Service
Performance Optimization and Analytics
Speed directly impacts conversions. We use Vercel Analytics, Speed Insights, and custom monitoring to push your Core Web Vitals scores to near-perfect and keep them there.
Every 100ms of load time costs conversions. We use Vercel Analytics, Speed Insights, and custom real user monitoring to push Core Web Vitals scores to near-perfect and keep them there through every release.
What's included
- Core Web Vitals optimisation and monitoring
- Real user monitoring with Vercel Analytics
- Speed Insights integration and tracking
- A/B testing and conversion optimisation
- Custom dashboards and reporting
Key metrics
95+
Lighthouse score target
< 2.5s
LCP target
< 100ms
INP target
0
CLS target
How We Build It
A layered production architecture designed for reliability, performance, and maintainability.
Browser RUM
Real user data
Edge Cache
CDN + ISR
Speed Insights
CWV tracking
Vercel Analytics
Session data
Sentry
Error tracking
PostHog
A/B testing
Architecture varies per project — this represents our standard production pattern for this service.
Our Process
Baseline Audit
Real user monitoring data, Lighthouse CI, and WebPageTest to identify the highest-impact bottlenecks.
Prioritised Fixes
Ranked remediation plan with projected impact on Core Web Vitals and conversion rate.
Implementation
Image optimisation, bundle splitting, font loading, and edge caching implemented and verified.
Ongoing Monitoring
Continuous monitoring with alerts for regressions before they reach users.
Technology Stack
Why clients choose us
- End-to-end ownership — no agency hand-offs
- Architecture documented before any code is written
- Tests written alongside features, not as an afterthought
- Fixed-price phases with clear deliverables
What We Measure
Core Web Vitals
LCP, INP, and CLS tracked in production for real users across devices and connection speeds — not just lab conditions. We instrument before optimising so every change is validated with data.
Real User Monitoring
Vercel Analytics gives us field data from real sessions. We segment by country, device, and connection type to identify where the pain is and who feels it most.
Speed Insights Integration
Speed Insights surfaces p75 metrics for your actual traffic patterns. We use this alongside Lighthouse to build a complete picture of performance across your user base.
How We Optimise
Image and Asset Optimisation
Next.js Image component with proper sizing, format selection, and lazy loading. We audit every image on critical paths and eliminate render-blocking resources.
JavaScript Bundle Reduction
Code splitting, tree shaking, and dynamic imports to reduce the JavaScript your browser parses on load. We profile every bundle and target the heaviest offenders first.
Caching Strategy
Edge caching, CDN configuration, and HTTP cache headers tuned for each route type. Static assets get maximum cache TTLs; dynamic routes get stale-while-revalidate policies.
Database Query Optimisation
Slow queries surface as slow pages. We profile database execution plans, add missing indexes, and implement connection pooling to eliminate backend bottlenecks.
A/B Testing and Conversion Optimisation
We instrument experiments using Vercel Edge Middleware or PostHog so you can test layout, copy, and flow changes without sacrificing performance scores.
Ongoing Monitoring
We configure Sentry performance monitoring and custom alerting so performance regressions are caught in CI before they reach production, not discovered by users.
Technologies
Vercel Analytics, Speed Insights, Sentry, PostHog, Lighthouse, WebPageTest.
Start Your Performance Project
Share your current Lighthouse or CrUX data and we will produce a prioritised optimisation plan within 48 hours.
Ready to get started?
Let's build your fast applications that continuously improve.
Tell us what you need. We respond within one business day with a technical plan and realistic timeline — no sales pitch.
Start Your Project