Test name	Executions per second
✓ Assign	43,263 Ops/sec
From Entries	19,424 Ops/sec
Reduce	17,257 Ops/sec

Script Preparation code:

function createArray(propsCount) {
    const arr = []
    for (let i = 0; i < propsCount; i += 1) {
        arr.push({
            active: i % 5 === 0
        })
    }
    return arr
}

var users = createArray(1000)

Tests:

Reduce
users.reduce((acc, curr) => { if (curr.active) { return acc } return { ...acc, [curr.id]: curr.name } })
Assign
Object.assign({}, ...users.filter((user) => !user.active).map((user) => ({ [user.id]: user.name })))
From Entries
const a = users.filter((user) => !user.active).map((user) => [user.id, user.name]) Object.fromEntries(a)