Run results for: Array.includes vs Set.has v3

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Benchmark engine: Benchmark.js

Set.has

11.9M/s

Array.includes

45K/s

View exact numbers

Test name	Executions per second
✓ Set.has	11,924,931 Ops/sec
Array.includes	45,386 Ops/sec

Script Preparation code:

var testArr = [];
for(let i = 0; i < 100000; i++) {
  testArr.push(i);
}
var testSet = new Set(testArr);
var valuesToCheck = [0, 10, 200, 3000, 40000 ,500000];

Tests:

Array.includes
let summ = 0; valuesToCheck.forEach(v => { if (testArr.includes(v)) { summ += v; } }); return summ;
Set.has
let summ = 0; valuesToCheck.forEach(v => { if (testSet.has(v)) { summ += v; } }); return summ;