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SpeedCurve @speedcurve.com · 8h

😂

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SpeedCurve @speedcurve.com · 1d

Yoda (from Star Wars, if that needs to be clarified) with the text "Patience you must have."

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SpeedCurve @speedcurve.com · 1d

We just added @csswizardry.com to our Web Performance Heroes starter pack! (Yes, it's a bit late, but better late than never.)

Every month, we honour a new hero and add them to this list. Follow along and meet the folks without whom the web would be a sadder and slower place.

go.bsky.app/FTbRtFk

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · 7d

Every fall I hear so much FOMO from folks who missed @perfnow.nl. Don't let it happen to you!

We have amazing speakers sharing the newest best practices for the #webperf topics you care about: AI, APIs, #a11y, CSS, JS, frameworks, tools, culture, workflows & more!

Get your tickets soon! perfnow.nl

performance.now(); 30th and 31st of October, Amsterdam

On 30th and 31st of October, 2025, the sixth edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.

perfnow.nl

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · 23d

How fast is fast enough? I'll be exploring this question in my #PerfNow keynote. I hope to see you there! And if you have your own thoughts on this question, I'd love to hear them!

#webperf #sitespeed #pagespeed #ux

performance.now() conference @perfnow.nl · 23d

performance.now() is coming!

@tammyeverts.com asks a seemingly-simple question: How Fast Is Fast Enough? She'll touch on questions — ranging from neuroscience to business metrics — to get you thinking about how you create, measure, and report your performance goals.

perfnow.nl/speakers.htm...

performance.now(); 30th and 31st of October, Amsterdam

On 30th and 31st of October, 2025, the sixth edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.

perfnow.nl

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · 8d

Retail ad campaigns are $$$ — yet campaign landing pages are often the slowest pages on a site.

That slowness has a direct impact on conversions. 💸

I tracked landing pages for 19 leading sites to see who's fast, who's slow, and what's causing their bottlenecks.

www.speedcurve.com/blog/campaig...

SpeedCurve | Are your retail landing pages killing conversions?

How do the campaign landing pages of leading websites compare? Who's fast, who's slow, and what's causing their page speed bottlenecks?

www.speedcurve.com

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Reposted by SpeedCurve

performance.now() conference @perfnow.nl · 8d

Schedule schedule on the wall, who has the best line-up of them all?

perfnow.nl/schedule.html

Screenshot of the performance.now() conference schedule. Follow the link in the main text to read it.

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Harry Roberts @csswizardry.com · 18d

I recently started instrumenting both @cloudflare.social and browser cache hits/misses and the numbers, while obvious, are compelling. The best request is the one that never happens. Check that 0ms TTFB 😍

℅ @speedcurve.com

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SpeedCurve @speedcurve.com · 16d

Zero-second TTFB FTW!

While a fast Time to First Byte doesn't mean your pages will deliver a fast user experience, a slow TTFB almost certainly guarantees your pages will deliver a slow UX.

Learn more 👉👉👉 www.speedcurve.com/web-performa...

Harry Roberts @csswizardry.com · 18d

I recently started instrumenting both @cloudflare.social and browser cache hits/misses and the numbers, while obvious, are compelling. The best request is the one that never happens. Check that 0ms TTFB 😍

℅ @speedcurve.com

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SpeedCurve @speedcurve.com · 21d

🔥 Quick page speed tip! Use critical CSS for faster rendering.

Users will abandon a page if it seems empty and inactive for more than 3 seconds. If they see content rendering or the skeleton of a page loading, you'll buy more time and patience.

👉 Read the guide: www.speedcurve.com/web-performa...

Using Critical CSS for Faster Rendering | SpeedCurve

Using these CSS optimization techniques, you can take control of the browser's rendering process and craft a loading experience that will keep people happier and more engaged.

www.speedcurve.com

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SpeedCurve @speedcurve.com · 22d

Ever wonder why you get DIFFERENT NUMBERS for the SAME METRICS using different #webperf tools?

🕒 Synthetic vs synthetic?
🕕 Synthetic vs RUM?
🕘 RUM vs CruX?

Here are some of the most common reasons. (The most important thing? Track changes within a single tool!)

www.speedcurve.com/web-performa...

How to Trust Your Web Performance Metrics | SpeedCurve

Have you ever wondered why you get different numbers for the same metrics using different tools? Here are some of the most common reasons.

www.speedcurve.com

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Reposted by SpeedCurve

performance.now() conference @perfnow.nl · 23d

performance.now() is coming!

@tammyeverts.com asks a seemingly-simple question: How Fast Is Fast Enough? She'll touch on questions — ranging from neuroscience to business metrics — to get you thinking about how you create, measure, and report your performance goals.

perfnow.nl/speakers.htm...

performance.now(); 30th and 31st of October, Amsterdam

On 30th and 31st of October, 2025, the sixth edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.

perfnow.nl

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Reposted by SpeedCurve

Sia Karamalegos @sia.codes · Aug 18

Need help with web performance optimization? Have a tricky new build you're working on?

I have two projects wrapping up and am available for new ones starting next week.

sia.codes/services/

Services

Failing your Core Web Vitals? Losing conversions due to poor user experience from slow loading, delayed interactions, or shifting content? I’m here to help.

sia.codes

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Reposted by SpeedCurve

Harry Roberts @csswizardry.com · Sep 2

🩺 You don’t *have* to use Obs.js to adapt your site. You can use it as an analytics add-on and send data off to @speedcurve.com! csswizardry.com/Obs.js/demo/...

