Run results for: for of vs for loops

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.2 Safari/605.1.15

Browser: Safari 26

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 7 months ago

for-index

2K/s

for-of

451/s

View exact numbers

Test name	Executions per second
✓ for-index	1,626 Ops/sec
for-of	451 Ops/sec

Script Preparation code:

const planes = new Array(1_000_000).fill(2);

Tests:

for-of
for (const plane of planes) { Math.sqrt(plane); }
for-index
for (let i = 0; i < planes.length; i++) { const plane = planes[i]; Math.sqrt(plane); }