Tammy Everts 🍁
@tammyeverts.com
I contain multitudes, but for brevity: reader, writer, speaker, baker, quilter, yoga-er, mom-joke teller, lover of lakes and mountains.
🫶 Building #UX / #webperf / #o11y community at @embrace.io (which acquired @speedcurve.com)
🫶 Co-chair of @perfnow.nl
🫶 Building #UX / #webperf / #o11y community at @embrace.io (which acquired @speedcurve.com)
🫶 Co-chair of @perfnow.nl
Pinned
Tammy Everts 🍁
@tammyeverts.com
· Oct 29
If you want to know the real me, then you need to know that at any given time, roughly 10% of my processing power is revving on the subject of quilts and quilting. I typically have multiple projects in various states of completion. Here's a sampling of quilts I've finished over the past few years.
Reposted by Tammy Everts 🍁
The core argument from an upcoming piece; something I've come to view as nearly an iron rule in BigCo's:
Going from decent to excellent performance is a technical challenge, but moving from poor to decent performance is fundamentally a management and culture problem.
Going from decent to excellent performance is a technical challenge, but moving from poor to decent performance is fundamentally a management and culture problem.
August 19, 2026 at 10:42 PM
The core argument from an upcoming piece; something I've come to view as nearly an iron rule in BigCo's:
Going from decent to excellent performance is a technical challenge, but moving from poor to decent performance is fundamentally a management and culture problem.
Going from decent to excellent performance is a technical challenge, but moving from poor to decent performance is fundamentally a management and culture problem.
Reposted by Tammy Everts 🍁
Going fast enough to become "dial tone" changed user behaviour and expectations in a hugely positive way for the product.
The "no such thing as too fast until you prove it" lesson is everywhere, and anyone who tells you that you can just add an animation and move on is a danger to your product.
The "no such thing as too fast until you prove it" lesson is everywhere, and anyone who tells you that you can just add an animation and move on is a danger to your product.
July 15, 2026 at 11:45 PM
Going fast enough to become "dial tone" changed user behaviour and expectations in a hugely positive way for the product.
The "no such thing as too fast until you prove it" lesson is everywhere, and anyone who tells you that you can just add an animation and move on is a danger to your product.
The "no such thing as too fast until you prove it" lesson is everywhere, and anyone who tells you that you can just add an animation and move on is a danger to your product.
Reposted by Tammy Everts 🍁
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
July 17, 2026 at 6:09 PM
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.
Reposted by Tammy Everts 🍁
Soooo hire me to make your website even faster than you think it needs to be???!
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…
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
July 15, 2026 at 11:53 PM
Soooo hire me to make your website even faster than you think it needs to be???!
Reposted by Tammy Everts 🍁
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...
-> embrace.io/blog/researc...
July 16, 2026 at 11:27 AM
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...
-> embrace.io/blog/researc...
Reposted by Tammy Everts 🍁
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…
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
July 15, 2026 at 11:32 PM
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…
embrace.io/blog/research-co…
Reposted by Tammy Everts 🍁
⚡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
✨ 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
June 14, 2026 at 12:04 PM
⚡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
✨ 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
Reposted by Tammy Everts 🍁
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
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
May 28, 2026 at 4:17 PM
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
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
Reposted by Tammy Everts 🍁
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
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
April 7, 2026 at 7:51 PM
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
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
So here's your slime mold of the day – elaeomyxa ceriferaour – via citizen scientist and author Sarah Lloyd.
sarahlloydmyxos.wordpress.com
March 16, 2026 at 7:48 PM
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
So here's your slime mold of the day – elaeomyxa ceriferaour – via citizen scientist and author Sarah Lloyd.
sarahlloydmyxos.wordpress.com
Reposted by Tammy Everts 🍁
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...
#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...
www.youtube.com
March 11, 2026 at 3:37 PM
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...
#webperf
www.youtube.com/playlist?lis...
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
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.
www.speedcurve.com
March 4, 2026 at 6:57 PM
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
Here's why that takeaway is relevant in an increasingly competition online landscape 👉 www.speedcurve.com/blog/brand-p...
#webperf #ux #pagespeed
Reposted by Tammy Everts 🍁
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
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
March 1, 2026 at 4:07 PM
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
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
😂 but also 🥳
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...
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...
It's Alive! - Patrick Meenan's Blog
Post from February 27, 2026
blog.patrickmeenan.com
February 27, 2026 at 9:52 PM
😂 but also 🥳
This is a very good read.
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...
margaretstorey.com/blog/2026/02...
How Generative and Agentic AI Shift Concern from Technical Debt to Cognitive Debt
The term technical debt is often used to refer to the accumulation of design or implementation choices that later make the software harder and more costly to understand, modify, or extend over time...
margaretstorey.com
February 22, 2026 at 10:48 PM
This is a very good read.
Reposted by Tammy Everts 🍁
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
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
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...
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
February 19, 2026 at 9:31 PM
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
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
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...
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
February 19, 2026 at 9:19 PM
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...
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...
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...
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?
www.speedcurve.com
February 18, 2026 at 8:31 PM
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...
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...
Reposted by Tammy Everts 🍁
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
February 17, 2026 at 11:14 PM
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...
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/
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.
www.speedcurve.com
February 17, 2026 at 6:23 PM
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/
www.speedcurve.com/blog/fast/
Reposted by Tammy Everts 🍁
if you want stable and reliable software, give developers stable and reliable employment
January 13, 2026 at 4:35 PM
if you want stable and reliable software, give developers stable and reliable employment
Reposted by Tammy Everts 🍁
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...
⭐ 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.
www.speedcurve.com
January 12, 2026 at 7:15 PM
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...
⭐ 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...
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...
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.
www.speedcurve.com
December 18, 2025 at 10:29 PM
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...
www.speedcurve.com/blog/2025-we...
WKRP Turkey Drop
YouTube video by Brian Henigin
www.youtube.com
November 26, 2025 at 10:15 PM
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...
😀 No code changes required
😀 Literally takes just 1-2 minutes
😀 You get alerts if your pages slow down
👉 www.speedcurve.com/web-performa...
November 25, 2025 at 7:56 PM
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...
😀 No code changes required
😀 Literally takes just 1-2 minutes
😀 You get alerts if your pages slow down
👉 www.speedcurve.com/web-performa...