Core Web Vitals

Improve LCP, INP and CLS without chasing a vanity score.

Core Web Vitals provide useful signals about loading, responsiveness and visual stability, but they need to be interpreted in the context of the actual site. We identify the components, scripts, images and delivery choices affecting real-user performance.

Where we add value

Core Web Vitals shaped around the problem, not a generic package

Every core web vitals requirement has a different starting point. We review the existing environment, the people who use it, the systems it depends on and the commercial outcome before deciding what should be built or changed.

That discovery matters because technical shortcuts often move cost into support, manual work or future redevelopment. Our aim is to make the solution understandable, maintainable and appropriate to the risk.

LCP diagnosis

Identify the actual largest-content element and the network/render path delaying it.

INP improvement

Reduce long main-thread tasks and expensive interaction handlers.

CLS control

Prevent unexpected movement caused by media, fonts, banners and late-rendered UI.

Field-data focus

Use real-user data where available rather than relying only on one laboratory test.

What we can deliver

Practical core web vitals delivery from discovery through support

Midoriweb can own a complete workstream or integrate with an existing team. Scope can cover a new build, a defined improvement, recovery work or ongoing development capacity.

  • LCP analysis
  • INP analysis
  • CLS analysis
  • Image and font delivery
  • JavaScript reduction
  • Critical rendering path work
  • Third-party script review
  • Monitoring after release
How we work

Start with clarity, then build in controlled increments

We favour clear requirements, visible priorities and reviewable releases. Where uncertainty exists, we reduce it before committing to a large build.

Testing, documentation, version control, deployment planning and communication are treated as part of delivery rather than optional extras added at the end.

Technical coverage

Technology selected around the requirement

The exact stack depends on the current system and the work required. We can combine core Midoriweb expertise with specialists from our wider engineering team when a project needs additional skills.

LCPINPCLSPageSpeed InsightsChrome UX ReportJavaScriptCSSImagesFontsCDN
Engagement options

Choose the level of ownership you need

Some clients need a complete managed project; others need experienced capacity inside an existing team. We support both models.

Managed project

Midoriweb owns an agreed scope, coordinates delivery and provides a clear route from discovery to release.

Specialist workstream

Bring us into one defined area such as frontend, backend, integrations, performance or infrastructure.

Team augmentation

Add one or more developers to increase capacity for a fixed period or ongoing roadmap.

Ongoing technical partner

Combine support, maintenance, improvements and roadmap delivery in a continuing engagement.

Frequently asked questions

Questions to consider before you start

Can you guarantee green Core Web Vitals?

No. We can identify and improve technical causes, but results can also be affected by third-party scripts, content and user devices.

Are Lighthouse and field data the same?

No. Lighthouse is a controlled lab test while field data reflects real users over time.

Can Core Web Vitals work improve SEO?

They are one part of page experience. The larger value is usually a faster, more stable user experience.

Do you work on eCommerce sites with lots of scripts?

Yes. Tag managers, personalisation, reviews, payments and marketing scripts are common performance constraints that need commercial trade-offs.

Related expertise

Explore connected services

Need help with core web vitals?

Send the current situation, required outcome and any important deadlines. We can review the requirement or discuss it in a short consultation.