Where WordPress Sites Actually Lose Their Speed

Images are almost always first

A single unoptimised photograph can be larger than the rest of the page combined. Most slow WordPress sites have a homepage carrying several megabytes of images.

Resize to the dimensions actually displayed, compress properly, use modern formats, and lazy-load anything below the fold.

Hosting is the second

Cheap shared hosting means your site shares a server with hundreds of others. No amount of optimisation compensates for a server that takes two seconds to respond.

Decent managed hosting costs a little more monthly and it is the single most effective change on many sites.

Then plugins and scripts

1. Plugins that load their assets on every page whether needed or not
2. Page builders adding large stylesheets and scripts
3. Third-party embeds — chat, analytics, maps, fonts, tracking pixels
4. Sliders, which are almost always the slowest element on a page

Caching, done properly

• Page caching so pages are not rebuilt for every visitor
• Object caching where the host supports it
• A CDN for static assets, particularly if your audience is spread
• Browser caching headers set sensibly

Installing a caching plugin and never configuring it is common and does relatively little.

Measure the right thing

Test the pages that matter — your homepage, your main service page, your busiest landing page — on a mobile connection, not on your office fibre.

And measure again after each change rather than making six at once and hoping.

Frequently asked questions