Run results for: for vs foreach vs for..in vs for..of (Fixed)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Teams/1.4.00.35564 Chrome/85.0.4183.121 Electron/10.4.7 Safari/537.36

Browser: Chrome 85

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

for in

99.5M/s

for

23.0M/s

foreach

8.0M/s

for..of

2.8M/s

View exact numbers

Test name	Executions per second
✓ for in	99,537,696 Ops/sec
for	22,990,464 Ops/sec
foreach	7,978,902 Ops/sec
for..of	2,829,099 Ops/sec

Script Preparation code:

var array = new Array(100);

Tests:

for
for (let i = 0, len = array.length; i < len; i++) { array[i]; }
foreach
array.forEach(function(i) { i; });
for in
for (let i in array) { array[i]; }
for..of
for (let i of array) { i; }

Run results for: for vs foreach vs for..in vs for..of (Fixed)

Compare loop performance

for

foreach

for in

for..of