Run results for: spread vs mutation vs Object.assign for reduce callback vs for...of loop vs for loop 30K iterations

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Tests:

with spread operator
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 30000).reduce((acc, num) => { return { ...acc, [num]: num } }, {})
with mutation
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 30000).reduce((acc, num) => { acc[num] = num return acc }, {})
with object assign
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } range(0, 30000).reduce((acc, num) => { return Object.assign(acc, {[num]: num}) }, {})
with for...of loop
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } const items = range(0, 30000); let result = {}; for(let item of items) { result[item] = item; }
with for loop
const range = (from, to) => { const output = [] for(var x = from; x < to; x++){ output.push(x) } return output } const items = range(0, 30000); let result = {}; for(let i = 0; i < items.length; i += 1) { result[items[i]] = items[i]; }