Run results for: array.find vs object by key

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/136.0.7103.56 Mobile/15E148 Safari/604.1

Browser: Chrome Mobile iOS 136

Operating system: iOS 18.3.2

Device Platform: Mobile

Date tested: one year ago

Benchmark engine: Benchmark.js

Object by key

281.0M/s

Array.find

20.6M/s

View exact numbers

Test name	Executions per second
✓ Object by key	281,038,464 Ops/sec
Array.find	20,636,126 Ops/sec

Script Preparation code:

var arrayExample = Array(40).fill().map((_, idx) => ({
    id: idx
}));
var objExample = arrayExample.reduce((prev, curr) => prev[curr.id] = curr);

Tests:

Array.find
const found = arrayExample.find((item) => item.id === 39);
Object by key
const found = objExample[39];