Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36
Chrome 131
Linux
Desktop
3 months ago
Test name Executions per second
Set 190.2 Ops/sec
Object 29.2 Ops/sec
Map 90.1 Ops/sec
Tests:
  • Set

    AخA
     
    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);