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debugbear.com
DebugBear
@debugbear.com
280 followers 25 following 240 posts
Learn about page speed, measure your website performance, and monitor Core Web Vitals metrics over time.

https://www.debugbear.com/
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debugbear.com
We've spent a lot of time investing in our product this year!

Catch up on the biggest improvements across real user monitoring, synthetic data, and team collaboration.

www.debugbear.com/blog/debugbe...
How We Made DebugBear Better In 2025 | DebugBear
Learn how we've improved real user monitoring, synthetic testing, and team collaboration.
www.debugbear.com
December 18, 2025 at 3:55 PM
debugbear.com
Lazy loading out-of-viewport images can make the main content on your website load faster.

⬇️ Learn how in this video.

www.youtube.com/watch?v=CPJf...
How to defer offscreen images
Learn how to make your website load faster by lazy loading out-of-viewport images. 00:00 Page speed impact of offscreen images 01:18 Lazy load offscreen images in DebugBear 01:37 Result of the…
www.youtube.com
December 16, 2025 at 1:12 PM
debugbear.com
You can now measure LCP and INP scores in both Safari and Firefox!

www.debugbear.com/blog/firefox...
Firefox And Safari Now Support Two Core Web Vitals Metrics | DebugBear
Firefox and Safari now support LCP and INP Core Web Vitals metrics, providing new insight into real visitor experience.
www.debugbear.com
December 15, 2025 at 3:55 PM
debugbear.com
Slow interactions aren't always caused by specific UI elements, but can also be caused by global tracking scripts.

Our new article discusses this and other findings on a real world website: www.debugbear.com/blog/splunk-...
December 12, 2025 at 3:55 PM
debugbear.com
We published a new video on the network throttling feature in Chrome DevTools.

It might not work the way you'd expect! 😮

www.youtube.com/watch?v=93HI...
How Does Chrome DevTools Network Throttling Actually Work?
Learn what Chrome network throttling looks like behind the scenes and how it compares to system-level throttling with tools like Apple's Network Link Conditioner. Try our free website speed test:…
www.youtube.com
December 11, 2025 at 3:55 PM
debugbear.com
Configuring browser caching correctly results in much faster page load times for repeat visits.

Our article on the cache-control HTTP header explains how to set it up: www.debugbear.com/docs/http-ca...
December 9, 2025 at 3:55 PM
debugbear.com
🎥 New video: learn how to use real user monitoring data to debug Interaction to Next Paint scores!

www.youtube.com/watch?v=kpPE...
How To Improve Interaction to Next Paint with Real User Monitoring
In this video, we take a look at how to improve Interaction to Next Paint by using Real User Monitoring data. Sign up for a free 14 day trial: http://www.debugbear.com/signup 0:00 - Intro 0:17 - Why…
www.youtube.com
December 8, 2025 at 3:55 PM
debugbear.com
Did you know that Firefox now supports the Interaction to Next Paint metric? And that Safari is working on adding support?

Learn about this and other developments in our year-in-review post for 2025! www.debugbear.com/blog/2025-in...
2025 In Review: What’s New In Web Performance? | DebugBear
Find out how web performance changed in 2025, and what changes are coming up in the future.
www.debugbear.com
December 5, 2025 at 3:55 PM
Reposted by DebugBear
mattzeunert.com
Added a new request stats view to the DebugBear page speed test result!

Try it for free here www.debugbear.com/test/website...
December 3, 2025 at 10:10 AM
debugbear.com
What's causing large HTML download size? It's often images, fonts, and data embedded within the code!

calendar.perfplanet.com/2025/explori...
Exploring Large HTML Documents On The Web
Most HTML documents are relatively small, providing a starting point for other resources on the page to load. But why do some websites load several megabytes of HTML code? Usually it's not that…
calendar.perfplanet.com
December 2, 2025 at 6:15 PM
debugbear.com
New video: learn how to debug slow page load time and investigate regressions using real user data.

www.youtube.com/watch?v=Wlyq...
How To Fix Largest Contentful Paint with Real User Monitoring
In this video, we take a look at how to improve Largest Contentful Paint by using Real User Monitoring data. Sign up for a free 14 day trial: http://www.debugbear.com/signup 0:00 - Intro 0:10 -…
www.youtube.com
November 28, 2025 at 1:15 PM
debugbear.com
Product updates for November:

💰 Measure conversion rates in RUM
📕 Improved HTML Size Analyzer
🐌 Track synthetic INP scores
✅ Free website SEO checker

www.debugbear.com/changelog/no...
November 2025 Release Notes | DebugBear
We've been working on making it easier to measure the business impact of performance, and analyze your synthetic test results.
www.debugbear.com
November 27, 2025 at 3:00 PM
debugbear.com
Did you accidentally include large images in your JSON code?

