innerHTML vs removeChild

JavaScript performance comparison

Revision 129 of this test case created by

Preparation code

<div id='box'>
<a class="item_market_action_button item_market_action_button_green">
					<span class="item_market_action_button_edge item_market_action_button_left"></span>
					<span class="item_market_action_button_contents">
						Купить					</span>
					<span class="item_market_action_button_edge item_market_action_button_right"></span>
					<span class="item_market_action_button_preload"></span>
				</a>
</div>
      
<script>
Benchmark.prototype.setup = function() {
  var b = document.getElementById('box');
  for (var i = 0; i < 1000; i++) {
    b.appendChild(document.createElement('div'));
  }

};

Benchmark.prototype.teardown = function() {
  box.textContent = '';

};
</script>

Preparation code output

<div id='box'> <a class="item_market_action_button item_market_action_button_green"> <span class="item_market_action_button_edge item_market_action_button_left"></span> <span class="item_market_action_button_contents"> Купить </span> <span class="item_market_action_button_edge item_market_action_button_right"></span> <span class="item_market_action_button_preload"></span> </a> </div>

Test runner

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Java applet disabled.

Testing in CCBot 2.0.0 / Other 0.0.0
Test Ops/sec
textContent
	var tmp = document.getElementsByClassName('item_market_action_button_green');
	for (var i = 0; i < tmp.length; i++) {
	  tmp[i].textContent = '';
	}
pending…
innerHTML
	var tmp = document.getElementsByClassName('item_market_action_button_green');
	for (var i = 0; i < tmp.length; i++) {
	  tmp[i].innerHTML = '';
	}
pending…
removeChild/lastChild
	var tmp = document.getElementsByClassName('item_market_action_button_green');
	for (var i = 0; i < tmp.length; i++) {
	  while (tmp[i].lastChild) {
	    tmp[i].removeChild(tmp[i].lastChild);
	  }
	}
pending…
lastChild/remove
var tmp = document.getElementsByClassName('item_market_action_button_green');
for (var i = 0; i < tmp.length; i++) {
  while (tmp[i].lastChild) {
    tmp[i].lastChild.remove();
  }
}
pending…
removeChild/firstChild
var tmp = document.getElementsByClassName('item_market_action_button_green');
for (var i = 0; i < tmp.length; i++) {
  while (tmp[i].firstChild) {
    tmp[i].removeChild(tmp[i].firstChild);
  }
}
pending…
firstChild/remove
var tmp = document.getElementsByClassName('item_market_action_button_green');
for (var i = 0; i < tmp.length; i++) {
  while (tmp[i].firstChild) {
    tmp[i].firstChild.remove();
  }

}
pending…

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