Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:123.0) Gecko/20100101 Firefox/123.0

Browser: Firefox 123

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

While Loop for item towards beginning

149.0M/s

For Loop for item towards beginning

147.3M/s

indexOf for item towards beginning

73.4M/s

indexOf for item towards end

38.9M/s

For Loop for item towards end

28.0M/s

While Loop for item towards end

27.9M/s

View exact numbers

Test name	Executions per second
✓ While Loop for item towards beginning	148,963,824 Ops/sec
For Loop for item towards beginning	147,292,640 Ops/sec
indexOf for item towards beginning	73,421,152 Ops/sec
indexOf for item towards end	38,850,704 Ops/sec
For Loop for item towards end	28,020,042 Ops/sec
While Loop for item towards end	27,944,488 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')