Obs.js – context-aware web performance for everyone

Obs.js reads device and network signals and allows you to build adaptive user experiences.

csswizardry.com

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · Sep 2

One of the fun things about taking holiday time is sitting back at my desk, looking at my monitor, and asking myself "What is it I do again?"

If this sounds like you — and you care about site speed and UX — here's a quick refresher!

👉 👉 Web Performance Guide: www.speedcurve.com/web-performa...

Friendly-looking humanoid alien – we call him Herman – sitting on a park bench, using the internet on his laptop.

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · Aug 19

So many great articles in this guide — all written by actual humans!

(Shout-out to @andydavies.me, @cliffcrocker.bsky.social, @tkadlec.bsky.social, Joseph Wynn, @markzeman.com, and Steve Souders!)

SpeedCurve @speedcurve.com · Aug 19

New to the world of web performance? Welcome! Here's everything you need to know to master website monitoring, analytics, and diagnostics. Learn how to deliver a fast, joyous experience to all your users.

www.speedcurve.com/web-performa...

#webperf #pagespeed #sitespeed #ux #corewebvitals

Cartoon-style illustration of a friendly, six-eyed humanoid alien sitting on a park bench while using a laptop.

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SpeedCurve @speedcurve.com · Aug 19

New to the world of web performance? Welcome! Here's everything you need to know to master website monitoring, analytics, and diagnostics. Learn how to deliver a fast, joyous experience to all your users.

www.speedcurve.com/web-performa...

#webperf #pagespeed #sitespeed #ux #corewebvitals

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · Aug 19

"Synthetic, RUM, and CrUX data each have their place. It's important to keep in mind the limitations of each monitoring tool and what they're best used for so we don’t make the mistake of overlooking valuable insights."

Excellent explainer from @markzeman.com: www.speedcurve.com/blog/crux-ru...

SpeedCurve | When to use CrUX, RUM, and Synthetic web performance monitoring

Know the strengths and limitations of each tool so you don’t miss out on valuable insights.

www.speedcurve.com

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Harry Roberts @csswizardry.com · Aug 19

I used this to build a quick obfuscator. This will be great for anonymising @speedcurve.com dashboards before putting them in talks etc. Peep the address bar and tab name, too!

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · Aug 18

In today’s edition of “Guess That Unresponsive App”…

Guess this app that would’ve been really helpful — and potentially lifesaving — to access when my family and I were hiking in the mountains yesterday… but which didn’t work because we were on 3G.

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Reposted by SpeedCurve

Mark Zeman @markzeman.com · Jul 16

Loving the shift away from bloated client-side JavaScript. With RUM tools offering better visibility into the impact of JS, the DX vs. UX trade-off is becoming harder to ignore. Any UX focused changes in your stack making it to production? Did your numbers improve? www.speedcurve.com/blog/long-an...

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Reposted by SpeedCurve

Tammy Everts 🍁 @tammyeverts.com · Aug 13

Coming up in less than an hour – at 10am PDT / 1pm EDT!

Henri and I will be chatting about page speed and UX, including the all-important question: How fast is fast enough?

Henri Helvetica 🧑🏾‍🚀🇭🇹 @henrihelvetica.bsky.social · Aug 12

✨ SPDY STREAM 007 ✨
@tammyeverts.com of @speedcurve.com has seen and helped shaped so much in performance. She's an author, conference fave and co-chair for the @perfnow.nl conference. Tammy will share insights you'll want to tune into. Join us!
📆 Wed Aug 13th
⏰ 1PM EDT
🔗 bit.ly/spdy-stream-007

✨ SPDY STREAM 007 ✨ w/ Tammy Everts

With decades working on the web, from performance practices to UX and even commerce, Tammy Everts has seen and helped shaped so much in performance. She's an author, conference stage centrepiece as we...

bit.ly

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Reposted by SpeedCurve

Henri Helvetica 🧑🏾‍🚀🇭🇹 @henrihelvetica.bsky.social · Aug 12

✨ SPDY STREAM 007 ✨
@tammyeverts.com of @speedcurve.com has seen and helped shaped so much in performance. She's an author, conference fave and co-chair for the @perfnow.nl conference. Tammy will share insights you'll want to tune into. Join us!
📆 Wed Aug 13th
⏰ 1PM EDT
🔗 bit.ly/spdy-stream-007

✨ SPDY STREAM 007 ✨ w/ Tammy Everts

With decades working on the web, from performance practices to UX and even commerce, Tammy Everts has seen and helped shaped so much in performance. She's an author, conference stage centrepiece as we...

bit.ly

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Reposted by SpeedCurve

Harry Roberts @csswizardry.com · Aug 6

Same code, same infrastructure, different context. Web performance is sometimes an ‘us thing’ and sometimes a ‘them thing’. For better or worse, we have a responsibility to cater to both.

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Tammy Everts 🍁 @tammyeverts.com · Aug 1

Holy moly... our Speed Matters newsletter has gained 1K new subscribers in the past month! The summer edition goes out next week. It's not too late to sign up and join our 18K subscribers!

Browse the archive and sign up here: www.speedcurve.com/newsletter/

(We won't spam you, I promise.)

SpeedCurve | Speed Matters Newsletter

Get great performance content – no filler! – delivered to your inbox every month.

www.speedcurve.com

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