Astro vs WordPress: why your site is slow, and the fix
Why WordPress sites get heavy over time, how a static-first stack stays fast, and when a migration is actually worth it.
If your site feels slow, the instinct is to blame the hosting. Usually the hosting is fine. The weight is coming from the platform, and on a lot of New Zealand business sites that platform is WordPress carrying more than it was ever meant to.
WordPress runs a huge share of the web and can be made fast. But left alone it tends to get heavier every year, and understanding why is the first step to fixing it.
Why WordPress gets heavy
WordPress builds each page on the fly. Every time someone visits, the server queries a database, runs PHP to assemble the page from your theme, and layers in whatever your plugins want to add. Then it ships the result, plus the theme's CSS and JavaScript, plus each plugin's, to the browser.
None of that is a problem on its own. It compounds:
- Plugins. Each one adds its own scripts and styles to every page, whether the page uses it or not. A dozen plugins is a dozen tag-alongs on your homepage.
- Page builders. Elementor, Divi and friends make editing easy and pages heavy. They wrap your content in layers of markup and load a large runtime to render it.
- Themes built to do everything. A multipurpose theme ships the code for features you will never use.
- The update treadmill. Core, theme and plugins all need patching, and every update is a chance for something to break or slow down.
What static-first does differently
Astro is a static-first framework. Instead of assembling pages on every request, it builds them to plain HTML ahead of time, at deploy. When someone visits, the server hands over a finished page. There is no database query, no PHP, no per-request assembly.
The bigger win is on the browser side. Astro ships almost no JavaScript by default, only the small amount a page genuinely needs. A WordPress page might send hundreds of kilobytes of scripts before it can respond to a tap; a well-built Astro page sends a fraction of that. On a mid-range phone on mobile data, which is how a lot of your customers actually arrive, that difference is the gap between instant and sluggish.
Google measures real-world load speed through Core Web Vitals, and it is a ranking input. Speed is also a conversion input: people leave slow pages before they read a word. So a faster platform quietly lifts both your rankings and your booking rate from the same traffic. That is the return behind our website performance work.
When a migration is worth it
Not every WordPress site should move. If yours is fast, maintained and doing its job, leave it. A migration earns its keep when the platform is the ceiling:
- You cannot remove the plugin bloat without breaking the site.
- You are locked into a page builder you cannot escape.
- Security patching and updates have become a monthly chore.
- You are paying for hosting muscle to compensate for a heavy site.
The move itself is mostly discipline: export the content, map every URL to a 301 redirect so the rankings survive, port or refresh the design, wire the forms and integrations, then cut over. We run it as a dedicated WordPress to Astro migration service, because the redirect mapping is the difference between keeping your search presence and starting over.
The honest test
Open your own site on your phone, on mobile data, and count the seconds until you can actually use it. Then run it through Google's free Lighthouse test. If the score is poor and you cannot see how to fix it inside WordPress, the platform is the problem, and no amount of better hosting will paper over it. If you want a plain read on what a rebuild would cost either way, that is covered in how much a website costs in NZ.
People also ask
Is Astro really faster than WordPress?
For most business sites, yes, and by a wide margin, because the two work differently. WordPress assembles each page from a database and PHP on every request, then ships a theme plus its plugins to the browser. Astro builds the pages to plain HTML ahead of time and ships almost no JavaScript. Less to assemble and less to download means a faster page, especially on a phone.
Will moving off WordPress hurt my Google rankings?
Not if the migration is done properly. Rankings live on URLs, so the job is to map every old URL to its new one with 301 redirects before the switch. Done right, Google follows the redirects and your rankings come with you. Done carelessly, you lose the URLs and the rankings with them. It is the single most important part of the move.
Can I still edit my own content without WordPress?
Yes. You do not need the WordPress admin to edit text. Depending on how often you publish, we set you up with the right editing layer: a lean static build for sites that rarely change, or a headless CMS if your team wants a familiar editor without the slow front end.
When is it not worth migrating?
If your WordPress site is genuinely fast, well maintained and doing its job, leave it. Migration pays off when the platform itself is the ceiling: plugin bloat you cannot remove, a page builder you cannot escape, or a security and update treadmill that never ends.
Want this handled, not homework?
This is the same thinking we bring to a build. Tell us what you are up against and we will point you, plainly, at the move that matters first.