The research done by @tammyeverts.com about rules of thumb for good perf not being universal is on the web only, but I bet my bottom dollar that the same holds for mobile: that if your perf targets, ceiling or floor, are not based on your specific app and user base, you might want to reassess.

New research: The Core Web Vitals thresholds you trust might be wrong for your site

Core Web Vitals data from ten leading online retailers reveals that "good" for Google may not be good enough for your users or your business.

embrace.io

Soooo hire me to make your website even faster than you think it needs to be???!

ᴀʟᴇx ʀᴜssᴇʟʟ@infrequently.org · 3w ago

If you make websites for a living, stop what you're doing and read this research by @tammyeverts.com; it shows what many of us have been saying for a long time: even if there is such a thing as "fast enough", it's generally *much* faster than you are targeting: embrace.io/blog/research-co…

Is the 2.5s LCP that's "good" really ideal for your site? This is a cool look at how you can compare bounce rate with LCP (from Core Web Vitals), to find the spot that's really ideal for your specific site. -> embrace.io/blog/researc...

New research: The Core Web Vitals thresholds you trust might be wrong for your site

Core Web Vitals data from ten leading online retailers reveals that "good" for Google may not be good enough for your users or your business.

embrace.io

ᴀʟᴇx ʀᴜssᴇʟʟ@infrequently.org · 3w ago

If you make websites for a living, stop what you're doing and read this research by @tammyeverts.com; it shows what many of us have been saying for a long time: even if there is such a thing as "fast enough", it's generally *much* faster than you are targeting: embrace.io/blog/research-co…

If you make websites for a living, stop what you're doing and read this research by @tammyeverts.com; it shows what many of us have been saying for a long time: even if there is such a thing as "fast enough", it's generally *much* faster than you are targeting: embrace.io/blog/research-co…

New research: The Core Web Vitals thresholds you trust might be wrong for your site

Core Web Vitals data from ten leading online retailers reveals that "good" for Google may not be good enough for your users or your business.

embrace.io

⚡Featured posts this week: ✨ HTML-first site doubled our users: @moh-kohn.eurosky.social ✨ AI Doesn't Write Good Software: @adrianferrera.dev ✨ Web perf measurement is necessary: @tammyeverts.com ✨ Why are we not using Service Workers?: @neciudan.dev 🙏 Special thanks to the authors! #webperf

Mobile teams deserve their Core Web Vitals moment. That’s why Embrace is building Core Mobile Vitals: a rigorous, user-focused framework for understanding mobile app performance through the experiences users actually notice. Read more from @tammyeverts.com: shorturl.at/5A8Ye

Houston, we have a 500 🚨 Join @tammyeverts.com and @cliffcrocker.bsky.social for a live session on how the best engineering teams use synthetic + RUM together. 🗓 April 9 | 10am PT 📍https://shorturl.at/fGM09

I've been fascinated by slime molds for years. When my kids were little, I'd show them slideshows online for fun. (To their credit, they also found them cool.) So here's your slime mold of the day – elaeomyxa ceriferaour – via citizen scientist and author Sarah Lloyd. sarahlloydmyxos.wordpress.com

Videos from our last meetup are now live! Check out the talks by @tammyeverts.com and @paulcalvano.bsky.social ! #webperf www.youtube.com/playlist?lis...

Episode 10 | PerformanceObserver - YouTube

In this episode, Paul Calvano dives deep into querying the HTTP Archive dataset to uncover web trends, while Tammy Everts breaks down the "Performance Platea...

youtube.com

A slow UX affects people’s perception of three important brand elements that are completely unrelated to page speed: content, design, and usability. Here's why that takeaway is relevant in an increasingly competition online landscape 👉 www.speedcurve.com/blog/brand-p... #webperf #ux #pagespeed

SpeedCurve | The speed of trust: How slow pages hurt your brand

In a competitive market, page speed is as important as your design and content.

speedcurve.com

Finally got round to publishing my article on implementing faster/better cookie consent banners: lessonsofacto.com/articles/006... It's a lot (>3700 words!) so there's a demo site here: cookie-consent-example.netlify.app and the heavily-commented code is here: github.com/ryantownsend... #webperf

Taming The Cookie Consent Monster

lessonsofacto.com

😂 but also 🥳

Patrick Meenan@patmeenan.com · 5mo ago

Wow, I SUCK at blogging. It has been 12 YEARS since my last post! I've been wanting to move off of blogger to a modern SSG framework for a while but never had the time or energy to. Luckily, that's one of the things the current AI tools are really good at: blog.patrickmeenan.com/2026/02/27/i...

This is a very good read.

Dave Rupert@davatron5000.bsky.social · 5mo ago

Glad to stumble upon this post by Margaret-Anne Storey. It echos some of my recent experiences with Generative AI. It's very quick to spin up something that is quite large and complex and you don't know how it works. And a lack of understanding is technical debt. margaretstorey.com/blog/2026/02...

Save the date! 🤩 The next @performanceobserver.dev will be on February 26 at 6:30 PM CET (12:30 PM ET / 9:30 AM PT) All the details and "add to calendar" links in performanceobserver.dev

Tammy Everts 🍁@tammyeverts.com · 6mo ago

So excited to be paired with @paulcalvano.bsky.social for this double-header on PerformanceObserver next week! Paul will take a deep dive into the HTTP Archive. Then I'll break down the "performance plateau" – why you need to know it and how to find it. performanceobserver.dev/events/episo...

So excited to be paired with @paulcalvano.bsky.social for this double-header on PerformanceObserver next week! Paul will take a deep dive into the HTTP Archive. Then I'll break down the "performance plateau" – why you need to know it and how to find it. performanceobserver.dev/events/episo...

