@mattzeunert.com
Working on web performance optimization, founder of @debugbear.com
We've started working on a conversion tracking feature for DebugBear! Measure how web performance is impacting visitor behavior and conversion rates.
www.debugbear.com/docs/rum/con...
www.debugbear.com/docs/rum/con...
November 18, 2025 at 10:10 AM
We've started working on a conversion tracking feature for DebugBear! Measure how web performance is impacting visitor behavior and conversion rates.
www.debugbear.com/docs/rum/con...
www.debugbear.com/docs/rum/con...
HTML parsing speed depends a lot on how powerful the device that's visiting the website is.
When I measure parse time on my laptop it takes under 7 milliseconds to process one megabyte of HTML. But on a low-end Android phone it takes 88 milliseconds!
www.debugbear.com/blog/html-pa...
When I measure parse time on my laptop it takes under 7 milliseconds to process one megabyte of HTML. But on a low-end Android phone it takes 88 milliseconds!
www.debugbear.com/blog/html-pa...
November 17, 2025 at 10:10 AM
HTML parsing speed depends a lot on how powerful the device that's visiting the website is.
When I measure parse time on my laptop it takes under 7 milliseconds to process one megabyte of HTML. But on a low-end Android phone it takes 88 milliseconds!
www.debugbear.com/blog/html-pa...
When I measure parse time on my laptop it takes under 7 milliseconds to process one megabyte of HTML. But on a low-end Android phone it takes 88 milliseconds!
www.debugbear.com/blog/html-pa...
The DebugBear request waterfall back when it was still built on top of Highcharts 😂
November 14, 2025 at 10:33 PM
The DebugBear request waterfall back when it was still built on top of Highcharts 😂
Recently a customer was telling me no analytics data was reported for one of their websites.
I used the script below to find the culprit: a script in Google Tag Manager that assigned a different navigation value!
Learn about other JavaScript debugging techniques: www.debugbear.com/blog/chrome-...
I used the script below to find the culprit: a script in Google Tag Manager that assigned a different navigation value!
Learn about other JavaScript debugging techniques: www.debugbear.com/blog/chrome-...
November 14, 2025 at 10:10 AM
Recently a customer was telling me no analytics data was reported for one of their websites.
I used the script below to find the culprit: a script in Google Tag Manager that assigned a different navigation value!
Learn about other JavaScript debugging techniques: www.debugbear.com/blog/chrome-...
I used the script below to find the culprit: a script in Google Tag Manager that assigned a different navigation value!
Learn about other JavaScript debugging techniques: www.debugbear.com/blog/chrome-...
Our JSON Size Analyzer now can now identify images embedded in your JSON code!
Spotted an example yesterday where 42 images were part of the JavaScript hydration state.
Test your JSON here: www.debugbear.com/json-size-an...
Or check HTML and embedded scripts: www.debugbear.com/html-size-an...
Spotted an example yesterday where 42 images were part of the JavaScript hydration state.
Test your JSON here: www.debugbear.com/json-size-an...
Or check HTML and embedded scripts: www.debugbear.com/html-size-an...
November 13, 2025 at 10:10 AM
Our JSON Size Analyzer now can now identify images embedded in your JSON code!
Spotted an example yesterday where 42 images were part of the JavaScript hydration state.
Test your JSON here: www.debugbear.com/json-size-an...
Or check HTML and embedded scripts: www.debugbear.com/html-size-an...
Spotted an example yesterday where 42 images were part of the JavaScript hydration state.
Test your JSON here: www.debugbear.com/json-size-an...
Or check HTML and embedded scripts: www.debugbear.com/html-size-an...
November 10, 2025 at 11:59 AM
Responsive images are a web performance best practice... but embedding all versions as Base64 in the HTML isn't 🙃
Test your own website here: www.debugbear.com/test/website...
Test your own website here: www.debugbear.com/test/website...
November 8, 2025 at 4:40 PM
Responsive images are a web performance best practice... but embedding all versions as Base64 in the HTML isn't 🙃
Test your own website here: www.debugbear.com/test/website...
Test your own website here: www.debugbear.com/test/website...
The biggest factor slowing down the BitBucket homepage: massive CSS selectors!
Test your own CSS files here with our free tool: www.debugbear.com/css-size-ana...
Test your own CSS files here with our free tool: www.debugbear.com/css-size-ana...
November 7, 2025 at 12:57 PM
The biggest factor slowing down the BitBucket homepage: massive CSS selectors!
Test your own CSS files here with our free tool: www.debugbear.com/css-size-ana...
Test your own CSS files here with our free tool: www.debugbear.com/css-size-ana...
⏳ Why would Chrome decide against loading an image even though it can see it in the HTML?
Most browsers have a concept of "tight mode" where the number of non-critical requests is limited in order to give priority to render-blocking resources.
More: www.smashingmagazine.com/2025/01/tigh...
Most browsers have a concept of "tight mode" where the number of non-critical requests is limited in order to give priority to render-blocking resources.
More: www.smashingmagazine.com/2025/01/tigh...
October 20, 2025 at 3:45 PM
⏳ Why would Chrome decide against loading an image even though it can see it in the HTML?
Most browsers have a concept of "tight mode" where the number of non-critical requests is limited in order to give priority to render-blocking resources.
More: www.smashingmagazine.com/2025/01/tigh...
Most browsers have a concept of "tight mode" where the number of non-critical requests is limited in order to give priority to render-blocking resources.
More: www.smashingmagazine.com/2025/01/tigh...
Actual printed detail if it helps! (The dark blue lines on the lighter blue are intentional.)
October 2, 2025 at 7:42 AM
Actual printed detail if it helps! (The dark blue lines on the lighter blue are intentional.)
I am not a calendar or printing expert! But I was happy with the quality. Ordered just a single one at first to check.
October 2, 2025 at 7:38 AM
I am not a calendar or printing expert! But I was happy with the quality. Ordered just a single one at first to check.
Love people at #perfnow sharing performance tools they wish existed.
Great ideas for free @debugbear.com tools we could build!
Great ideas for free @debugbear.com tools we could build!
November 15, 2024 at 11:45 AM
Love people at #perfnow sharing performance tools they wish existed.
Great ideas for free @debugbear.com tools we could build!
Great ideas for free @debugbear.com tools we could build!