Recorded a video explaining how to use WebPageTest and interpret the request waterfall!
www.youtube.com/watch?v=vdpq...
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 12, 2025 at 11:15 AM
Recorded a video explaining how to use WebPageTest and interpret the request waterfall!
www.youtube.com/watch?v=vdpq...
www.youtube.com/watch?v=vdpq...
The latest update for #Catchpoint includes "#Observability 2025 Decoded: What the DZone Report Means for SLO-Driven Ops" and "The next evolution of WebPageTest has arrived, and it's a game-changer".
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
Catchpoint
Catchpoint's Internet Performance Monitoring (IPM) suite offers synthetics, RUM, performance optimization, high fidelity data and flexible visualizations with advanced analytics.
opsmtrs.com
October 31, 2025 at 3:01 AM
The latest update for #Catchpoint includes "#Observability 2025 Decoded: What the DZone Report Means for SLO-Driven Ops" and "The next evolution of WebPageTest has arrived, and it's a game-changer".
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
The latest update for #Catchpoint includes "The next evolution of WebPageTest has arrived, and it's a game-changer" and "The #Monitoring Blind Spot That Could Cost You Black Friday".
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
Catchpoint
Catchpoint's Internet Performance Monitoring (IPM) suite offers synthetics, RUM, performance optimization, high fidelity data and flexible visualizations with advanced analytics.
opsmtrs.com
October 28, 2025 at 3:55 AM
The latest update for #Catchpoint includes "The next evolution of WebPageTest has arrived, and it's a game-changer" and "The #Monitoring Blind Spot That Could Cost You Black Friday".
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
#DigitalWorkplace #DevOps https://opsmtrs.com/3exFJfo
Oh, if I log out of WebPageTest, I can go back to the old interface and actually get some work done. At least until tomorrow when we're all forced to use the new ui.
October 22, 2025 at 10:54 PM
Oh, if I log out of WebPageTest, I can go back to the old interface and actually get some work done. At least until tomorrow when we're all forced to use the new ui.
Are there alternatives? to WebPageTest?
October 22, 2025 at 10:28 PM
Are there alternatives? to WebPageTest?
Tomorrow we lose access to the current version of WebPageTest and will be forced into the new version. I’m dreading the switch. Experiments are a HUGE step backwards and I use them all the time. The interface may be consistent with Catchpoint UI, but it is boring and confusing if all you use is WPT.
October 22, 2025 at 8:46 PM
Tomorrow we lose access to the current version of WebPageTest and will be forced into the new version. I’m dreading the switch. Experiments are a HUGE step backwards and I use them all the time. The interface may be consistent with Catchpoint UI, but it is boring and confusing if all you use is WPT.
Sponsorship renewed again ⚡
Thrilled to share that Catchpoint, the company behind #WebPageTest, keeps sponsoring WebPerformance Report for another year.
Together we promote a culture of performance, turning data into clarity, trust, and results.
👉 webperformancereport.com
#WebPerf
Thrilled to share that Catchpoint, the company behind #WebPageTest, keeps sponsoring WebPerformance Report for another year.
Together we promote a culture of performance, turning data into clarity, trust, and results.
👉 webperformancereport.com
#WebPerf
October 21, 2025 at 7:24 PM
Sponsorship renewed again ⚡
Thrilled to share that Catchpoint, the company behind #WebPageTest, keeps sponsoring WebPerformance Report for another year.
Together we promote a culture of performance, turning data into clarity, trust, and results.
👉 webperformancereport.com
#WebPerf
Thrilled to share that Catchpoint, the company behind #WebPageTest, keeps sponsoring WebPerformance Report for another year.
Together we promote a culture of performance, turning data into clarity, trust, and results.
👉 webperformancereport.com
#WebPerf
🚀 Exciting update from WebPerformance Report!
Every WebPageTest report now includes an AI Insight✨, a concise executive summary built with #Gemini by Google.
