Run results for: Clone node vs create element

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 11.1.0

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
Clone node	2734.9 Ops/sec
Create element	1191.0 Ops/sec

Script Preparation code:

function createExample() {
  var el = document.createElement('div');
  el.className = 'class-1 class-2 class-3';
  el.id = 'example';
  el.textContent = 'Test';
  return el;
}

Tests:

Clone node
var clone = createExample(); var i = 1000; while (i--) { clone = clone.cloneNode(true); }
Create element
var el = createExample(); var i = 1000; while (i--) { el = createExample(); }

Run results for: Clone node vs create element

Compare cloning element vs creating a new one

Clone node

Create element