Run results for: Finding parent element: Closest vs Loop vs Recursion

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36 OPR/109.0.0.0

Browser: Opera 109

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Closest

5.7M/s

Loop

4.9M/s

Recursion

4.8M/s

View exact numbers

Test name	Executions per second
✓ Closest	5,729,224 Ops/sec
Loop	4,890,026 Ops/sec
Recursion	4,810,901 Ops/sec

HTML Preparation code:

<div class="parent">
  <div class="child">
    <div class="child">
      <div class="child child-last"></div>
    </div>
  </div>
</div>

Script Preparation code:


   
Benchmark.prototype.setup = function() {
  var isParent = function(el) {
    return el.classList.contains('parent');
  }

  var findParent = function(el) {
    if (isParent(el)) return el
    if (!el.parentNode) return false
    return findParent(el.parentNode)
  }
  var element = document.getElementsByClassName('child-last')[0];
};

Tests:

Closest
element = element.closest('.parent')
Loop
while (element) { if (isParent(element)) break; if (!element.parentNode) break; element = element.parentNode; }
Recursion
element = findParent(element)