Lighthouse tells you what a page can do. CrUX shows a slice. WebPageTest benchmarks a single run. None of them show what your users are actually experiencing. Eroan Boyer: "There is no choice. You have to use RUM." #WebPerformance #RUM
Request Metrics
@requestmetrics.com
Integrated Web Performance Monitoring 👉 https://requestmetrics.com/
The dashboard was flat for weeks. Then LCP spiked. That moment is exactly what weekly RUM monitoring is for. Not just knowing something changed, but being able to trace when, where, and why. #CoreWebVitals #LCP
Green across the board does not mean no problems. It means no problems on average. Edge cases hide in the aggregate. Specific devices, referral sources, page groups. Real user data is how you find them. #WebPerformance #RUM
CLS is one of the hardest metrics to debug. You see the score. You don't know what's moving. @eroan.bsky.social found the root cause, the specific element, on a new client site in 10 minutes with Request Metrics. #CoreWebVitals #CLS
Synthetic tools show what a page can do. RUM shows what your users actually get. @eroan.bsky.social, in 10 years in web performance: "There is no choice. You have to use real user monitoring." #WebPerformance #RUM
Web performance agencies bill by the hour. Every hour spent hunting a root cause is one not spent fixing. @eroan.bsky.social found a CLS cause in 10 minutes on his first day with Request Metrics. Pages, element, fix. #WebPerformance #CLS
Your Speed Index is bad but the page looks fine? Lighthouse records a video of your page loading and scores how fast the viewport fills in. Not just the first pixel, the whole visual experience. requestmetrics.com/web-performa... #WebPerf
Understanding Lighthouse: Speed Index
Lighthouse says: "Speed Index shows how quickly the contents of a page are visibly populated." It sounds simple. It is not. Here's what it actu...
requestmetrics.com
Lighthouse’s “First Meaningful Paint” sounds important. It isn’t. It’s deprecated, misleading, and still confusing people into fixing the wrong stuff. Here’s what FMP actually was, why Google killed it, and what to watch instead. requestmetrics.com/web-performa... #webperf #corewebvitals
Understanding Lighthouse: First Meaningful Paint
Lighthouse says: "First Meaningful Paint measures when the primary content of a page is visible." But FMP is deprecated. Here's why Google kill...
requestmetrics.com
Your hero image takes 5 seconds to show up? Users already hit the back button. That's Largest Contentful Paint killing your conversions and search rankings. Here's how to fix it: requestmetrics.com/web-performa... #WebPerf #CoreWebVitals
Understanding Lighthouse: Largest Contentful Paint
Lighthouse says: "Largest Contentful Paint marks the time at which the largest text or image is painted." Here's what that means, why it matter...
requestmetrics.com
First Contentful Pain would be a good name for a talk on front end metrics...
Request Metrics@requestmetrics.com · 7mo agoFirst Contentful Paint isn't about speed. It's about trust. Every millisecond of blank screen makes users wonder if your site is broken. Under 1.8 seconds tells them "I got you, content is coming." requestmetrics.com/blog/lightho... #WebPerf #CoreWebVitals
First Contentful Paint isn't about speed. It's about trust. Every millisecond of blank screen makes users wonder if your site is broken. Under 1.8 seconds tells them "I got you, content is coming." requestmetrics.com/blog/lightho... #WebPerf #CoreWebVitals
Understanding Lighthouse: First Contentful Paint
What does "First Contentful Paint marks the time at which the first text or image is painted" mean in Lighthouse? This metric tells you how long us...
requestmetrics.com
Missing the viewport meta tag? Your mobile users are waiting an extra 300ms on every single tap. Browsers add that delay to check for double-tap zooming. One line of HTML fixes it. requestmetrics.com/blog/lightho... #WebPerf #SEO
Understanding Lighthouse: Has a Viewport Meta Tag
What does "Has a meta name viewport tag with width or initial-scale" mean in Lighthouse? This audit checks if your page is mobile-ready. Missing it...
