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@mattzeunert.com.bsky.social

Working on web performance optimization, founder of @debugbear.com

320 Followers  |  163 Following  |  13 Posts  |  Joined: 10.11.2024  |  1.6645

Latest posts by mattzeunert.com on Bluesky

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Many Servers Don't Properly Support HTTP Prioritization | DebugBear Loading the most important resources first is key to improving website performance. However, even when resources are correctly prioritized, servers don't always adhere to the request priorities…

Sometimes servers don't send HTTP response data in the right order.

Our new article explains why request priority matters for HTTP/2 and HTTP/3 connections, and how poor server-side support can impact page speed.

www.debugbear.com/blog/http-pr...

29.07.2025 14:55 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Thank you so much, Alex! Glad you enjoyed them!

13.07.2025 14:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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How To Use The Browser Console: An In-Depth Guide | DebugBear The Console tab in Chrome DevTools is extremely feature-packed! Learn how to get started and explore its more advanced features.

I thought the browser console was simple... I was wrong 🀯

It's actually packed with hidden features:

πŸ–ΌοΈ Logging images
✨ AI explanations
πŸ₯Ή Logging tables
πŸ”§ Console utilities ($0, $_, ...)
πŸ”Ž Advanced filters
πŸ”₯ Live expressions

New article below!

www.debugbear.com/blog/chrome-...

12.06.2025 08:54 β€” πŸ‘ 7    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
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Why can I still load a website that's blocked on my computer? | DebugBear How Google performance optimizations make it possible to access websites without connecting to the website server.

πŸ€” Page speed optimizations in Google search results mean that some page content can be loaded without ever connecting to the website server!

Just published this article explaining how it's possible to view content even for a website blocked in /etc/hosts!

www.debugbear.com/blog/google-...

28.05.2025 08:51 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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A Guide to Performance Optimization with Next.js | DebugBear Find out why performance matters for your website, what common Next.js performance issues are, and what you can do to fix them.

Wrote up an article over at @debugbear.com, just published today! It's a pretty light (yet still dense πŸ˜…) introduction to optimizing performance with Next.js and keeping an eye out for some of the "gotchas" of using the framework.

www.debugbear.com/blog/nextjs-...

10.03.2025 10:02 β€” πŸ‘ 10    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
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CSS Weekly Issue #605 Find out how to optimize the Critical Rendering Path, how to create cool-looking CSS effects, how to work with favicons and animated images in 2025, and more.

CSS Weekly #605
πŸš€ Optimizing The Critical Rendering Path
πŸ˜Άβ€πŸŒ«οΈ Focus by Negation Effect
πŸ”Ž Dynamic Focus Zoom Effect
πŸŒ„ Favicon & Gif in 2025

Featuring @mattzeunert.com, @kevinpowell.co, @en.sitnik.ru, @ryantrimble.com, @geoffreygraham.bsky.social, @tahazsh.bsky.social, @jhey.dev.

cssw.io/issue-605

14.02.2025 14:08 β€” πŸ‘ 17    πŸ” 3    πŸ’¬ 1    πŸ“Œ 0

Thanks for doing more research on this!

Yeah agree, partially displayed LCP is usually enough for user experience. Confusing for people when their website gets poor scores for animations or progressive JPEGs.

07.02.2025 17:24 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Is this the world's WEIRDEST Largest Contentful Paint element?
YouTube video by DebugBear Is this the world's WEIRDEST Largest Contentful Paint element?

Made a video investigating a truly niche LCP regression!

Learn about how LCP is defined, discover bizarre edge cases in contentfulness, and see how to check for changes in metric definitions.

youtu.be/aX7VRto8gVE

04.02.2025 13:45 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
PageSpeed Insights vs. Lighthouse: understanding the Performance score
YouTube video by DebugBear PageSpeed Insights vs. Lighthouse: understanding the Performance score

When talking to customers about their page speed metrics, one of the most common issues is that their PageSpeed Insights scores don't match what they see in DebugBear.

Here's a new video with a detailed explanation!

www.youtube.com/watch?v=t_UG...

30.01.2025 11:52 β€” πŸ‘ 6    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
Web Performance Audit: Early Hints, Hydration State, and a Lazy Loaded LCP Image
YouTube video by DebugBear Web Performance Audit: Early Hints, Hydration State, and a Lazy Loaded LCP Image

Learned about the Ripple Delete feature in ScreenFlow today. Makes life so much easier.

New video: www.youtube.com/watch?v=gnol...

27.01.2025 21:43 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Avoid Large Layout Shifts: 3 Practical Examples | DebugBear Want to fix CLS issues on your website? Here's a step by step guide of how to debug three common causes of large layout shifts on your website.

Not sure how to fix Cumulative Layout Shift issues on your website?

This guide shows three concrete examples of how to identify the cause of CLS and apply a solution.

23.01.2025 15:55 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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TTFB Test: Check Time to First Byte On Your Website Measure Time to First Byte performance from multiple global test locations.

We just published a new free tool: test your website's Time to First Byte metric across 10 global test locations!

πŸš€ Check server response time
πŸ’» View CDN cache status
🌎 See what region the response was served from

20.01.2025 11:42 β€” πŸ‘ 5    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
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You Might Not Have A Web Performance Problem | DebugBear Should you optimize your website performance? Maybe you shouldn't, even if you get a poor Performance score on PageSpeed Insights.

Here's a new article explaining why a poor PageSpeed Insights Performance score is often ok and how you can really tell if performance is a problem for you.

www.debugbear.com/blog/poor-pe...

15.01.2025 08:24 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I was talking to a user yesterday who thought web performance was impacting his SEO.

But it turned out that the performance of his website was fine.

Why was he concerned anyway? PageSpeed Insights gave him a poor Performance score in the diagnostic section.

15.01.2025 08:24 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I'd love to have some kind of senior ops unicorn working at DebugBear.

Someone who can handle B2B sales convos, knows a bit about page speed, can write onboarding emails, create a home working policy, do some customer success...

Anyone have advice on how to find that person?

10.12.2024 12:52 β€” πŸ‘ 2    πŸ” 2    πŸ’¬ 1    πŸ“Œ 0

Is the GTM analyzer one yours?

17.11.2024 09:30 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Love people at #perfnow sharing performance tools they wish existed.

Great ideas for free @debugbear.com tools we could build!

15.11.2024 11:41 β€” πŸ‘ 13    πŸ” 1    πŸ’¬ 3    πŸ“Œ 0
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How To Annotate A Chrome DevTools Performance Trace | DebugBear Learn how to add annotations to Chrome DevTools performance recordings to document your findings and discuss them with your team.

Been taking a look at the new annotations features in the Chrome DevTools performance tab www.debugbear.com/blog/chrome-...

10.11.2024 10:07 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

@mattzeunert.com is following 20 prominent accounts