Run results for: for vs foreach for (cached length) vs for..of

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0

Browser: Firefox 88

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

var array = new Array(100);
for (var i = 0; i < array.length; i++) {
  array[i] = i * 10000
}

AخA
 
var array = new Array(100);for (var i = 0; i < array.length; i++) {  array[i] = i * 10000}

Tests:

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

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

foreach
array.forEach((i) => { array[i]; });
array.forEach((i) => {
array[i];
});
for (cached length)
for (let i = 0, length = array.length; i < length; i++) { array[i]; }
for (let i = 0, length = array.length; i < length; i++) {
array[i];
}
for..of
for (var i of array) { array[i]; }
for (var i of array) {
array[i];
}