DebugBear
@debugbear.com
Learn about page speed, measure your website performance, and monitor Core Web Vitals metrics over time.
https://www.debugbear.com/
https://www.debugbear.com/
How do Content Delivery Networks work, and how can they speed up your website?
Our new video explains how CDN infrastructure can improve website performance by reducing latency, caching content, and more.
www.youtube.com/watch?v=7pYE...
Our new video explains how CDN infrastructure can improve website performance by reducing latency, caching content, and more.
www.youtube.com/watch?v=7pYE...
Content Delivery Networks (CDNs): latency reduction, caching, and more
Learn how Content Delivery Networks work and how they can improve website performance.
Global CDN test: https://www.debugbear.com/test/ttfb?utm_campaign=yt-cdn
00:00 What is a Content Delivery…
www.youtube.com
January 15, 2026 at 3:55 PM
How do Content Delivery Networks work, and how can they speed up your website?
Our new video explains how CDN infrastructure can improve website performance by reducing latency, caching content, and more.
www.youtube.com/watch?v=7pYE...
Our new video explains how CDN infrastructure can improve website performance by reducing latency, caching content, and more.
www.youtube.com/watch?v=7pYE...
Trying to optimize your React app for performance?
Our new article explains how you can identify slow React code and optimize it.
www.debugbear.com/blog/measuri...
Our new article explains how you can identify slow React code and optimize it.
www.debugbear.com/blog/measuri...
How to Measure and Optimize React Performance | DebugBear
Learn how to measure the performance of your React app and identify what's slowing it down.
www.debugbear.com
January 14, 2026 at 3:55 PM
Trying to optimize your React app for performance?
Our new article explains how you can identify slow React code and optimize it.
www.debugbear.com/blog/measuri...
Our new article explains how you can identify slow React code and optimize it.
www.debugbear.com/blog/measuri...
Did you know that Chrome automatically assigns a Medium priority to the first 5 images on a web page?
By default image requests are low priority. Once the page renders the browser knows what images are currently visible, and the priority is then changed to high.
www.debugbear.com/blog/chrome-...
By default image requests are low priority. Once the page renders the browser knows what images are currently visible, and the priority is then changed to high.
www.debugbear.com/blog/chrome-...
How Does Chrome Prioritize Image Requests? | DebugBear
How does Chrome priority image requests and what techniques are available to better prioritize images on your website.
www.debugbear.com
January 13, 2026 at 3:55 PM
Did you know that Chrome automatically assigns a Medium priority to the first 5 images on a web page?
By default image requests are low priority. Once the page renders the browser knows what images are currently visible, and the priority is then changed to high.
www.debugbear.com/blog/chrome-...
By default image requests are low priority. Once the page renders the browser knows what images are currently visible, and the priority is then changed to high.
www.debugbear.com/blog/chrome-...
Not every network request has the same impact on page load time.
Our new video on the critical rendering path explains how you can identify the most important resource requests.
www.youtube.com/watch?v=Yf4i...
Our new video on the critical rendering path explains how you can identify the most important resource requests.
www.youtube.com/watch?v=Yf4i...
Analyze the critical rendering path with the network dependency tree
Learn how to use the Lighthouse network dependency tree to analyze the critical rendering path on your website.
00:00 What is the critical rendering path?
00:26 How to identify critical…
www.youtube.com
January 12, 2026 at 3:55 PM
Not every network request has the same impact on page load time.
Our new video on the critical rendering path explains how you can identify the most important resource requests.
www.youtube.com/watch?v=Yf4i...
Our new video on the critical rendering path explains how you can identify the most important resource requests.
www.youtube.com/watch?v=Yf4i...
Did you know you can add annotations to your web performance charts on DebugBear?
www.debugbear.com/docs/annotat...
www.debugbear.com/docs/annotat...
January 7, 2026 at 3:38 PM
Did you know you can add annotations to your web performance charts on DebugBear?
www.debugbear.com/docs/annotat...
www.debugbear.com/docs/annotat...
📊 Last month we rolled out some big improvements to our web performance alerts!
www.debugbear.com/changelog/de...
www.debugbear.com/changelog/de...
December 2025 Release Notes | DebugBear
Improved RUM alerting, better synthetic notifications, network request statistics, and session tracking updates.
www.debugbear.com
January 2, 2026 at 6:04 PM
📊 Last month we rolled out some big improvements to our web performance alerts!
www.debugbear.com/changelog/de...
www.debugbear.com/changelog/de...
The fetchpriority attribute might well be the most impactful performance feature that browsers have added in the last few years.
