Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (Linux; Android 8.0.0; ATU-L22) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/93.0.4577.82 Mobile Safari/537.36

Browser: Chrome Mobile 93

Operating system: Android 8.0.0

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
For Loop for item towards beginning	448841.0 Ops/sec
While Loop for item towards beginning	452509.3 Ops/sec
indexOf for item towards beginning	463779.6 Ops/sec
For Loop for item towards end	385291.7 Ops/sec
While Loop for item towards end	401306.2 Ops/sec
indexOf for item towards end	490498.1 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')

Run results for: For Loop vs While Loop vs indexOf

For Loop for item towards beginning

While Loop for item towards beginning

indexOf for item towards beginning

For Loop for item towards end

While Loop for item towards end

indexOf for item towards end