Benchmark: Set vs Object vs Map doing stuff with clones using Object.assign()

Tests:

Set
const set = new Set(); for (let i = 0; i < 1000; ++i) { set.add(`key_${i}`); } let result = 0; for (let j = 0; j < 100; ++j) { const clone = new Set(set); for (let k = -500; k < 500; ++k) { result += clone.has(`key_${k}`); } } console.log(result);
Object
const obj = {}; for (let i = 0; i < 1000; ++i) { obj[`key_${i}`] = true; } let result = 0; for (let j = 0; j < 100; ++j) { const clone = Object.assign({}, obj); for (let k = -500; k < 500; ++k) { result += clone.hasOwnProperty(`key_${k}`); } } console.log(result);
Map
const map = new Map(); for (let i = 0; i < 1000; ++i) { map.set(`key_${i}`, true); } let result = 0; for (let j = 0; j < 100; ++j) { const clone = new Map(map); for (let k = -500; k < 500; ++k) { result += clone.get(`key_${k}`); } } console.log(result);

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Linux

Set

190/s

Map

90/s

Object

29/s

View exact numbers

Set vs Object vs Map doing stuff with clones using Object.assign() (version: 1)