Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 121

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

indexOf for item towards beginning

6.3M/s

indexOf for item towards end

6.3M/s

While Loop for item towards beginning

6.1M/s

For Loop for item towards beginning

5.5M/s

For Loop for item towards end

5.0M/s

While Loop for item towards end

4.9M/s

View exact numbers

Test name	Executions per second
✓ indexOf for item towards beginning	6,348,408 Ops/sec
indexOf for item towards end	6,316,228 Ops/sec
While Loop for item towards beginning	6,063,246 Ops/sec
For Loop for item towards beginning	5,475,487 Ops/sec
For Loop for item towards end	4,954,808 Ops/sec
While Loop for item towards end	4,936,928 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')