Museum of UX Fails: Why are people bouncing from your site? — Input Abyss: you click and nothing happens — Unfortunate Shift: the button jumps away — Slow Starter: it takes forever to load Do you have these exhibits on your website too? Check it out:

Welcome to the Museum | UX Speed Museum

The UX Speed Museum is a place to experience the visceral impact of performance bottlenecks. Here, we don't just measure metrics; we feel them. Explore our exhibits to understand why speed matters.

museum.uxspeed.dev

Want a lightning-fast website? A monthly newsletter full of web performance: 👉🏻 Technical tips and best practices 👉🏻 Case studies and business impact 👉🏻 Practical insights from our experience Subscribe to the PageSpeed.ONE newsletter👇🏻 pagespeed.one/en/newsletter

Slow website = lost revenue. 💸 Shopify data on Core Web Vitals (mirroring our PageSpeed.ONE clients) proves it: ⏱️ LCP: +100ms = -3.5% conversions 🖱️ INP: +32ms = -1.5% conversions 🔄 CLS: no direct impact Every millisecond matters. Full study 👇

Store Speed and Conversion: What the Data Shows (2026) - Shopify

How does site speed relate to sales? Find out in this Shopify data deep dive.

shopify.com

Why measure web performance with PageSpeed.ONE? — 24/7 Monitoring: A slow site kills SEO and revenue — Early Warnings: Detect issues before your customers do — Clear Trends: See the impact of your changes Try our monthly trial 👇🏻 pagespeed.one/en/app/new?t... #WebPerf #Monitoring

Setting up monitoring for a new website | PageSpeed.ONE

Enter the URL for your website's homepage and we'll run speed tests.

pagespeed.one

Headless sites: Performance for developers, a bottleneck for business? Jono Alderson argues that for most marketing sites, headless simply introduces an extra layer of approval cycles. — Slows down content publishing — Bottlenecks landing page creation — Limits rapid response

Headless websites and the cost of engineering vanity

Headless sounds like a route to freedom, but too often it just swaps one set of constraints for another, heavier one.

buff.ly

Is a #React-based website automatically fast? Unfortunately not. #WebPerf depends on the developer's work. In this article, we share tips on how to improve CWV metrics: — the impact of DOM size — the use of <Suspense> — Server Components Details in the link! 👇

Accelerate React: 6 Proven Tips for Optimizing Core Web Vitals | PageSpeed.ONE

React is a popular tool for developing modern websites, but speed and interactivity are not always automatic. In this article, we present key techniques for optimizing Core Web Vitals – from…

pagespeed.one

Chrome DevTools MCP automates performance audits? Joan Leon shows how: — Scripts measure LCP, CLS, INP → JSON — AI only interprets — Reproducible, no hallucinations

AI in Web Performance Audits: Deterministic Measurement and Actionable Reports | Joan León

How to combine deterministic scripts and AI agents to go from metrics collection to an actionable report, and lay the foundations for continuous regression testing in performance.

joanleon.dev

Monitoring site speed? You need to know the acronyms: #synth, #CrUX, and #RUM. — Synthetic monitoring = machines (Lighthouse). — CrUX = real users in Google Chrome. — RUM = custom data from all users. Learn more here: pagespeed.one/en/know-how/... Which type do you use?

Types of Web Speed Measurements: Synthetic, Chrome UX Report, and Real User Monitoring | PageSpeed.ONE

Let's clarify the differences between various types of web speed measurements. We’ll discuss synthetic data (“synth”), Google user data (“CrUX”), and data from all users (“RUM”).

pagespeed.one

A #WebPerf newsletter worth your time! Ours, of course. — News, tips, and deeper insights. — 3 carefully selected articles per month and a ton of extra tips. Subscribe here 👇🏻

Sign up for the PageSpeed.ONE newsletter.

Sign up for the PageSpeed.ONE newsletter.

pagespeed.one

Why have web performance monitoring? — It detects issues before they impact the business — It tracks the impact of changes on performance — One-off measurements are not enough If you don't measure, you don't improve! Read more in the article by Martin Michalek 👉

Web Speed Monitoring: Why It’s Crucial and How to Use It Effectively | PageSpeed.ONE

Occasional speed checks aren’t enough. Without continuous speed monitoring, hidden issues remain unseen, you lack historical data for analysis, and trends that can cost your site conversions and…

pagespeed.one

Vue.js is fast when used correctly — Developer errors hinder web performance — Architecture, optimization, testing — How to do it? → pagespeed.one/en/know-how/... Follow for more #WebPerf tips and content.

Vue.js and Nuxt.js Optimization: Tips and Tricks | PageSpeed.ONE

Enhance your Vue.js website speed with SSR, lazy loading, and other tips. Better performance means happier users and improved conversions.

pagespeed.one

The biggest PageSpeed.ONE release yet! 🚀 Introducing version 4.10: — New History page and measurement log — Manual test after deployment (beta) — More tests during the day (beta) — English documentation We are speeding up websites as well as our development. Details: pagespeed.one/en/changelog...

#WebPerf knowledge base is now global! 🌍 In PageSpeed.ONE we’ve translated ~100 in-depth articles to English. Enjoy the deep dive! ⚡️ 1️⃣ Know-how: pagespeed.one/en/know-how 2️⃣ Metrics: pagespeed.one/en/metrics 3️⃣ Blog: pagespeed.one/en/blog 4️⃣ Docs: pagespeed.one/en/documenta...

Our Michal has written an article about #React #performance for the renowned #WebPerf Calendar by @stoyan.org. 1) Reduce the DOM 🏗️ 2) Split components into two versions ✂️ 3) Use <Suspense> ⏳ 4) Beware of hydration errors 🚨 5) Watch out for useEffect() 👀 calendar.perfplanet.com/2024/5-tips-...

5 tips to effectively optimize INP in React

In this post, let's consider several optimization techniques for improving Core Web Vitals metrics for sites that are built with React. We are a team of speed consultants from the Czech Republic and ...

calendar.perfplanet.com

Introducing SpeedJar.com.