Our mission: make web performance data understandable and actionable for everyone.
Try it yourself 👉 webperformancereport.com
#webperf #AI
Every WebPageTest report now includes an AI Insight✨, a concise executive summary built with #Gemini by Google.
Our mission: make web performance data understandable and actionable for everyone.
Try it yourself 👉 webperformancereport.com
#webperf #AI
October 5, 2025 at 7:22 PM
🚀 Exciting update from WebPerformance Report!
Every WebPageTest report now includes an AI Insight✨, a concise executive summary built with #Gemini by Google.
Our mission: make web performance data understandable and actionable for everyone.
Try it yourself 👉 webperformancereport.com
#webperf #AI
Every WebPageTest report now includes an AI Insight✨, a concise executive summary built with #Gemini by Google.
Our mission: make web performance data understandable and actionable for everyone.
Try it yourself 👉 webperformancereport.com
#webperf #AI
Did you know that how the network is throttled when running a page speed test impacts metrics?
🛠️ DevTools throttling is a simple minimum request duration
🏡 Lighthouse only simulates a slow-down
🐻 DebugBear & WebPageTest introduce a packet-level delay
Learn more: www.debugbear.com/blog/network...
🛠️ DevTools throttling is a simple minimum request duration
🏡 Lighthouse only simulates a slow-down
🐻 DebugBear & WebPageTest introduce a packet-level delay
Learn more: www.debugbear.com/blog/network...
September 8, 2025 at 1:30 PM
Did you know that how the network is throttled when running a page speed test impacts metrics?
🛠️ DevTools throttling is a simple minimum request duration
🏡 Lighthouse only simulates a slow-down
🐻 DebugBear & WebPageTest introduce a packet-level delay
Learn more: www.debugbear.com/blog/network...
🛠️ DevTools throttling is a simple minimum request duration
🏡 Lighthouse only simulates a slow-down
🐻 DebugBear & WebPageTest introduce a packet-level delay
Learn more: www.debugbear.com/blog/network...
¡Curso de Web Performance gratuito de WebPageTest!
Con certificado final
✓ Cómo mejorar tu web para que vayan más rápidas
✓ Aprende a analizar el rendimiento del sitio
✓ Optimiza imágenes y fuentes
✓ Monitoriza tus páginas web
www.webpagetest.org/learn/lightn...
Con certificado final
✓ Cómo mejorar tu web para que vayan más rápidas
✓ Aprende a analizar el rendimiento del sitio
✓ Optimiza imágenes y fuentes
✓ Monitoriza tus páginas web
www.webpagetest.org/learn/lightn...
September 5, 2025 at 2:58 PM
¡Curso de Web Performance gratuito de WebPageTest!
Con certificado final
✓ Cómo mejorar tu web para que vayan más rápidas
✓ Aprende a analizar el rendimiento del sitio
✓ Optimiza imágenes y fuentes
✓ Monitoriza tus páginas web
www.webpagetest.org/learn/lightn...
Con certificado final
✓ Cómo mejorar tu web para que vayan más rápidas
✓ Aprende a analizar el rendimiento del sitio
✓ Optimiza imágenes y fuentes
✓ Monitoriza tus páginas web
www.webpagetest.org/learn/lightn...
Step 1 — Audit every asset.
Run Lighthouse, WebPageTest, or your own script to list images, scripts, and styles.
Flag anything over 200 KB or that loads before paint.
Those are your first bottlenecks.
Run Lighthouse, WebPageTest, or your own script to list images, scripts, and styles.
Flag anything over 200 KB or that loads before paint.
Those are your first bottlenecks.
August 28, 2025 at 12:47 PM
Step 1 — Audit every asset.
Run Lighthouse, WebPageTest, or your own script to list images, scripts, and styles.
Flag anything over 200 KB or that loads before paint.
Those are your first bottlenecks.
Run Lighthouse, WebPageTest, or your own script to list images, scripts, and styles.
