Cache plugins, how to speed up WordPress without breaking the site
Every time someone visits a WordPress-based site, the server has to "assemble" it anew: fetch data from the database, process the plugins, generate the page. With more traffic, that is a load. Cache saves a ready version of the page and serves it to subsequent visitors instantly, without reassembling it.
What cache gives you
The effect can be spectacular, the site loads faster, the server does not choke under traffic, and Google rewards speed in the search results. For a business site or a blog it is often the cheapest way to a real speed-up.
Where problems begin
Cache is safe for content that does not change. Trouble starts with dynamic elements:
- the cart and payments in a shop: they cannot be cached, or the customer sees someone else's cart,
- pages after logging in: the client panel, the user account,
- forms and user-dependent content.
A good cache plugin knows how to turn off caching where needed. Configured badly, it shows outdated prices, breaks the cart or "freezes" the site after changes.
The most common mistake: enable aggressive caching in a shop and forget to exclude the cart and the payment page. The customer adds a product, and the cart shows empty.
Cache is not everything
Cache speeds up serving, but it will not fix heavy images, an excess of plugins or weak hosting. It is one piece of the puzzle, alongside image optimisation and tidy plugins.
We will set it up so it works
Choosing and configuring cache for a specific site (especially a shop) is worth doing once and properly. We check what can safely be cached and what to exclude, and test the site after changes.
Is your site slow? Get in touch, we will find what slows it down.