Run results for: Battle of the JavaScript Loops

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
for	1277126.4 Ops/sec
for (with defined iterator)	974951.1 Ops/sec
for (with defined iterator and iterator limit)	1305879.2 Ops/sec
for of	139566.1 Ops/sec
for in	63762584.0 Ops/sec
forEach	964478.1 Ops/sec
do while	1131533.5 Ops/sec
do while (with defined iterator limit)	1111608.9 Ops/sec
while	1301794.6 Ops/sec
while (with defined iterator limit)	1302924.5 Ops/sec

Script Preparation code:

var array = new Array(1000);

Tests:

for
for (var i = 0; i < array.length; i += 1) { array[i]; }
for (with defined iterator)
var i = 0; for (i; i < array.length; i += 1) { array[i]; }
for (with defined iterator and iterator limit)
var i = 0; var arrayLength = array.length; for (i; i < arrayLength; i += 1) { array[i]; }
for of
for (var i of array) { array[i]; }
for in
for (var i in array) { array[i]; }
forEach
array.forEach(function(i) { array[i]; });
do while
var i = 0; do { array[i]; i += 1; } while (i < array.length);
do while (with defined iterator limit)
var i = 0; var arrayLength = array.length; do { array[i]; i += 1; } while (i < arrayLength);
while
var i = 0; while (i < array.length) { array[i]; i += 1; }
while (with defined iterator limit)
var i = 0; var arrayLength = array.length; while (i < arrayLength) { array[i]; i += 1; }