Make your website faster. Make every interaction count.
A slow website costs more than a few milliseconds.
It creates friction, loses customers and makes your product feel harder to use.
Fly Fox helps businesses improve web performance through technical analysis, frontend optimisation and performance engineering — from Core Web Vitals and JavaScript bundles to caching, rendering and real-world user experience.
Performance isn't a feature. It's part of the experience.
Customers don't think about your JavaScript bundle or rendering strategy.
They simply notice when a page loads quickly — and when it doesn’t.
We look beyond a single Lighthouse score to understand how your website actually performs for real users.
Performance optimisation services
Core Web Vitals
Improve the metrics that matter for real-world user experience, including Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift.
Frontend Profiling
Analyse your application to identify expensive renders, unnecessary JavaScript, inefficient components and other frontend bottlenecks.
Bundle Optimisation
Reduce JavaScript and CSS payloads through code splitting, tree shaking, dependency analysis and smarter loading strategies.
Rendering Optimisation
Improve how and when content is rendered using techniques such as server-side rendering, static generation and progressive loading.
Image Optimisation
Reduce image weight without sacrificing visual quality through responsive images, modern formats, sizing and intelligent loading.
Caching
Design effective caching strategies across the browser, CDN, application and server to reduce unnecessary work and improve response times.
Third-Party Script Optimisation
Identify and control the performance impact of analytics, advertising, chat widgets and other third-party services.
Performance Audits
Get a clear picture of what's slowing your website down, why it's happening and what should be fixed first.
Measurement first, optimisation second
Performance optimisation isn't about randomly applying a list of best practices.
We start with measurement.
Measure
Establish a performance baseline using real-user data and controlled testing.
Profile
Investigate the frontend, network requests, rendering behaviour and application runtime.
Diagnose
Identify the bottlenecks that are actually affecting your users.
Optimise
Make targeted changes that address the underlying problem rather than treating the symptoms.
Validate
Measure again to understand whether the changes produced a meaningful improvement.
Monitor
Keep performance visible so regressions can be caught before they become a problem.
Signals for the quality of a website experience
Google's Core Web Vitals provide useful signals for understanding the quality of a website experience.
Good scores are useful.
But the goal isn't to chase a number.
The goal is a better experience for real people.
Performance and conversion are connected.
Every unnecessary delay adds friction to the customer journey.
That's particularly important for ecommerce.
A slow product page can interrupt discovery.
A sluggish interface can make browsing frustrating.
A delayed checkout interaction can create uncertainty.
We optimise performance with the entire customer journey in mind — not just the homepage.
An audit that tells you why, not just that
“Your website is slow.”
It should tell you why.
We investigate areas including:
JavaScript execution
React rendering
Component performance
Network waterfalls
Server response times
Image delivery
Font loading
Third-party scripts
Caching behaviour
API requests
Bundle composition
Rendering strategy
CDN configuration
Then we prioritise the changes based on their likely impact.
Opportunities across the entire stack
Modern web applications can be incredibly fast — but only when the architecture supports it. We work with technologies including React, Next.js, TypeScript and modern cloud infrastructure to identify opportunities across the entire stack.
Performance isn't only a frontend problem.
Sometimes the biggest improvement comes from the server.
Sometimes it's an API.
Sometimes it's a database query.
Sometimes it's a third-party script.
And sometimes the best optimisation is removing something entirely.
Engineering-led optimisation
Engineering-led optimisation
We don't treat performance as a collection of Lighthouse recommendations. We investigate how your application actually works and identify the technical causes behind performance problems.
Focused on impact
Not every optimisation is worth making. We prioritise improvements based on user impact, technical complexity and business value.
Measure what matters
Synthetic tests are useful, but real-user data tells a different story. Where available, we use both controlled testing and real-world performance data to understand the experience your customers are actually getting.
Built to stay fast
A one-off performance improvement isn't enough. We help establish patterns, tooling and monitoring that make it easier to prevent performance regressions as your product evolves.
You don't need to wait until it's obviously slow.
You don’t need to wait until your website is obviously slow.
Performance work can be valuable when:
Core Web Vitals are underperforming
Mobile users experience slow pages
JavaScript bundles have grown significantly
Your application has become harder to maintain
New features are affecting existing performance
Conversion rates are being affected by friction
A redesign has made the site heavier
Third-party scripts are slowing down the experience
You're preparing for a major traffic increase
Fast websites feel better.
They make products easier to use, reduce friction and give your customers more time to focus on what matters.
Fly Fox helps you understand where your performance is being lost — and turn those findings into measurable improvements.
IS YOUR WEBSITE SLOWER THAN IT SHOULD BE?
We'll analyse your website, identify the biggest performance opportunities and help you prioritise what to fix.