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Pages which are suitable for caching are cached the first time they are requested, then the cached version is served for all later requests. Dynamic content is handled automatically so that both cache correctness and hit ratio is maintained.
The module requires no configuration. Every part of the page contains metadata that allows Internal Dynamic Page Cache to figure this out on its own.
The Toolbar module provides a toolbar for site administrators, which displays tabs and trays provided by the Toolbar module itself and other modules. For more information, see the <a href=":toolbar_docs">online documentation for the Toolbar module</a>.
Tabs are buttons, displayed in a bar across the top of the screen. Some tabs execute an action (such as starting Edit mode), while other tabs toggle which tray is open.
Trays
Trays are usually lists of links, which can be hierarchical like a menu. If a tray has been toggled open, it is displayed either vertically or horizontally below the tab bar, depending on the browser width. Only one tray may be open at a time. If you click another tab, that tray will replace the tray being displayed. In wide browser widths, the user has the ability to toggle from vertical to horizontal, using a link at the bottom or right of the tray. Hierarchical menus only have open/close behavior in vertical mode; if you display a tray containing a hierarchical menu horizontally, only the top-level links will be available.
What is site performance?
Site performance, in this context, refers to speed factors such as the page load time and the response time after a user action on a page.
What is caching?
Caching is saving already-rendered HTML output and other calculated data for later use the first time it is needed. This saves time, because the next time the same data is needed it can be quickly retrieved instead of recalculated. Automatic caching systems also include mechanisms to delete cached calculations or mark them as no longer valid when the underlying data changes. To facilitate that, cached data has a <em>lifetime</em>, which is the maximum time before the data will be deleted from the cache (forcing recalculation).
What is file aggregation?
Aggregation is when CSS and JavaScript files are merged together and compressed into a format that is much smaller than the original. This allows for faster transmission and faster rendering on the other end.
What can I do to improve my site's performance?
The following core software modules and mechanisms can improve your site's performance:
Internal Page Cache module
Caches pages requested by users who are not logged in (anonymous users). Do not use if your site needs to send different output to different anonymous users.
Internal Dynamic Page Cache module
Caches data for both authenticated and anonymous users, with non-cacheable data in the page converted to placeholders and calculated when the page is requested.
Big Pipe module
Changes the way pages are sent to users, so that cacheable parts are sent out first with placeholders, and the uncacheable or personalized parts of the page are streamed afterwards. This allows the browser to render the bulk of the page quickly and fill in the details later.
Performance page settings
In the <em>Manage</em> administrative menu, if you navigate to <em>Configuration</em> &gt; <em>Development</em> &gt; <em>Performance</em>, you will find a setting for the maximum cache lifetime, as well as the ability to turn on CSS and JavaScript file aggregation.
Online documentation for the Internal Page Cache module
Online documentation for the Internal Dynamic Page Cache module
Online documentation for the BigPipe module
What is a URL?
URL is the abbreviation for "Uniform Resource Locator", which is the page's address on the web. It is the "name" by which a browser identifies a page to display. In the example "Visit us at <em>example.com</em>.", <em>https://example.com</em> would be the URL for the home page of your website. Users use URLs to locate content on the web.
What is a path?
A path is the unique, last part of the URL for a specific function or piece of content. For example, for a page whose full URL is <em>https://example.com/node/7</em>, the path is <em>node/7</em>. Here are some examples of paths you might find in your site:
node/7: Path to a particular content item.