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

Run details:

User agent: Mozilla/5.0 (Linux; Android 13; M2012K11AG) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Mobile Safari/537.36

Browser: Chrome Mobile 104

Operating system: Android

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

includes for item towards start

5.0M/s

includes for item towards end

5.0M/s

indexOf for item towards end

5.0M/s

indexOf for item towards beginning

4.9M/s

For Loop for item towards beginning

4.8M/s

While Loop for item towards beginning

4.7M/s

While Loop for item towards end

4.2M/s

For Loop for item towards end

4.1M/s

View exact numbers

Test name	Executions per second
✓ includes for item towards start	5,014,884 Ops/sec
includes for item towards end	5,006,549 Ops/sec
indexOf for item towards end	5,005,072 Ops/sec
indexOf for item towards beginning	4,916,440 Ops/sec
For Loop for item towards beginning	4,782,530 Ops/sec
While Loop for item towards beginning	4,718,327 Ops/sec
While Loop for item towards end	4,152,506 Ops/sec
For Loop for item towards end	4,125,821 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')