Run results for: remove vs display:none on each element

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; MI 6 Build/PKQ1.190118.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.120 MQQBrowser/6.2 TBS/045332 Mobile Safari/537.36 MMWEBID/5603 MicroMessenger/7.0.16.1700(0x2700103E) Process/tools WeChat/arm32 NetType/4G Language/zh_CN ABI/arm64

Browser: QQ Browser Mobile 6

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
removeChild	1230283.4 Ops/sec
display:none on each element	361428.3 Ops/sec

HTML Preparation code:

<div id="container"></div>

Script Preparation code:

var container = document.getElementById('container');
ul = document.createElement('ul');
var html = [];
    for ( var i=0; i<2000; i += 1 ) {
  	html.push(`<li>${i}</li>`);
}
 ul.innerHTML = html.join('');
 container.appendChild(ul);

Tests:

removeChild
var element = ul.firstElementChild; while (element) { var element = ul.firstElementChild; element && ul.removeChild(element); }
display:none on each element
var elements = Array.prototype.slice.call(container); for (var i = 0; i < elements.length; i++) { elements[i].style.display = "none"; }

Run results for: remove vs display:none on each element

removeChild

display:none on each element