How to Optimise WordPress to Speed Up Your Website

Go to Pingdom Tools → Enter your most important page URL (homepage, sales page, or checkout) → Select the location closest to your target audience (e.g. Singapore for South Asia) → Click 'Start Test'. Record these four numbers before you make any changes: • Performance grade (target: A or B) • Page size (target: under 2MB) • Load time (target: under 3 seconds) • Number of requests (target: under 50)

Open your website in Chrome → Right-click → Inspect → Go to the 'Network' tab → Reload the page. Look for: • Any files over 500KB (images are the most common culprit) • Scripts that take over 500ms to load • Requests that return 404 errors (broken files still slow the page) Switch to the 'Lighthouse' tab → Click 'Analyse page load' → Read the recommendations.

Uncompressed images are the single biggest cause of slow WordPress sites. Install the plugin 'Smush' or 'ShortPixel' → Run bulk optimisation on all existing images in your Media Library. Target: every image under 150KB. Hero images can go up to 300KB if they are high-resolution backgrounds. For new images going forward: compress before uploading using Squoosh (free, no quality loss at 80% quality setting).

Lazy loading means images below the fold only load when a user scrolls to them — reducing initial load time significantly. In WordPress 5.5+, lazy loading is enabled by default for images. Check it is working: Go to any page → View page source (Ctrl+U) → Search for 'loading=' → You should see loading="lazy" on img tags. If not present, install 'a3 Lazy Load' plugin and enable it.

Caching stores a static copy of your pages so WordPress doesn't have to rebuild them from the database on every visit. Recommended: WP Rocket (paid, best results) or W3 Total Cache (free). With W3 Total Cache: Go to Performance → General Settings → Enable: Page Cache, Minify, Browser Cache → Save all settings. With WP Rocket: Install and activate — default settings are already optimised for most sites. Enable 'Remove Unused CSS' and 'Defer JavaScript' from the dashboard.

Minification removes whitespace and comments from code files — reducing file size by 10–30%. In W3 Total Cache: Performance → Minify → Enable CSS and JS minification → Set combine method to 'Auto'. In WP Rocket: File Optimisation tab → Enable 'Minify CSS files' and 'Minify JavaScript files'. Test all pages after enabling — minification occasionally breaks page layouts.

Over time, WordPress accumulates post revisions, spam comments, transients, and orphaned data that bloat the database. Install 'WP-Optimise' → Run all three cleaners: • Database cleanup (post revisions, trashed posts, spam) • Image compression • Caching Schedule automatic weekly database cleaning.

Go back to Pingdom Tools → Test the same pages you tested in Step 1 → Compare: • Performance grade • Page size • Load time • Number of requests Document both before and after scores. If load time is still above 3 seconds, identify the heaviest remaining requests in Pingdom's waterfall view and address them individually.

Speed degrades over time as you add content and plugins. Set up automated monitoring: Option A (free): Google Search Console → Core Web Vitals report → Check monthly Option B (free): GTmetrix → Create a free account → Schedule weekly speed test reports to your email Option C (paid): WP Rocket's built-in monitoring