Run results for: Set.has() vs Array.includes() vs Array.indexOf() vs Array.lastIndexOf() vs Map.has()

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0

Browser: Chrome 125

Operating system: Windows

Device Platform: Desktop

Date tested: 6 months ago

Test name	Executions per second
Set.has()	265114.8 Ops/sec
Array.includes()	101.9 Ops/sec
Array.indexOf()	99.9 Ops/sec
Array.lastIndexOf	60.9 Ops/sec
Map.has()	261713.0 Ops/sec

Script Preparation code:

var testArray = Array(100000).fill(0).map((v, i) => i.toString(16));
var testSet = new Set(testArray);
var testMap = new Map();
testArray.forEach(v => testMap.set(v, 1));

var testCase = Array(100).fill(0).map(v => Math.floor(Math.random() * 200000).toString(16));

Tests:

Set.has()
testCase.forEach(v => testSet.has(v));
Array.includes()
testCase.forEach(v => testArray.includes(v));
Array.indexOf()
testCase.forEach(v => testArray.indexOf(v));
Array.lastIndexOf
testCase.forEach(v => testArray.lastIndexOf(v));
Map.has()
testCase.forEach(v => testMap.has(v));