Page speed optimization: 7 core techniques
Every second of delay can cut conversion rates by up to 7%. These are the 7 techniques the FUBATECH team applies to every project to keep websites fast.
Speed isn’t a technical metric. It’s the first experience a customer has with your brand. Google’s research shows that as load time grows from 1 to 3 seconds, the probability of a user bouncing increases by 32%. For e-commerce, every second of delay can cut conversion rates by up to 7%.
Here are the 7 core techniques FUBATECH applies to every project.
1. Optimize images properly
Images typically account for more than half of a page’s weight. Three things to do: switch to next-gen formats (WebP, AVIF), serve the right size per device, and lazy-load every image below the first screen.
2. Prioritize above-the-fold content
The browser should render what the user sees first as early as possible. Inline critical CSS, defer non-essential JavaScript, and preload key resources such as fonts and the hero image.
3. Keep JavaScript to a minimum
Every kilobyte of JavaScript must be parsed and executed on the user’s device. Modern architectures let you ship static HTML and “hydrate” JavaScript only where interaction is genuinely needed.
4. Self-host your fonts
Fonts loaded from third-party services add a render-blocking network connection. Self-hosting with font-display: swap makes text appear instantly, with no blank screen waiting for fonts.
5. Use a CDN and smart caching
Static content should be served from the server closest to the user. Combine a CDN with a sensible cache policy and repeat visits become nearly instant.
6. Measure with Core Web Vitals
You can’t optimize what you don’t measure. Three metrics to track continuously: LCP (main content render speed, target under 2.5s), INP (interaction latency, under 200ms), and CLS (layout stability, under 0.1).
7. Control third-party scripts
Embedded ads, chat widgets, and analytics are the most common culprits behind sites slowing down after launch. The rule: keep only the scripts you truly need, load them deferred, and review them regularly.
Closing thoughts
Speed optimization isn’t a one-time task but a discipline maintained across the website’s lifetime. A fast page doesn’t just retain customers. Search engines rank it higher, too.