{"id":5440328,"date":"2023-04-11T12:27:29","date_gmt":"2023-04-11T10:27:29","guid":{"rendered":"https:\/\/wp-rocket.me\/?post_type=caching_hub&p=5440328"},"modified":"2023-05-10T15:32:10","modified_gmt":"2023-05-10T13:32:10","slug":"object-caching","status":"publish","type":"caching_hub","link":"https:\/\/wp-rocket.me\/wordpress-cache\/object-caching\/","title":{"rendered":"What is Object Caching and How to Use It With WordPress"},"content":{"rendered":"

When it comes to caching, there are a lot of different types. There\u2019s browser caching and page caching, not to mention mobile and user caching. If you\u2019re using WP Rocket, you are no doubt already benefiting from these types of caching. But another one you\u2019ll want to add to the mix is object caching<\/strong>.<\/p>

Object caching involves storing database queries and, when enabled on your WordPress site, it can help speed up PHP execution times, reduce the load on your database, and deliver content to your visitors faster.<\/p>

In this post, we\u2019ll cover what object caching is and how it works with WordPress (including the built-in object caching that WordPress provides). We\u2019ll also look at a few different ways you can implement this type of caching on your site to improve its performance.<\/p>

What is Caching?<\/h2>

But first, let\u2019s look at what caching is generally to put object caching into context.<\/p>

Caching is the process of storing frequently-accessed data temporarily in a cache so you can reuse it for subsequent requests.<\/p>

When someone lands on your site, and you don\u2019t have caching enabled, their browser sends a request for the page to your server. Your server then processes the request, compiles the page, and then sends it back to the browser.<\/p>

If you have a low traffic site, your server can sit back and relax, so to speak, since it only has to process and compile pages every now and again. But servers hosting large sites have their work cut out for them\u2014they have to work much harder to process and compile multiple pages per second as requests come in.<\/p>

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How a server work<\/figcaption><\/figure>

This is where caching can help ease the load on your server. It stores a copy of each request and then the next time the same request comes it, it checks the cache and serves it from there. If there\u2019s no copy, the request is sent on to the server to be processed and compiled, and on its way back to the browser a copy is stored in cache.<\/p>

The beauty of caching is that it saves your server from having to do more work than it has to, allowing it to handle more traffic than it other would. It also has the added benefit of delivering your content faster to users.<\/p>

If you\u2019re interested to learn more about how caching works, check out Why a Caching Plugin is Critical to Your WordPress Site<\/a>.<\/p>

Different Types of Caching<\/h3>

There are two main types of caching: client-side caching<\/strong> and server-side caching<\/strong>.<\/p>

There are many types of client-side caching, but the one you\u2019re probably most familiar with is browser caching<\/a>. This is where the browser stores static web page content so the next time someone visits your site, the page is pulled from the cache on their computer instead of being downloaded again.<\/p>

Object caching is a type of server-side caching. There are lots of types of server-side caching, but the important ones to know about include:<\/p>

1. Object caching.<\/strong> We\u2019ll go into this in more detail below, but object caching involves storing database queries so that the next time a piece of data is needed, it is delivered from cache without having to query the database.<\/p>

2. Page caching<\/a>.<\/strong> Page caching involves storing the entire HTML of a page so that on subsequent views, the content\u2014including files and database queries\u2014can be generated and displayed without WordPress having to do it each time.<\/p>

3. Opcode caching<\/a>.<\/strong> Opcode caching involves compiling PHP code between every request. For PHP code to execute, the PHP compiler has to compile the code first and then generate executable code for the server to execute. Opcode caches the already compiled code.<\/p>

4. CDN caching<\/a>.<\/strong> Content delivery networks (CDNs) using edge servers around the world to store static website files (i.e., CSS, JavaScript, and media files) for faster delivery to users who are geographically distant from the host server.<\/p>

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