Run results for: for(const x of arr) vs. for(let i = 0; i < arr.length; i++)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser: Chrome 97

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
for(const x of arr)	35321.1 Ops/sec
for(let i = 0; i < arr.length; ++i)	40693.7 Ops/sec

Tests:

for(const x of arr)
const arr = [] for (let i = 0; i < 10000; i++) { arr.push(i) } for(const hi of arr) { }
for(let i = 0; i < arr.length; ++i)
const arr = [] for (let i = 0; i < 10000; i++) { arr.push(i) } for(let i = 0; i < arr.length; ++i) { const self = arr[i] }