Flag anything over 200 KB or that loads before paint.
Those are your first bottlenecks.
I added a section about making better device choices on @catchpointsystems.bsky.social’s #WebPageTest: csswizardry.com/2025/08/low-...
Low- and Mid-Tier Mobile for the Real World (2025) – CSS Wizardry
Discover the most representative low- and mid-tier mobile devices for web performance testing in 2025.
csswizardry.com
August 20, 2025 at 4:14 PM
I added a section about making better device choices on @catchpointsystems.bsky.social’s #WebPageTest: csswizardry.com/2025/08/low-...
qantas.com is SLOW. product & engineering there mustn't have telemetry of the user experience. AND they pay for datadog.
Building web speed tracker to fix
v1: WebPageTest + PageSpeed + history + alerts.
v2: flow bottleneck + slow click detection
v3?: run in CI to prevent regressions
v4?: auto PRs
Building web speed tracker to fix
v1: WebPageTest + PageSpeed + history + alerts.
v2: flow bottleneck + slow click detection
v3?: run in CI to prevent regressions
v4?: auto PRs
August 16, 2025 at 3:15 PM
qantas.com is SLOW. product & engineering there mustn't have telemetry of the user experience. AND they pay for datadog.
Building web speed tracker to fix
v1: WebPageTest + PageSpeed + history + alerts.
v2: flow bottleneck + slow click detection
v3?: run in CI to prevent regressions
v4?: auto PRs
Building web speed tracker to fix
v1: WebPageTest + PageSpeed + history + alerts.
v2: flow bottleneck + slow click detection
v3?: run in CI to prevent regressions
v4?: auto PRs
You can now share your thoughts on vulnerability CVE-2012-10049 in Vulnerability-Lookup:
https://vulnerability.circl.lu/vuln/CVE-2012-10049
WPO Foundation - WebPageTest
#vulnerabilitylookup #vulnerability #cybersecurity #bot
https://vulnerability.circl.lu/vuln/CVE-2012-10049
WPO Foundation - WebPageTest
#vulnerabilitylookup #vulnerability #cybersecurity #bot
cvelistv5 - CVE-2012-10049
Vulnerability-Lookup - Fast vulnerability lookup correlation from different sources.
vulnerability.circl.lu
August 8, 2025 at 6:39 PM
You can now share your thoughts on vulnerability CVE-2012-10049 in Vulnerability-Lookup:
https://vulnerability.circl.lu/vuln/CVE-2012-10049
WPO Foundation - WebPageTest
#vulnerabilitylookup #vulnerability #cybersecurity #bot
https://vulnerability.circl.lu/vuln/CVE-2012-10049
WPO Foundation - WebPageTest
#vulnerabilitylookup #vulnerability #cybersecurity #bot
WebPageTest Arbitrary PHP File Upload RCEWebPageTest version 2.6 and earlier ... WebPageTest version 2.6 and earlier contains an arbitrary file upload vulnerability in the resultimage.php script. T...
Origin | Interest | Match
Origin | Interest | Match
CVE-2012-10049 | THREATINT
WebPageTest version 2.6 and earlier contains an arbitrary file upload vulnerability in the resultimage.php script. The application fails to validate or sanitize user-supplied input before saving uploaded files to a publicly accessible directory. This flaw allows remote attacke...
cve.threatint.eu
August 8, 2025 at 6:30 PM
🚨 TECHNICAL SEO REALITY CHECK 2025:
75% of sites STILL fail Core Web Vitals
→ LCP under 2.5s
→ FID under 100ms
→ CLS under 0.1
Your speed = Your rankings
Your UX = Your conversions
Tools that save you:
• PageSpeed Insights
• GTmetrix
• WebPageTest
Speed isn't optional anymore. It's survival.
75% of sites STILL fail Core Web Vitals
→ LCP under 2.5s
→ FID under 100ms
→ CLS under 0.1
Your speed = