Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

While Loop for item towards beginning

131.1M/s

For Loop for item towards beginning

131.1M/s

indexOf for item towards beginning

38.2M/s

indexOf for item towards end

23.8M/s

While Loop for item towards end

23.3M/s

For Loop for item towards end

23.3M/s

View exact numbers

Test name	Executions per second
✓ While Loop for item towards beginning	131,134,560 Ops/sec
For Loop for item towards beginning	131,050,664 Ops/sec
indexOf for item towards beginning	38,225,972 Ops/sec
indexOf for item towards end	23,798,890 Ops/sec
While Loop for item towards end	23,293,138 Ops/sec
For Loop for item towards end	23,266,924 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')