Web Performance Audit
The diagnosis of milliseconds that cost you (too) much
1 second too long means 10% fewer sales. Can we recover the rest?
Concrete results
A holistic approach
Reading a PageSpeed report is within reach of any developer, but understanding how to truly improve website performance is more complicated.
🎯 Focus on user experience
A fast site is a site that converts. The quality of your customers' experience can impact their trust in your brand.
📊 Optimization of Core Web Vitals
By improving web performance, you will meet Google's expectations. Good perceived performance will benefit from a bonus when ranking in search engines.
📋 Prioritized recommendations
For each point, tailored advice weighted by the difficulty of implementation and the expected gain.
🔍 Critical Rendering Path
Identification of resources blocking page rendering. Optimization of the critical rendering path using modern mechanisms.
📦 JS & CSS Bundles
Audit of the impact of your website's assets. The more the browser is stressed, the slower the pages and interactions will be for your users.
🌐 Third-party scripts
Third parties impact the main thread. The goal is not to remove them, but to optimize their loading and reduce their impact on user experience.
Measurable and sustainable improvements
How does a web performance audit work?
A website performance audit takes place in 3 key steps necessary to produce the most comprehensive deliverable possible.
Discovery and technical alignment
During this first video conference, we discuss the technical aspects of your website, your business objectives, and the strategic pages to audit as a priority.
Conducting the web performance audit
Using various tools, I conduct a complete audit of your site: WebPageTest, Chrome DevTools, YLT, analysis of JS/CSS bundles and third parties.
Presentation of the deliverable
Once the audit is complete, I will propose a second meeting via video conference to present the detailed report and answer all your questions.
Testing the recommendations
Once the implementation is complete, I check the proper implementation of the changes on your site.
Discovery and technical alignment
During this first video conference, we discuss the technical aspects of your website, your business objectives, and the strategic pages to audit as a priority.
Conducting the web performance audit
Using various tools, I conduct a complete audit of your site: WebPageTest, Chrome DevTools, YLT, analysis of JS/CSS bundles and third parties.
Presentation of the deliverable
Once the audit is complete, I will propose a second meeting via video conference to present the detailed report and answer all your questions.
Testing the recommendations
Once the implementation is complete, I check the proper implementation of the changes on your site.
Optimizations across dozens of technologies
Guaranteed measurable results
If the recommendations applied according to the report do not improve your Core Web Vitals within 30 days, I will redo the audit for free.
What my clients say
Excellent work.
Paul has significantly improved the site's speed and perfectly aligned it with Google's recommendations.
Professional, thorough, and efficient, I highly recommend.
Nicolas - April Moto
Digital & E-commerce Director
We are very satisfied with Paul's work. He is quick, available, and particularly effective. Since his arrival, very good results have been observed, both in terms of performance and responsiveness. A real asset for our team.
Léo - Maison de luxe
E-commerce Product Owner
I don't know if we've said it enough.
But if you want to improve your loading speed,
Make Google happy and get your Core Web Vitals in the green,
Contact Paul Delcloy.
Florian Darroman - Les Makers
Co-founder
Need something else?
Support for optimizing the speed and user experience of your website, e-commerce, or corporate site.
Continuous monitoring of web performance: tracking Core Web Vitals, real-time alerts, and regression detection.
Ready to accelerate?
Frequently Asked Questions
Why conduct a web performance audit?
What technologies do you work with?
Are the recommendations prioritized?
Why conduct a web performance audit?
A web performance audit is the essential starting point for any optimization effort. Without a precise diagnosis, improvement efforts may target the wrong levers. The audit identifies the true bottlenecks that slow down your site: resources blocking rendering, unoptimized images, overly heavy third-party scripts, ineffective server requests.
Automated tools like PageSpeed Insights provide a score, but rarely the keys to understand and resolve issues. An expert audit goes further by analyzing the complete technical context: front-end architecture, critical rendering path, impact of third parties, and actual user behavior.
Core Web Vitals: the metrics that matter
Google evaluates your site's performance through three key metrics: LCP (Largest Contentful Paint) measures the speed of displaying the main content, INP (Interaction to Next Paint) assesses responsiveness to user interactions, and CLS (Cumulative Layout Shift) quantifies the visual stability of the page.
These metrics are not just technical indicators: they directly reflect your users' experience and influence your ranking in search results. A detailed audit of each metric allows for a precise understanding of what degrades them and how to remedy it.
From audit to actionable recommendations
Each point identified during the audit is accompanied by concrete recommendations, classified by impact and implementation difficulty. This prioritization allows your teams to focus on quick wins before tackling more complex optimizations.
The deliverable includes comparative screenshots, quantified measurements, and detailed technical instructions. The goal is for each recommendation to be directly actionable by your developers, without ambiguity.
Beyond the report: comprehensive support
The audit does not stop at the delivery of the report. A presentation session allows us to go through each point with your teams, answer questions, and collaboratively define the optimization roadmap. If necessary, I can also directly assist with the implementation of recommendations or support your developers in their execution.