Run results for: Looping over Arrays - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36

Browser: Chrome 79

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
.map	1228.9 Ops/sec
.forEach	1508.7 Ops/sec
for loop	89.7 Ops/sec
for of loop	10460.1 Ops/sec
for of keys	175.5 Ops/sec

Website performance monitoring

Script Preparation code:

arr = Array(10000).fill().map(x=>Math.random())

Tests:

.map
arr.map(x=>{});
.forEach
arr.forEach(x=>{});
for loop
for(let i = 0;i<arr.length;i++){let x=arr[i]}
for of loop
for(let x of arr){}
for of keys
for(let i of arr.keys()){let x = arr[i]}