Benchmark: Iterative vs Reduce vs reduce with Object.assign vs Object.fromEntries vs Object.assign

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 } })
Map Filter Reduce Assign
users.filter((user) => !user.active).map((user) => ({ [user.id]: user.name })).reduce(Object.assign, {})
From Entries
const a = users.filter((user) => !user.active).map((user) => [user.id, user.name]) Object.fromEntries(a)
Object Asign
Object.assign({}, ...users.filter(user => !user.active).map(user => ({ [user.id]: user.name })))
Iterative
res = {}; users.forEach((user) => { if (user.active) res[user.id] = user.name; }); res;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reduce
Map Filter Reduce Assign
From Entries
Object Asign
Iterative

Iterative vs Reduce vs reduce with Object.assign vs Object.fromEntries vs Object.assign (version: 1)

Comparing performance of: Reduce vs Map Filter Reduce Assign vs From Entries vs Object Asign vs Iterative

Created: one year ago by: Guest

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Reduce

Map Filter Reduce Assign

From Entries

Object Asign

Iterative

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results