Case Study: How We Cut Homepage Load Time by 65% Without a Redesign

By Paul Anthony · October 15, 2025

A local business came to us with a slow homepage (10+ seconds on mobile) and a high bounce rate. They didn’t want a redesign — they wanted results. Here’s what we did.

Audit & baseline

We ran Lighthouse and WebPageTest. Main issues: unoptimized hero image, render-blocking JavaScript, multiple unused plugins, and a large third-party font.

High-impact fixes (in order)

  1. Replace hero JPG (1.8MB) with responsive WebP variants (120–300KB) and add width/height.
  2. Defer non-critical third-party scripts and move them below the fold.
  3. Consolidate CSS and inline critical CSS for the hero area.
  4. Replace a heavy slider plugin with a static hero and a light JS-driven slider only for larger screens.
  5. Remove two unused plugins and replace another with a lightweight alternative.

Results

  • First Contentful Paint improved from 3.2s → 0.8s
  • Largest Contentful Paint improved from 6.5s → 1.6s
  • Homepage load size reduced by 65%
  • Bounce rate improved by 18% in the weeks after.

Start with images and blocking JS — those are often the low-hanging fruit.

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