Run results for: for/for in/forEach array sum

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.36 OPR/118.0.0.0 (Edition std-2)

Browser: Opera 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

for

60K/s

forEach

59K/s

for each

5K/s

View exact numbers

Test name	Executions per second
✓ for	59,815 Ops/sec
forEach	59,448 Ops/sec
for each	5,369 Ops/sec

Script Preparation code:

var array = new Array(10000);
for (let i = 0; i < array.length; i++) {
  array[i] = i;
}

Tests:

for
let sum = 0; for (let i = 0; i < array.length; i++) { sum += array[i]; }
for each
let sum = 0; for (let item in array) { sum += item; }
forEach
let sum = 0; array.forEach(function(item, index) { sum += item; });