requestmetrics.com
Most web servers ignore URL casing. But Node and Python don't. If /User/Profile and /user/profile are different routes in your app, our new "Preserve Casing" setting keeps them separate in your reports. requestmetrics.com/blog/product... #WebPerf #WebDev
New Option: Preserve URL Casing
Request Metrics normalizes URLs to lowercase by default. But some frameworkstreat casing as meaningful. Now you can preserve the original casing with anew se...
requestmetrics.com
Third-party scripts work fine in tests but cause real user pain: Analytics blocking rendering Chat widgets slowing interactions Payment lag RUM catches this. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #ThirdParty
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Complete performance strategy: 🧪 Synthetic testing in development 👥 RUM in production 🔍 Investigate with synthetic ✅ Validate with RUM https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #WebDev
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Gmail scores terribly on Lighthouse despite being one of the snappiest web apps ever built. Context matters for performance measurement. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebDev #Performance
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Synthetic testing: "Your site loads in 1.2 seconds! 🎉" Real users: "This page is taking forever..." 😤 RUM bridges this gap. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #UserExperience
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Performance issues only RUM can catch: 🔍 Device-specific problems 🌍 Geographic gaps 💰 Traffic spike disasters 📱 Progressive degradation https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #RealUserMonitoring
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Lighthouse simulates an "85th percentile user" but their simulation is usually wrong for your audience. RUM shows you YOUR users' reality. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebDev #Performance
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Chrome User Experience Report is like the lite beer of Real User Monitoring 🍺 Better than nothing, but lacks the substance you need for real decisions. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #CoreWebVitals
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Your CDN looks great in tests but European users get 3x slower load times. Your checkout tests perfectly but mobile users abandon carts due to lag. This is why you need RUM. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #UX
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
That moment when your Lighthouse score is 💯 but users are still complaining about slow pages... Stop guessing, start measuring what they actually experience. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebDev #Performance
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
🚨 Plot twist: 50% of websites with perfect Lighthouse scores still fail Core Web Vitals for real users. Your synthetic tests run in a perfect bubble. Your users live in the real world. https://requestmetrics.com/web-performance/you-need-rum-to-understand-web-perf/ #WebPerf #RealUserMonitoring
Why You Need Real User Monitoring to Really Understand Your Web Performance
Synthetic testing shows perfect scores, but users complain your site is slow. Real User Monitoring reveals the gap between lab performance and real-world exp...
requestmetrics.com
Jordan Griffin discusses lowering the barrier to getting user feedback during the redesign of TrackJS . youtube.com/shorts/e4URn... Learn more about the TrackJS redesign 👇 trackjs.com/blog/a-fresh...
Lowering the barrier to user feedback #coding #programming #webdesign #debugging
YouTube video by TrackJS
youtube.com
Discover why Time to First Byte (TTFB) is crucial for website speed in this essential Concepts of Web Performance tutorial with @toddhgardner.com from Request Metrics.
What is Time to First Byte (TTFB) - The Concepts of Web Performance
YouTube video by Request Metrics
youtube.com
Master the art of loading JavaScript efficiently in this essential Concepts of Web Performance tutorial with @toddhgardner.com from Request Metrics. youtu.be/vS3-1RQecEE
Loading JavaScript on your Website - Concepts of Web Performance
YouTube video by Request Metrics
youtu.be
@duffeh.bsky.social wrote about focusing on the experience of your real users instead of SEO for web performance. He quoted my work on Keyword Vitals that it might not matter for your keywords. https://iankduffy.com/articles/web-performance---prioritising-user-experience-ahead-of-search-rankings/
Web Performance - Prioritising User Experience ahead of Search Rankings
Astro description
iankduffy.com
David Jacobs at Axos Bank uses Request Metrics to make their websites fast and usable. "The engineering team behind this make Request Metrics an incredible value. I cannot recommend enough."
