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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:108.0) Gecko/20100101 Firefox/108.0

Browser: Firefox 108

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for(const x of arr)	4810.3 Ops/sec
for(let i = 0; i < arr.length; ++i)	6716.8 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] }