Tim Kadlec
@tkadlec
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Principal Product Manager @Cloudflare—focused on perf & observability. Co-chair of @perfnowconf. Taller than my photo looks.
Northwoods, WI
Joined February 2008
Is “fast” fast enough? 🚀 @tkadlec explores why today’s performance benchmarks won’t cut it tomorrow at #WebExpo. Learn how new web standards push performance and how to stay ahead TODAY. Don't fall behind and join us in Prague, May 28–30! https://t.co/AdIjiFw62P
webexpo.net
May 27-29, 2026
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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... https://t.co/8ekiAS219z
speedcurve.com
Tim Kadlec shows how to quickly diagnose TTFB issues by looking at its supporting metrics, AKA subparts.
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Exciting new product updates from our awesome dev team! Long story short: We've made it easier and faster for you to find and fix the issues that are hurting your Vitals metrics! #webperf #corewebvitals #ux
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 https://t.co/gN5xRvdAuc
#webperf #ux
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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). https://t.co/yDQBcTeXCG
smashingconf.com
Interested in getting even more out of your Smashing experience? Our amazing friends from The Interledger Foundation, SpeedCurve, Deque Systems and Storyblok are hosting a session to let you know...
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Err...this is gonna sound crazy, but I'm pretty sure AWS is...randomly deleting dynamoDB items? My app has one & only one point where it deletes items and I can see no record in CloudTrail of anything being deleted, yet every day a couple random items just...aren't there anymore
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me anytime I try to figure out how to accomplish anything in the AWS UI
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ok hold up how long has this been there without me noticing chrome drawing a red line between style recalc and the method that triggered it in their flame charts
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NEW: Our latest release includes RUM attribution and subparts for INP! @cliffcrocker explains: 🟡 Element attribution 🟢 Where time is spent within INP, leveraging subparts 🔴 How to use this information to fix INP issues https://t.co/EWAXiNIZ30
#corewebvitals #webperf #ux
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Keeping your site fast is a crucial endless game. Yet it's perilously easy to lose focus. @tkadlec uses the analogy of guardrails (automated testing & alerts) and breadcrumbs (deployment tracking) to make #webperf more visible throughout the dev process. https://t.co/fF1dtEByCd
speedcurve.com
Performance isn’t something you fix once and walk away from. Continuous monitoring - using performance budgets in your CI/CD workflow - helps you fight regressions and stay fast.
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NEW! Based on your feedback, we've expanded your capabilities for on-demand testing! This how-to post covers: 🟡 Scheduled vs on-demand tests 🟡 Run on-demand tests for site or custom URL 🟡 View & compare test details 🟡 Group tests as a deploy https://t.co/mjHwppqaIc
#webperf
speedcurve.com
Based on your feedback, we've just launched new capabilities for on-demand testing. We're pretty excited, and we hope you are, too!
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Site speed isn’t something you fix once and walk away from. @tkadlec offers pro tips on how to set up continuous monitoring – as part of your CI/CD process – so you can fight regressions and stay fast. https://t.co/Rjsf3aGTxQ
#webperf #sitespeed #pagespeed #cicd
speedcurve.com
Performance isn’t something you fix once and walk away from. Continuous monitoring - using performance budgets in your CI/CD workflow - helps you fight regressions and stay fast.
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Kind of snuck under the radar, but love that @speedcurve has navigation types as a filter now. Extremely useful!!
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Love me some server timing!
Backend time can have a big impact on Largest Contentful Paint and other metrics. @cliffcrocker explains how to use server-timing headers to find out what's happening inside the black box of Time to First Byte. https://t.co/jZLdjguOTL
#webperf #pagespeed #corewebvitals
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ICYMI: Our awesome customer care team just got awesomer! Welcome @tkadlec! 😀 Learn more about Tim and how he'll be helping us make your sites faster (and your users happier): https://t.co/u6xeTWKx87 ⚡️ Explore our #webperf and #ux consulting services: https://t.co/RElhQgBaqy
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@SpeedCurve I am still going to do some consulting this year, but I'm taking on fewer clients (for obvious reasons :) ). I do still have some availability left:
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Super excited to be joining the @SpeedCurve team and working alongside folks I've called friends for a long time!
Welcome to the team, @tkadlec! 2024 is off to a fantastic start! In his first post on our blog, Tim talks about his #webperf path... and how joining SpeedCurve was a long time coming. (We agree!) https://t.co/u6xeTWL4XF
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In case you did not know yet. We have a #scholarship program for #btconf. We always have a certain amount of #tickets, we give out to support anyone who otherwise could not join evens like ours. If you want to apply for one, please use this link:
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Line-up for the 4th #PerfNow: @TheNishuGoel, @csswizardry, Bas Schouten, @jodiewyc, @RyanTownsend, @tameverts, @TimVereecke, @programmingart, @KeerthanaK17, @tkadlec, @guaca, @MarkZeman, @szynszyliszys, @TheRealNooshu, Sia Karamalegos & @philhawksworth
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