How We Cut Page Load Times by 60% for a SaaS Client
A behind-the-scenes look at the exact optimizations — from image pipelines to code splitting — that made the biggest difference.
A client came to us with a marketing site that was technically working, but felt slow — and their own analytics confirmed it: a 4.2 second average load time on mobile, with bounce rates climbing month over month.
Auditing before touching anything
Before changing a line of code, we ran a full performance audit — bundle size, image weights, third-party scripts, and server response time. The biggest single offender turned out to be unoptimized images served at full resolution regardless of viewport size.
The fixes that actually moved the number
We rebuilt the image pipeline to serve properly sized, modern-format images, split the JavaScript bundle so pages only load what they need, and removed three third-party scripts that weren't earning their weight.
| Fix | Impact |
|---|---|
| Modern image formats + sizing | Largest single improvement |
| JavaScript code splitting | Faster interactivity |
| Removed unused third-party scripts | Smaller main-thread load |
Mobile Load Time: Before vs. After
The result: load time dropped from 4.2s to 1.6s — a 60% improvement — with no visual changes to the site at all. Bounce rate dropped noticeably within the first month.
The lesson that generalizes: performance work is rarely one big fix. It's usually five or six smaller ones, found by actually measuring instead of guessing.
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