Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:131.0) Gecko/20100101 Firefox/131.0

Browser: Firefox 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

For Loop for item towards beginning

66.3M/s

While Loop for item towards beginning

65.2M/s

indexOf for item towards beginning

27.9M/s

indexOf for item towards end

12.3M/s

For Loop for item towards end

11.5M/s

While Loop for item towards end

11.4M/s

View exact numbers

Test name	Executions per second
✓ For Loop for item towards beginning	66,324,044 Ops/sec
While Loop for item towards beginning	65,162,104 Ops/sec
indexOf for item towards beginning	27,910,094 Ops/sec
indexOf for item towards end	12,321,217 Ops/sec
For Loop for item towards end	11,491,574 Ops/sec
While Loop for item towards end	11,409,224 Ops/sec

Script Preparation code:

var arr = ['apple', 'banana', 'cherry', 'donuts', 'eggplant', 'french fries', 'goulash', 'hamburger', 'ice cream', 'juice', 'kebab', 'lemonade', 'mango', 'nuts', 'octopus', 'parsley', 'quail egg', 'risotto', 'stew', 'tapas', 'udon', 'vanilla', 'wheat', 'xylotil', 'yogurt', 'zucchinni'];

function forLoop(array, item) {
	for (var i = 0; i < array.length; i++) {
    	if (array[i] === item) {
          return i;
        }
    }
    return -1;
}

function whileLoop(array, item) {
  	var i = 0;
	while (i < array.length) {
    	if (array[i] === item) {
        	return i;
        }
      	i += 1;
    }
    return -1;
}

function indexOfNative(array, item) {
	return array.indexOf(item);
}

Tests:

For Loop for item towards beginning
forLoop(arr, 'donuts')
While Loop for item towards beginning
whileLoop(arr, 'donuts')
indexOf for item towards beginning
indexOfNative(arr, 'donuts')
For Loop for item towards end
forLoop(arr, 'yogurt')
While Loop for item towards end
whileLoop(arr, 'yogurt')
indexOf for item towards end
indexOfNative(arr, 'yogurt')