Run results for: for vs for of3

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0

Browser: Firefox 117

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

for

437/s

for of

106/s

View exact numbers

Test name	Executions per second
✓ for	437 Ops/sec
for of	106 Ops/sec

Script Preparation code:

var count = 1000 * 1000
var data = [];

do {
  data.push(count);
} while(--count);

Tests:

for
let counter = 0; for (var index = 0; index < data.length; index++) { var obj = data[index]; if (obj == obj) counter++; }
for of
let counter = 0; for (const obj of data) { if (obj == obj) counter++; }