How it started

It was in March. The site I'd been working on for three weeks was performing fine on my laptop. The moment I checked it on cellular, everything fell apart — TTFB over a second and a half, Largest Contentful Paint near five seconds. Not "needs improvement." Bad.

What I tried first

My instinct was to throw more caching at the problem. I installed WP Rocket, switched on every aggressive option I could find, and called it a day. Speed test scores went up by exactly seven points. Real-world load times didn't move. That's the thing about caching plugins: they make synthetic benchmarks look good while doing very little for the parts of a page that genuinely matter.

What actually moved the needle

Three things, in this order:

Removing four plugins I wasn't really using. One — a popup builder I'd installed for a single A/B test six months earlier — was loading 180KB of JS on every page. I never disabled it after the test ended. That alone shaved 600ms off mobile load.
Switching from a 4096px hero image (compressed to JPEG at 85%) to a 1920px AVIF. Same visual quality. About 75% smaller file size. Saved another 1.2 seconds on slow connections.
Moving from shared hosting to Cloudways DigitalOcean. I'd been holding off because of the price difference, but the math worked out: a $12/month Cloudways plan outperformed a $15/month shared plan because the shared plan was throttling under load.

The result

Site went from a Lighthouse mobile score of 41 to 89. TTFB dropped from 1.7s to 380ms. Largest Contentful Paint settled at 1.4s on slow 4G. Bounce rate dropped 18% over the next month.

What I'd tell someone facing the same situation

Stop optimizing before you've measured. Use WebPageTest from your real audience's location, not from your laptop on Wi-Fi. The most expensive plugin you have is probably the one you're not actively using. Audit your active plugin list every three months. Half will be candidates for deletion.

If you want to dig deeper, I keep a running list of plugins I actually install. It's short. That's the point.

— The RevealTheme Team