Querying the HTTP Archive and finding your Performance Plateau | PerformanceObserver

In this episode, Paul Calvano dives deep into querying the HTTP Archive dataset to uncover web trends, while Tammy Everts breaks down the "Performance Plateau", explaining why identifying your specifi...

performanceobserver.dev

I ❤️ when #webperf data stops being theoretical and starts speaking language that business understands. This post breaks down how to connect site speed with real outcomes like conversion rate, bounce rate, and revenue. www.speedcurve.com/blog/site-sp...

SpeedCurve | Correlation charts: Connect the dots between site speed and business success

If you could measure the impact of site speed on your business, how valuable would that be for you?

speedcurve.com

Many organizations are coming up on performance review season (I'm getting lots of requests for my feedback workshops!) so here's a roundup of my resources on giving _and_ receiving feedback: larahogan.me/resources/fe...

Feedback and Performance Reviews Resources for Managers

Many of us fear messing up these awkward (yet important) conversations. But everyone deserves clear feedback!

larahogan.me

In our rush to align page speed with SEO and business metrics, have we in the #webperf community lost our way? In this post, based on the keynote I gave at #PerfNow a few months ago, I explore how it's not too late to bridge the gap between pragmatism and user delight. www.speedcurve.com/blog/fast/

SpeedCurve | How fast is fast enough? Rethinking web performance in pragmagical terms

Always remember: We're in the business of creating experiences for other humans.

speedcurve.com

if you want stable and reliable software, give developers stable and reliable employment

ICYMI, here's a wrap-up of exciting #webperf and #ux highlights from 2025! ⭐ Broad browser support for LCP and INP (W👀T!) ⭐ New metrics & visuals for measuring user happiness ⭐ Deeper metrics for JS diagnostics ⭐ Better budgets = easier regression-fighting www.speedcurve.com/blog/2025-we...

SpeedCurve | 2025 was a big year! Here are some highlights...

From broad browser support for key metrics to nuanced metrics for diagnosing issues, 2025 has been filled with wins.

speedcurve.com

I ❤️ writing these annual wrap-up posts. From broad browser support for key metrics to nuanced metrics for diagnosing issues, 2025 has been filled with huge wins — not just for @speedcurve.com but for our entire #webperf community. Go, us! www.speedcurve.com/blog/2025-we...

SpeedCurve | 2025 was a big year! Here are some highlights...

From broad browser support for key metrics to nuanced metrics for diagnosing issues, 2025 has been filled with wins.

speedcurve.com

IYKYK www.youtube.com/watch?v=BGFt...

WKRP Turkey Drop

YouTube video by Brian Henigin

youtube.com

If you only have time to do ONE THING to make your site holiday-ready (so you can relax and enjoy the next few days off) it's this: CREATE PERFORMANCE BUDGETS 😀 No code changes required 😀 Literally takes just 1-2 minutes 😀 You get alerts if your pages slow down 👉 www.speedcurve.com/web-performa...

What happens when observability merges with front-end performance monitoring? You get the best of all worlds — performance, reliability, and UX across web and mobile! Join our founder @markzeman.com, CPO @cliffcrocker.bsky.social, and @embrace.io President Andrew Tunall on December 9 to learn more!

Embrace@embrace.io · 9mo ago

🔥 Fireside chat: The future of user-focused #observability With the Embrace + @speedcurve.com acquisition now live, hear what’s ahead from Andrew Tunall, Mark Zeman, and Cliff Crocker. 📅 Dec 9 at 11 AM PST 📍 Save your seat ➔ ow.ly/M6QQ50XvcB2

It's been almost three years, but CrystalCon, the accessibility conference created from spite, is back. This January, I'm giving you six sessions of content over two days, all made by me. Given the current state of tech and digital accessibility, most sessions will focus on artificial intelligence.

Thanks to all who joined me and @seancdavis.com for our #PixelPalooza fireside chat about how image optimization (and lack thereof) affects your users and your business! And thanks to @remotesynthesis.com for inviting me! I put together some interesting stats here: speakerdeck.com/tammyeverts/...

The Hidden Cost of Media on the Web [PixelPalooza 2025]

Images, video, audio and other media are a big part of what brings the web to life and visitors have come to expect a multimedia experience across the w…

speakerdeck.com

Unoptimized images are STILL a common problem, and they hurt things like: 🙁 #A11y 🙁 #webperf and #UX metrics like LCP and CLS 🙁 Conversions 🙁 #SEO 🙁 Sustainability I'll be talking about this (and solutions!) today (12:15pm PT / 3:15pm ET) at #PixelPalooza. Get your FREE ticket: lnkd.in/g_N8YFrs

Third parties represent a MASSIVE potential single point of failure for your site. 1. AUDIT & remove unused tags 2. DEFER or load asynchronously 3. TRACK scripts & create #webperf budgets 4. KNOW your SLAs with vendors 5. CREATE a playbook for failures 👉 www.speedcurve.com/web-performa... #ux

Third-Party Web Performance | SpeedCurve

Ads, analytics, and social widgets can seriously hurt page speed. Find out how to measure and optimize the third parties on your pages.

speedcurve.com

If your backend times are slow, that hurts all your other key performance and UX metrics, including Core Web Vitals! Find out how to track your CDN's health and get backend transparency — along with 24 more holiday readiness tips! #corewebvitals #webperf #ux #sitespeed #pagespeed

SpeedCurve@speedcurve.com · 9mo ago

🎄 Holiday Readiness Tip 7: Track your CDN! CDN performance can be a black box. Did you know you can track CDN health using Server Timing headers? 👉 How to get backend transparency from your CDN: www.speedcurve.com/blog/server-... 👉 More holiday readiness tips: www.speedcurve.com/blog/holiday...

The "i" in "iPhone" stands for "inequality", late 2025 edition: