Run results for: Different ways (template, vanilla js, innerHTML) to create DOM node

Run details:

User agent: Mozilla/5.0 (iPhone; CPU OS 14_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/8.1.7 Mobile/15E148 Safari/605.1.15

Browser: Mobile Safari 14

Operating system: iOS 14.6

Device Platform: Mobile

Date tested: 3 years ago

Test name	Executions per second
Simple - Template	1446091.5 Ops/sec
Simple - JavaScript	1075627.0 Ops/sec
Simple - innerHTML	992523.4 Ops/sec
Complex - Template	367844.3 Ops/sec
Complex - JavaScript	188942.9 Ops/sec
Complex - innerHTML	199436.3 Ops/sec

Script Preparation code:

var simpleTemplate = document.createElement("template");
simpleTemplate.innerHTML = `<span class="simple"></span>`;
  
var complexTemplate = document.createElement("template");
  complexTemplate.innerHTML = 
  `<span class="complex">
      <span class="simple-1"></span>
      <span class="simple-2">
          <span class="simple-2-1"></span>
      </span>
      <span class="simple-3">
          <span class="simple-3-1"></span>
      </span>
      <span class="simple-4"></span>
  </span>`;

Tests:

Simple - Template
let el = document.createElement("div"); let content = simpleTemplate.content.cloneNode(true); el.appendChild(content);
Simple - JavaScript
let el = document.createElement("div"); let content = document.createElement("span") content.classList.add("simple"); el.appendChild(content);
Simple - innerHTML
let el = document.createElement("div"); el.innerHTML = ``;
Complex - Template
let el = document.createElement("div"); let content = complexTemplate.content.cloneNode(true); el.appendChild(content);
Complex - JavaScript
let el = document.createElement("span"); el.classList.add("complex"); let span1 = document.createElement("span"); span1.classList.add("simple-1"); let span2 = document.createElement("span"); span2.classList.add("simple-2"); let span21 = document.createElement("span"); span21.classList.add("simple-2-1"); span2.appendChild(span21); let span3 = document.createElement("span"); span3.classList.add("simple-3"); let span31 = document.createElement("span"); span31.classList.add("simple-31"); span3.appendChild(span31); let span4 = document.createElement("span"); span4.classList.add("simple-4"); el.append(span1, span2, span3, span4);
Complex - innerHTML
let el = document.createElement("div"); el.innerHTML = ` `;

Run results for: Different ways (template, vanilla js, innerHTML) to create DOM node

Simple - Template

Simple - JavaScript

Simple - innerHTML

Complex - Template

Complex - JavaScript

Complex - innerHTML