Type any WordPress URL into PageSpeed Insights and you'll likely see a score below 50. That's not a coincidence. WordPress has structural reasons for being slow, and those reasons have gotten worse over the past decade.
The real causes of a slow WordPress site
It starts with plugins. The average WordPress site runs 20 to 30 plugins. Each loads its own CSS, JavaScript and database queries. With every page visit, the server processes all of those requests from scratch. The result: pages that take 3 to 5 seconds to load, even on a fast connection.
Then there's the theme. Popular page builders like Divi, Elementor and Avada load megabytes of CSS and JavaScript that you're not using. Every animation option, every layout variant, every slider — all loaded on every page, whether you use them or not.
Finally, the database. WordPress stores everything in MySQL: posts, pages, settings, revisions, session data. With every update the database grows and queries become slower.
Why this matters for your business
Google has shown that 53% of mobile visitors leave if a page takes longer than 3 seconds to load. For every extra second, conversion drops by 7%. Site speed is also a Google ranking factor: a slow site ranks lower in search results, even with excellent content.
The two solutions that actually work
Route 1: Optimise WordPress. Limit plugins, use a lightweight theme (GeneratePress or Kadence), configure caching with WP Rocket, compress images and choose proper hosting. With the right setup you can push above 80 on PageSpeed — but it requires ongoing effort.
Route 2: Switch to modern technology. Sites built with Next.js generate static HTML. They load no unnecessary code and don't need a database for every page visit. Scores above 95 on PageSpeed are the norm, not the exception. At CanarySites we build with Next.js as standard. Request a free audit to find out where your current site is losing speed.