Run results for: desctructuring array keys vs access via index

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser: Firefox 137

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Index Access

226/s

Array Destructuring

146/s

View exact numbers

Test name	Executions per second
✓ Index Access	226 Ops/sec
Array Destructuring	146 Ops/sec

Script Preparation code:

const data = Array.from({length: 1_000_000}, () => [
    Math.random(),
    Math.random(),
    Math.random(),
]);

Tests:

Array Destructuring
let sum1 = 0; for (let i = 0; i < data.length; i++) { const [a, b, c] = data[i]; sum1 += a + b + c; }
Index Access
let sum2 = 0; for (let i = 0; i < data.length; i++) { const arr = data[i]; sum2 += arr[0] + arr[1] + arr[2]; }