Benchmark Run Result for: Array loop vs foreach vs map with id compare in objects renan

Array loop vs foreach vs map with id compare in objects renan

Date tested: one year ago

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 YaBrowser/23.3.3.709 Yowser/2.5 Safari/537.36

Test name	Executions per second
foreach	11844.7 Ops/sec
for	7690.5 Ops/sec
map	11458.4 Ops/sec

Benchmark definition (click to collapse):

Script Preparation code:

var idToGet = ''	

function uuidv4() {
  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
    var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8);
    return v.toString(16);
  });
}

var arr = [];
    for (var i = 0; i < 1000; i++) {
      arr[i] = {id: uuidv4(), idx: i};
    }

	var item = arr[Math.floor(Math.random() * arr.length)];
	
	idToGet = item.id
  
    function someFn(i) {
      return i.id === idToGet
    }

Tests:

foreach
arr.forEach(function (item){ someFn(item); })
for
for (var i = 0, len = arr.length; i < len; i++) { someFn(arr[i]); }
map
arr.map(item => someFn(item))

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