Learn how to use it to make key content on your website load as quickly as possible!
www.youtube.com/watch?v=yoa7...
Learn how to use it to make key content on your website load as quickly as possible!
www.youtube.com/watch?v=yoa7...
Apply fetchpriority=High To Optimize LCP Image Discovery
The HTML fetchPriority attribute helps browsers load more quickly, resulting in better Largest Contentful Paint scores.
00:00 Introduction
00:16 Why do resource priorities matter?
01:17 Why do we…
www.youtube.com
December 29, 2025 at 1:30 PM
The fetchpriority attribute might well be the most impactful performance feature that browsers have added in the last few years.
Learn how to use it to make key content on your website load as quickly as possible!
www.youtube.com/watch?v=yoa7...
Learn how to use it to make key content on your website load as quickly as possible!
www.youtube.com/watch?v=yoa7...
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...
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
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...
Catch up on the biggest improvements across real user monitoring, synthetic data, and team collaboration.
www.debugbear.com/blog/debugbe...
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...
⬇️ 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
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...
⬇️ Learn how in this video.
www.youtube.com/watch?v=CPJf...
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-...
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
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-...
Our new article discusses this and other findings on a real world website: www.debugbear.com/blog/splunk-...
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...
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
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...
It might not work the way you'd expect! 😮
www.youtube.com/watch?v=93HI...
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...
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
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...
Our article on the cache-control HTTP header explains how to set it up: www.debugbear.com/docs/http-ca...
🎥 New video: learn how to use real user monitoring data to debug Interaction to Next Paint scores!
www.youtube.com/watch?v=kpPE...
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
🎥 New video: learn how to use real user monitoring data to debug Interaction to Next Paint scores!
www.youtube.com/watch?v=kpPE...
www.youtube.com/watch?v=kpPE...
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...
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
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...
Learn about this and other developments in our year-in-review post for 2025! www.debugbear.com/blog/2025-in...
Reposted by DebugBear
Added a new request stats view to the DebugBear page speed test result!
Try it for free here www.debugbear.com/test/website...
Try it for free here www.debugbear.com/test/website...
December 3, 2025 at 10:10 AM
Added a new request stats view to the DebugBear page speed test result!
Try it for free here www.debugbear.com/test/website...
Try it for free here www.debugbear.com/test/website...
What's causing large HTML download size? It's often images, fonts, and data embedded within the code!
calendar.perfplanet.com/2025/explori...
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
What's causing large HTML download size? It's often images, fonts, and data embedded within the code!
calendar.perfplanet.com/2025/explori...
calendar.perfplanet.com/2025/explori...
New video: learn how to debug slow page load time and investigate regressions using real user data.
www.youtube.com/watch?v=Wlyq...
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
New video: learn how to debug slow page load time and investigate regressions using real user data.
www.youtube.com/watch?v=Wlyq...
www.youtube.com/watch?v=Wlyq...
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...
💰 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
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...
💰 Measure conversion rates in RUM
📕 Improved HTML Size Analyzer
🐌 Track synthetic INP scores
✅ Free website SEO checker
www.debugbear.com/changelog/no...
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...
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
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...
Our JSON size analyzer highlights any embedded images in addition to providing a property-based size breakdown.
www.debugbear.com/json-size-an...
What's causing the Calendly booking page to load slowly sometimes?
We've investigate in our latest blog post: www.debugbear.com/blog/calendl...
We've investigate in our latest blog post: www.debugbear.com/blog/calendl...
November 26, 2025 at 3:55 PM
What's causing the Calendly booking page to load slowly sometimes?
We've investigate in our latest blog post: www.debugbear.com/blog/calendl...
We've investigate in our latest blog post: www.debugbear.com/blog/calendl...
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...
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
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...
This recent presentation at the PerformanceObserver meetup explains how to interpret the DebugBear test results and waterfall view.
performanceobserver.dev/talks/synthe...
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...
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
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...
Our new video explains how to debug poor CLS scores step by step using RUM data.
www.youtube.com/watch?v=sMCJ...
Reposted by DebugBear
✨ 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...
📆 TODAY!
⏰ 1pm EST, 7pm CET
🔗 youtube.com/live/VfPX9G5...
November 20, 2025 at 4:07 PM
✨ 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...
📆 TODAY!
⏰ 1pm EST, 7pm CET
🔗 youtube.com/live/VfPX9G5...
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...
Identify embedded images, fonts, or JavaScript hydration state.
www.debugbear.com/html-size-an...
November 20, 2025 at 12:30 PM
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...
Identify embedded images, fonts, or JavaScript hydration state.
www.debugbear.com/html-size-an...