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/122.0.0.0 Safari/537.36 Edg/122.0.0.0

Browser: Chrome 122

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

includes for item towards start

13.2M/s

indexOf for item towards beginning

13.2M/s

indexOf for item towards end

13.1M/s

For Loop for item towards beginning

13.1M/s

While Loop for item towards beginning

13.0M/s

includes for item towards end

13.0M/s

For Loop for item towards end

10.8M/s

While Loop for item towards end

10.8M/s

View exact numbers

Test name	Executions per second
✓ includes for item towards start	13,227,468 Ops/sec
indexOf for item towards beginning	13,220,134 Ops/sec
indexOf for item towards end	13,140,772 Ops/sec
For Loop for item towards beginning	13,051,594 Ops/sec
While Loop for item towards beginning	13,013,130 Ops/sec
includes for item towards end	12,978,236 Ops/sec
For Loop for item towards end	10,820,810 Ops/sec
While Loop for item towards end	10,786,814 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')