Dynamic Fetcher
The Dynamic Fetcher is a Speed Kit component that handles the async fetching of dynamic (personalized/session-based) content from the origin server. It works in parallel with the static page cache, so users see a fast cached render while the Dynamic Fetcher quietly requests fresh dynamic content from the origin. Once the dynamic content arrives, it is merged into the cached page.
Related web performance terms
- DOM (Document Object Model)
The DOM is a tree-like representation of all the elements in an HTML document that is created by the browser when it loads a page.
- DOM Content Loaded
DOM Content Loaded (DOMContentLoaded or DCL) is a browser event that fires when the initial HTML document has been completely loaded and parsed, without waiting for stylesheets, images, and subframes to finish loading.
- DOM Size
DOM Size refers to the total number of elements (nodes) and the complexity of their nesting within a page's HTML structure.
- Deferred JS loading
Deferred JS loading is a technique for loading JavaScript files in a non-blocking way using the `defer` attribute on a `<script>` tag.