Seven causes. Seven fixes. Most take less than a day.

We audit a lot of websites. Clients come to us for redesigns, security reviews, content migrations, and one of the first things we always check, without exception, is page speed.

The results are consistently bad. Not ‘could be better’ bad. Genuinely, measurably, business-hurting bad. Three to eight second load times on sites that should load in under a second. Core Web Vitals in the red. Mobile performance scores in the thirties.

Here are the seven causes we find most often, and how we fix each one.

01. Unoptimised images

This is the single biggest cause of slow WordPress sites. The typical offender: a 4MB JPEG uploaded straight from a phone camera, displayed in a 400px thumbnail slot.

The fix is to convert images to WebP, implement responsive srcset attributes so the browser only downloads the size it needs, and add lazy loading on everything below the fold. We combine custom theme code with a lightweight plugin for this. One afternoon of image work routinely cuts page weight by sixty to seventy percent.

02. Too many plugins

WordPress plugins are sold as features. They’re also HTTP requests, database queries and JavaScript files loaded on every page. A site with forty active plugins is a site with forty potential sources of slowdown.

Our audit process sorts every plugin into three buckets: essential, replaceable with custom code, and removable entirely. Most sites we review have at least ten in the third category.

Every plugin you install is a bet that its developer cares about your site’s performance as much as you do. Most of the time, that bet loses.

03. No caching

WordPress is a dynamic PHP application. Without caching, every single page request fires database queries, PHP execution and template rendering, even for a page that hasn’t changed in six months.

A proper caching setup serves pre-built HTML files for static content, cutting out most of that overhead. We configure server-level caching where the host supports it, object caching via Redis or Memcached, and browser caching headers. The result is often a three to four times improvement in time-to-first-byte.

04. Bad hosting

This one is uncomfortable to say, but it needs saying. Shared hosting plans priced at a few dollars a month are incompatible with a high-performing website. They’re oversold, underspecced, and for Nigerian businesses in particular, physically distant from your users.

A server in the UK or US adds latency that has nothing to do with your code and everything to do with geography. We recommend Nigerian-based hosting (Whogohost, QServers, SmartWeb) or a CDN-fronted setup that caches assets close to your audience.

05. No CDN

A Content Delivery Network serves your static assets, images, CSS, JavaScript, from servers close to your visitors. Without one, a user in Lagos hitting a server in London is fighting physics every time a page loads.

Cloudflare’s free tier handles most use cases and takes under an hour to set up. It also adds DDoS protection and SSL at no extra cost.

06. Render-blocking scripts

JavaScript files in the document head block the browser from rendering the page until they’ve finished downloading and executing. Every third-party script you add, analytics, chat widgets, ad pixels, adds to that queue.

The fix: defer or async all non-critical scripts, move them to the footer, and audit whether each one is still needed. We regularly find analytics platforms, abandoned A/B testing tools and dead chatbot scripts still loading on sites months after they were last used.

07. A page builder theme

This is the root cause on roughly half the sites we review. Elementor, Divi, WPBakery and their equivalents generate bloated HTML, load their own CSS and JavaScript on every page whether you use them or not, and make caching significantly more complicated.

They’re popular because they’re fast to build with. They’re slow because of everything that convenience hides.

GressTech doesn’t use page builders. Every theme we build is hand-coded, lean, maintainable and fast. The extra development time pays for itself in performance, security and longevity.

How to check your own site

Run your homepage through these three free tools:

If your mobile score is below 50, or your page takes more than two seconds on a 4G connection, you have a performance problem worth fixing.

Want GressTech to review your site, stack or security posture?

Start a project at gresstechsolutions.com or write to info@gresstechsolutions.com