Run results for: Web Component append content 4 ways

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

x-append

638K/s

x-appendraw

620K/s

x-appendchildraw

611K/s

x-innerHTML

609K/s

View exact numbers

Test name	Executions per second
✓ x-append	638,289 Ops/sec
x-appendraw	619,654 Ops/sec
x-appendchildraw	611,304 Ops/sec
x-innerHTML	609,323 Ops/sec

Script Preparation code:

      customElements.define('x-innerhtml', class extends HTMLElement {
          connectedCallback() {
              this.innerHTML = '<span>.</span> ';
          }
      });
      customElements.define('x-appendraw', class extends HTMLElement {
          connectedCallback() {
              const span = document.createElement('span');
              span.textContent = '. ';
              this.append(span);
          }
      });
      customElements.define('x-appendchildraw', class extends HTMLElement {
          connectedCallback() {
              const span = document.createElement('span');
              span.textContent = '. ';
              this.appendChild(span);
          }
      });

      const createElement = (tag, props = {}) => Object.assign(document.createElement(tag), props);

      customElements.define('x-prepend', class extends HTMLElement {
          connectedCallback() {
              this.prepend(createElement("span", {
                  textContent: ". "
              }));
          }
      });
      customElements.define('x-append', class extends HTMLElement {
          connectedCallback() {
              this.append(createElement("span", {
                  textContent: ". "
              }));
          }
      });

Tests:

x-innerHTML
document.createElement("x-innerhtml");
x-appendraw
document.createElement("x-appendraw");
x-appenchilddraw
document.createElement("x-appendchildraw");
x-prepend
document.createElement("x-prepend");
x-append
document.createElement("x-append");

Run results for: Web Component append content 4 ways

Append content to a Web Component with innerHTML, append, appendChild

x-innerHTML

x-appendraw

x-appenchilddraw

x-prepend

x-append