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/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

While Loop for item towards beginning

83.1M/s

For Loop for item towards beginning

80.2M/s

indexOf for item towards beginning

79.3M/s

includes for item towards start

62.1M/s

For Loop for item towards end

26.6M/s

includes for item towards end

25.7M/s

indexOf for item towards end

25.3M/s

While Loop for item towards end

22.4M/s

View exact numbers

Test name	Executions per second
✓ While Loop for item towards beginning	83,058,312 Ops/sec
For Loop for item towards beginning	80,248,000 Ops/sec
indexOf for item towards beginning	79,340,216 Ops/sec
includes for item towards start	62,124,040 Ops/sec
For Loop for item towards end	26,582,530 Ops/sec
includes for item towards end	25,703,474 Ops/sec
indexOf for item towards end	25,265,670 Ops/sec
While Loop for item towards end	22,366,056 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')