Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser: Firefox 133

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

For Loop for item towards beginning

207.0M/s

While Loop for item towards beginning

200.7M/s

indexOf for item towards beginning

56.0M/s

indexOf for item towards end

35.7M/s

For Loop for item towards end

32.8M/s

While Loop for item towards end

32.7M/s

View exact numbers

Test name	Executions per second
✓ For Loop for item towards beginning	207,019,664 Ops/sec
While Loop for item towards beginning	200,684,352 Ops/sec
indexOf for item towards beginning	56,004,648 Ops/sec
indexOf for item towards end	35,707,948 Ops/sec
For Loop for item towards end	32,838,028 Ops/sec
While Loop for item towards end	32,671,388 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')