![]() ![]() Storing data that takes too long to load.Īnd if I am to detail it a bit I'd have to add that:Ĭaching can be either permanent or time-limited and that you're free to cache any type of data on your website. Cache API in Drupal 8: The Automatic Cache SystemĪ brief, yet accurate definition of cache in Drupal 8 would be: In short: caching data translates into faster page load time. ![]() retrieving it from a slower data container or fully recreating the result. Or: it's a software or hardware component where you store your data.īecause this will streamline the way your website serves all future requests for that cached data.Īnd it goes without saying that reading data straight from the cache takes less time than. strategy (or layer) for storing data from your website. What Is Caching More Precisely? Why Do We Cache Data?Ĭaching is a. Let's try to demystify the terminology of Drupal 8's Cache API and to translate its new “fancy” terminology into. You might have already bumped into terms like “max-age”, "context cache" or "cache tags".īut how precisely do these new concepts, part of Drupal 8's cache system, refine and streamline the way you cache data on your website? There are more useful tidbits in the presentation that John Doyle, our CTO, gave at the DC Meetup in October.What makes the Cache API in Drupal 8 any better than Drupal 7's cache system? What's so revolutionary about it? Which of the old limitations does it remove? What are those new concepts and terminology that you should learn about?Īnd, most of all: how complex is it to set up a cache in Drupal 8 for a specific use case? Acquia has recently launched their Public Beta for Acquia Purge as well, so if you are hosting on Acquia, it simplifies the process significantly. When I save my node to make this update, it will trigger a cache invalidation of all nodes that have “node:123” in their cache tag list, thus ensuring that my new title shows up on pages where it is referenced.įor more advanced cache purging (memcache, varnish, CDNs), you will need to utilize the purge module. Now, we want to change the title of that page to be “Drupal 8 Render Caching”. In the example above, assuming that we have followed best practices and rendered our cache property arrays, the cache tag of “node:123” should have been added to the render tags array of the homepage, product landing pages and relevant blog posts that reference this item. Lets walk through an example: We have a website that has a blog post node/123: “My Drupal 8 Render Test” which is referenced in the recent content section on the home page, featured on a few of our product landing pages and in the related content of other blog pages. Is the website complex enough to require custom render processing?Ĭache tags are where the magic happens! Cache tags allow the system to identify dependencies to a render object and invalidate pages when there are changes made to the dependent page.Īs mentioned above, cache tags are custom identifiers that this render array depends on to render properly, such as Referenced Entity ID’s.Is there any content that is context specific? (ie.Are there any highly dynamic sections of the website? (ie.How often are pages on my site updated?.Some questions that may help you in the early stages of your project would be: Working with render caching is something that you should be thinking about from the beginning of your project. You are able to add and/or customize this for any render element. The render cache is a “#cache” property that is defined on your render arrays. Cache max-age – determines how long the item I am rendering can be cached for.Cache Tags – custom identifiers that this render array depends on to render properly, such as Referenced Entity ID’s.Does my display change based on user role, language, time of day, location, etc? Cache Contexts – variations of what I am rendering.Cache Keys – a representation of a set of code that you want to make cacheable, and is typically something that is too expensive to render on every page load. ![]() The first step in your journey is to understand what makes up the Render Cache property: So… What does the Render Cache look like? Render caching allows us to bypass much of the unnecessary processing and dramatically improve the site performance. The process of loading, rebuilding and re-rendering entities in Drupal is a very expensive task and much of the time, is unnecessary. Render caching is the process of storing post-rendered data so that Drupal does not needlessly rebuild and re-render arrays. Have you ever found yourself asking the question “Why are my changes to my twig template not showing up?” or “Why do I have to clear my cache every time I make a change to a preprocess function?”. ![]()
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