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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.36 Edg/149.0.0.0

Browser: Chrome 149

Operating system: Windows

Device Platform: Desktop

Date tested: 2 months ago

Benchmark engine: Benchmark.js

While Loop for item towards beginning

73.2M/s

includes for item towards start

70.5M/s

For Loop for item towards beginning

67.4M/s

indexOf for item towards beginning

66.3M/s

For Loop for item towards end

36.7M/s

While Loop for item towards end

35.3M/s

indexOf for item towards end

25.8M/s

includes for item towards end

25.0M/s

View exact numbers

Test name	Executions per second
✓ While Loop for item towards beginning	73,153,856 Ops/sec
includes for item towards start	70,503,776 Ops/sec
For Loop for item towards beginning	67,360,224 Ops/sec
indexOf for item towards beginning	66,349,640 Ops/sec
For Loop for item towards end	36,729,512 Ops/sec
While Loop for item towards end	35,290,916 Ops/sec
indexOf for item towards end	25,778,348 Ops/sec
includes for item towards end	24,988,928 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);
}

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')