SpeedCurve is now part of Embrace! Since 2013, we've helped companies of all kinds – from Amazon to Zillow – monitor and improve their site speed and UX.
Joined November 2010
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306 Photos and videos
Pinned Tweet
29 Apr 2025
👋 Come say hi!
🦋 bsky.app/profile/speedcurve.…
🦣 webperf.social/@SpeedCurve
🖇️ linkedin.com/company/speedcu…
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12 Nov 2025
SpeedCurve has been acquired by @embracemobile! We’re combining forces to connect performance, reliability, and user experience across web and mobile apps.
Our founder @MarkZeman shares how our 12-year journey led us here: speedcurve.com/blog/performa…
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SpeedCurve retweeted
19 Sep 2025
Oh my, I love you, @SpeedCurve ❤️
ALT A very rich SpeedCurve dashboard showing a comparison of performance characteristics between HTTP/2 and HTTP/3 visits to my site.
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SpeedCurve retweeted
1 Aug 2025
Set a client up with @SpeedCurve and we’re custom-capturing some more high-fidelity Network and Device information. When people say ‘You users could be in the middle of a field!’, most of theirs actually are.
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SpeedCurve retweeted
29 Jul 2025
A must-read on web performance & conversion rates from the @SpeedCurve team:
🧊 The longer the page froze, the more conversions tanked.
📉 At 4s , it plateaued - most users likely closed the tab entirely.
Speed isn’t just UX, it can make or break business.
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SpeedCurve retweeted
22 May 2025
SpeedCurve | Downtime vs slowtime: Which costs you more? buff.ly/jzCPAY7
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SpeedCurve retweeted
22 May 2025
I’m toying around with @SpeedCurve’s Compare feature. @csswizardry.com readers who are served faster pages are far more likely to paginate to a new article and far less likely to bounce.
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SpeedCurve retweeted
1 May 2025
The gulf between localhost, synthetic testing, and real users is pretty hard to reconcile. But, @__treo for Core Web Vitals only (real users), and @SpeedCurve for everything (synthetic and real users). Also, this deck might help: speakerdeck.com/csswizardry/…
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11 Apr 2025
The User Happiness score aggregates a number of key #webperf and #ux metrics to give you an at-a-glance understanding of how many "happy" versus "unhappy" page views your site delivered.
Here's how it's calculated: support.speedcurve.com/docs/…
11 Apr 2025
Real User Monitoring (RUM) is a game changer when understanding how real people experience your website.
This screenshot from @SpeedCurve shows just how valuable RUM can be — it highlights real-time metrics like:
✅ Largest Contentful Paint
✅ Interaction to Next Paint
✅ Cumulative Layout Shift
…and how they directly impact user happiness.
Notice that only 43% of users were truly happy with the performance. There’s a huge opportunity for improvement, potentially boosting conversion rates and user retention.
Tools like SpeedCurve help us go beyond lab data and dive into what’s happening in the wild.
Better performance = better UX = better business
Let me know if you're using RUM in your performance workflow?
#WebPerformance #UX #SpeedCurve #RUM #UserExperience #Frontend #CoreWebVitals #ConversionRateOptimization
ALT Screenshot of the SpeedCurve RUM (Real User Monitoring) tool showing real-time web performance metrics. At the top, a “User Happiness” indicator is divided into three colors: green for “Happy” (43%), yellow for “Okay” (44%), and red for “Unhappy” (13%). Below are three line charts with key performance metrics: 1. Largest Contentful Paint (LCP): Average of 3.03 seconds, with varying peaks between 5:10 pm and 5:35 pm. 2. Interaction to Next Paint (INP): Average of 324 milliseconds, with fluctuations shown in red and orange throughout the same time period. 3. Cumulative Layout Shift (CLS): Constant value of 0, with green charts showing intermittent spikes but no final accumulation. Each chart includes a trend line overlaid on vertical bars representing the distribution over time.
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SpeedCurve retweeted
3 Mar 2025
SpeedCurve | Six things that slow down your site's UX (and why you have no control over them) ift.tt/EAcVNQn
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SpeedCurve retweeted
7 Nov 2024
🚀 Proud to be pushing the limits of web speed and performance! According to SpeedCurve industry benchmarks, t-online.de is now the fastest-rendering major news page in Germany. 🌐 #WebPerformance #Frontend @tonline @SpeedCurve
app.speedcurve.com/benchmark…
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SpeedCurve retweeted
31 Oct 2024
The next edition of the Performance Matters newsletter is queued up for delivery next week, and it is PACKED with #webperf and #UX goodness!
It's not too late to sign up and join our 15,500 subscribers. (I promise we will not spam you!)
speedcurve.com/newsletter/
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SpeedCurve retweeted
30 Oct 2024
If the holiday season has crept up on you, fear not! There's still a lot you can do to keep your site fast – and your users happy – through the holidays and beyond. @cliffcrocker shares 10 things you can do before your holiday code freeze.
speedcurve.com/blog/2024-hol… #webperf #UX
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SpeedCurve retweeted
24 Oct 2024
I talk with a LOT of companies. What do the fastest sites have in common? They use performance budgets to prevent regressions and deliver a consistently fast #UX.
What's a #webperf budget? This guide covers everything you need to know to get started.
speedcurve.com/web-performan…
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23 Oct 2024
It's not enough to focus on Core Web Vitals numbers. You need to drill down & find the root causes of poor #webperf & #UX.
🟦 Identify problem pages
🟨 Pinpoint problem page elements
🟩 Get full diagnostics so you know HOW to fix issues
speedcurve.com/blog/new-core… #corewebvitals
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SpeedCurve retweeted
22 Oct 2024
Is TTFB a hot new metric? No.
Is it a key #webperf metric for tracking responsiveness? YES! Slow TTFB virtually guarantees your site will deliver a poor #UX. Bonus: It's widely available across browsers!
@tkadlec explains how to diagnose TTFB issues...
speedcurve.com/web-performan…
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16 Oct 2024
NEW: Our latest release includes a huge upgrade for your Vitals dashboard!
😀 Backend Time & FCP added to Vitals
😀 More charts & visuals to help you quickly find & fix issues that affect Vitals
😀 Consistent filters across ALL dashboards
speedcurve.com/blog/new-core… #webperf #ux
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SpeedCurve retweeted
3 Oct 2024
If you're planning to attend @SmashingConf NY next week, this is an amazing chance to learn from one of my all-time favourite #webperf people, @tkadlec. Spaces are limited, so register for this lunch session ASAP!
3 Oct 2024
Hello #SmashingConf NY folks! Be sure to sign up for this FREE lunch session with Tim Kadlec (@tkadlec).
Tim will give a tour of new #webperf metrics how to use them to home in on which optimizations will make your pages faster (and which ones won't).
smashingconf.com/ny-2024/lun…
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3 Oct 2024
Hello #SmashingConf NY folks! Be sure to sign up for this FREE lunch session with Tim Kadlec (@tkadlec).
Tim will give a tour of new #webperf metrics how to use them to home in on which optimizations will make your pages faster (and which ones won't).
smashingconf.com/ny-2024/lun…
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