Run results for: For Loop vs While Loop vs indexOf

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

While Loop for item towards beginning

159.3M/s

For Loop for item towards beginning

152.6M/s

indexOf for item towards beginning

88.0M/s

indexOf for item towards end

45.2M/s

While Loop for item towards end

27.0M/s

For Loop for item towards end

26.9M/s

View exact numbers

Test name	Executions per second
✓ While Loop for item towards beginning	159,325,216 Ops/sec
For Loop for item towards beginning	152,592,368 Ops/sec
indexOf for item towards beginning	88,000,488 Ops/sec
indexOf for item towards end	45,215,772 Ops/sec
While Loop for item towards end	26,967,514 Ops/sec
For Loop for item towards end	26,936,256 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')