Run results for: array includes vs set has (x-small list)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser: Chrome 121

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Array.includes

15.7M/s

Set.has

15.6M/s

ArrayProtoIncludes

5.1M/s

View exact numbers

Test name	Executions per second
✓ Array.includes	15,698,956 Ops/sec
Set.has	15,571,068 Ops/sec
ArrayProtoIncludes	5,073,749 Ops/sec

Script Preparation code:

var array = [
    'auto',
    'no-flex',
];

var ArrayProtoIncludes = Array.prototype.includes;
var ReflectApply = Reflect.apply;

var aSet = new Set(array);

Tests:

Array.includes
var b = array.includes('no-flex') var c = array.includes('boop')
Set.has
var b = aSet.has('no-flex') var c = aSet.has('boop')
ArrayProtoIncludes
var b = ReflectApply(ArrayProtoIncludes, array, ['no-flex']); var c = ReflectApply(ArrayProtoIncludes, array, ['boop']);