Run results for: object[]: findIndex vs for loop with more complex condition check

Run details:

User agent: Mozilla/5.0 (Linux; Android 11; HD1907) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.85 Mobile Safari/537.36

Browser: Chrome Mobile 94

Operating system: Android

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
findIndex	8312.8 Ops/sec
for loop	3165.7 Ops/sec

Script Preparation code:

var length = 1e3
var arr = Array.from({length},(_,i) => ({id: i, rand: i * Math.random()}));
var target = Math.floor(length * Math.random());

Tests:

findIndex
let outIdx1 = arr.findIndex((x) => x.id > target && x.rand > length/3 && Math.random() > .5 ); /*console.log('findIndex',outIdx1)*/
for loop
let outIdx2 = -1 for (let i = 0; i < arr.length; i++) { if (arr[i].id > target && arr[i].rand > length/3 && Math.random() > .5) { outIdx2 = i break } } /*console.log('for loop',outIdx2)*/