What is Website Caching?
Caching a website refers to the method of retrieving and saving copies of specific files or data in a cache so that they are easier to obtain. It all starts when the user gets on the site for the first time.
The browser gets the URL and sends a request to the server. The server then processes the request, fetches the corresponding content (HTML, CSS, images, etc.), and shows it on the user’s screen.
As previously mentioned, when there is no caching, the process is repeated for each and every visitor, even if the same page is being accessed a few seconds after loading. This process slows down the loading speed of the webpages.
Types of Website Caching
Several types of caching are integrated in website development, so these types are organized by the purpose they serve:
Browser Caching Browser caching is the type dealing with the storage of static files like images, CSS and Javascript on the used browser. When a user goes for a second time on the browser side, all resources needed are already available thus increasing the loading speed of the website.
Caching Performed on the Server Side
This type of caching occurs on the web server and consists of:
- Page caching: HTML pages are generated once and saved so that they can be retrieved rapidly instead of regenerating them.
- Object caching: Keeps the results of database queries so that dynamic content does not need to be rebuilt entirely.
Caching Using CDN
A CDN keeps cached copies of your website in multiple locations, making it quick and easy to serve users from various regions. CDN mitigates latency by allowing users to retrieve working copies from the nearest server.
Caching The Database
High website traffic that heavily relies on dynamic content usage requires performance enhancement tools, and the most effective one is caching selected database queries.
Why is Website Caching Important?
Caching has advantages far beyond just accelerating speed, which benefits the performance of websites and the experience of users. Their efficiency is enhanced by the following reasons:
Enhanced Website Loading Speed
Users are more likely to remain on a website that loads quickly. Website caching enables users to load data without having to wait for it to be re-downloaded or pages regenerated. Optimizing caching mechanisms will enable web developers to reduce page load times by several seconds.
Improved SEO Metrics
Page speed is one of the elements Google considers it when ranking a website. A webpage that loads faster within a given period will be prioritized. Caching does aid in developing a website and aligns with SEO practices for better visibility on the internet.
Lower Load on Server
Increased website speed and reduction in website requests means less data has to be processed. Thus, the server can support more website traffic aiding promotion or marketing campaigns.
Improvement of User Experience
For every individual, long wait times as a result of website loading are annoying. Website caching helps speed up the loading times which helps improve the overall browsing experience which can lead to higher retention rates.
How Developers Do Website Caching
Setting up caching is a blend of back end and front end for web developers. There are various ways developers add caching in the progress of developing a website.
Adding Headers of HTTP
HTTP headers such as Cache-Control and Expires allow developers tell browsers the period certain files should be kept on their devices. This is very important for caching from browsers.
Utilizing Caching Plugins for WordPress
If you have a WordPress site, managing different types of caching is simple with plugins like W3 Total Cache, WP Super Cache, and LiteSpeed Cache.
Configuration from the Server
Server-side caching using technologies such as Varnish, Nginx, or even integrated caching in hosting services like SiteGround and Cloudways can be very effective.
Using CDNs
Cloudflare, Amazon Cloudfront, and Akamai are examples of Content Delivery Networks that not only redistribute traffic, but also offer advanced caching capabilities to improve speed worldwide.
Common Mistakes to Avoid
Caching can be very helpful for your website, but if not implemented correctly, it can be even more detrimental. Here is a list of poor practices that are frequently seen in website caching policies:
Placing cache on excessively sensitive or ever-changing pages. Carts and log-in pages are some examples that should not be stored in the cache.
Not refreshing caches after some form of system or website updates. Quite frequently, users might think that nothing has updated when, in fact, the changes being made are permanently stored in the cache.
Using two or more contradictory caching systems in one location: The aforementioned multiple caching plugins or layers of volume tend to create disagreements and cause everything to lag.
Tools to Test Website Caching and Loading Speed
As a web owner or in charge of developing a website, it is essential to keep a close on the performance of your website. Here are some tools to help you accomplish just that:
- Google PageSpeed Insights: Highlights areas of improvement alongside performance scores.
- GTmetrix: Provides analysis on load time and status of caches, along with an in-depth overview.
- Pingdom Tools: Provides an in-depth look at the load times for each area within the page.
- WebPageTest.org: For performance-based test measurements, including the cache and CDN.
Final Thoughts
Whether it is a new or an existing website, website caching techniques as well as address caching must be integrated within the development plan. There is no denying that it serves its function in boosting the speed of any website, along with its SEO, reduces the traffic from the servers, relieves the users of unnecessary hassle, and improves their experience on the website.
If you still haven’t started using caching, you should consider starting now. And if you don’t know how to go about it, it is wise to seek help from a professional web developer with solid caching strategies for your platform and users.