Run results for: for uncached/cached vs. forEach

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Script Preparation code:

var array = [];
for (var i=0, t=10000; i<t; i++) {
    array.push(Math.round(Math.random() * t))
}
var t=0;

Tests:

for let
for (let i = 0; i < array.length; i++) { t += array[i]; }
for const
for (const i = 0; i < array.length; i++) { t += array[i]; }
for var
for (var i = 0; i < array.length; i++) { t += array[i]; }
for let cached
let len=array.length; for (let i = 0; i < len; i++) { t += array[i]; }
for const cached
const len=array.length; for (const i = 0; i < len; i++) { t += array[i]; }
for var cached
var len=array.length; for (var i = 0; i < len; i++) { t += array[i]; }
forEach
array.forEach(function(v, i) { t += v; });