Run results for: For Loop vs While Loop vs indexOf vs includes

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36 EdgA/131.0.0.0

Browser: Chrome Mobile 131

Operating system: Android

Device Platform: Mobile

Date tested: 3 months ago

Test name	Executions per second
For Loop for item towards beginning	26387100.0 Ops/sec
While Loop for item towards beginning	27603452.0 Ops/sec
indexOf for item towards beginning	24061516.0 Ops/sec
For Loop for item towards end	11786085.0 Ops/sec
While Loop for item towards end	11645363.0 Ops/sec
indexOf for item towards end	10050206.0 Ops/sec
includes for item towards start	25621330.0 Ops/sec
includes for item towards end	10126187.0 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);
}

function includesNative(array, item) {
    return array.includes(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')
includes for item towards start
includesNative(arr, 'donuts')
includes for item towards end
includesNative(arr, 'yogurt')

Run results for: For Loop vs While Loop vs indexOf vs includes

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

includes for item towards start

includes for item towards end