Our JSON size analyzer highlights any embedded images in addition to providing a property-based size breakdown.

www.debugbear.com/json-size-an...
November 27, 2025 at 9:45 AM
debugbear.com
What's causing the Calendly booking page to load slowly sometimes?

We've investigate in our latest blog post: www.debugbear.com/blog/calendl...
November 26, 2025 at 3:55 PM
debugbear.com
Want to get the most out of DebugBear synthetic testing?

This recent presentation at the PerformanceObserver meetup explains how to interpret the DebugBear test results and waterfall view.

performanceobserver.dev/talks/synthe...
Synthetic Web Performance Testing With DebugBear | PerformanceObserver
Lab-based web performance tools can provide in-depth reporting on what’s slowing down your website. Learn how to use the DebugBear website speed test to uncover web performance issues, and how…
performanceobserver.dev
November 25, 2025 at 3:55 PM
debugbear.com
How can real user data help you debug content shifts experienced by your visitors?

Our new video explains how to debug poor CLS scores step by step using RUM data.

www.youtube.com/watch?v=sMCJ...
How To Fix Cumulative Layout Shift with Real User Monitoring
In this video, we take a look at how to identify poor CLS experiences by using Real User Monitoring data.Sign up for a free 14 day trial: http://www.debugbear.com/signup 0:00 - Intro 0:18 -…
www.youtube.com
November 21, 2025 at 3:55 PM
Reposted by DebugBear
henrihelvetica.bsky.social
✨ SPDY STREAM 018 ✨ TODAY, we have @mattzeunert.com from @debugbear.com ! He recently penned an piece for @smashingmagazine.com about the importance of metric monitoring + effectively collecting #CoreWebVitals. We're chatting live later today
📆 TODAY!
⏰ 1pm EST, 7pm CET
🔗 youtube.com/live/VfPX9G5...
SPDY stream. Performance people and projects Thursday, November 20 1 PM Eastern standard time online. Image of two avatars. One with a British flag the other way it Canadian flag. Image of a electric racing car.
November 20, 2025 at 4:07 PM
debugbear.com
Our free HTML size analyzer can tell you what's taking up space in your HTML!

Identify embedded images, fonts, or JavaScript hydration state.

www.debugbear.com/html-size-an...
November 20, 2025 at 12:30 PM
debugbear.com
Small improvement to our request waterfall: view the request count and page weight for your selected requests.

For example, you can quickly see how many CSS files your website is loading, or how much data transfer is due to PNG files.
November 19, 2025 at 3:55 PM
Reposted by DebugBear
smashingmagazine.com
There are many tips for improving your website's performance. But even if you follow all the advice, can you maintain an optimized site? And are you targeting the right pages?

↬ Matt Zeunert on effective strategies: www.smashingmagazine.com/2025/11/effe...

(Article supported by @debugbear.com 💖)
November 18, 2025 at 7:00 PM
debugbear.com
You can now measure INP scores as part of DebugBear user flows and track how your scores change over time.
November 18, 2025 at 3:55 PM
debugbear.com
DebugBear real user monitoring now shows a Cumulative Layout Shift (CLS) visualization for each page view with a layout shift.
November 17, 2025 at 3:55 PM
debugbear.com
WebPageTest is a great tool for web performance debugging.

Learn how to use it to test your website and identify optimizations based on the request waterfall.

www.youtube.com/watch?v=vdpq...
How to analyze website performance with WebPageTest
Learn how to check your website speed with the free WebPageTest tool https://www.catchpoint.com/webpagetest Or try the DebugBear speed test as an alternative…
www.youtube.com
November 14, 2025 at 3:55 PM
debugbear.com
Need help with a tricky web performance issue, or not sure where to start?

We've got a list of recommended consultants and agencies you can work with!

www.debugbear.com/web-performa...
November 13, 2025 at 3:55 PM
debugbear.com
Did you know Google's CrUX dataset includes breakdown data for the Largest Contentful Paint metric?

You can find it in the Web Vitals tab of the free DebugBear page speed test www.debugbear.com/test/website...
November 13, 2025 at 12:30 PM