Run results for: Includes vs forEach

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.105 YaBrowser/21.3.3.230 Yowser/2.5 Safari/537.36

Browser: Yandex Browser 21

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
includes	47275.3 Ops/sec
forEach	41258.3 Ops/sec

Script Preparation code:

var arr1 = Array.from(Array(100).keys(), x => ({ value: x, disabled: false }));
var arr2 = Array.from(Array(50).keys(), x => x * 2);

Tests:

includes
arr1.map(x => { if (arr2.includes(x.value)) x.disabled = true; return x; });
forEach
arr1.map(x => { arr2.forEach(y => { if (x.value === y) x.disabled = true; }); return x; });

Run results for: Includes vs forEach

includes

forEach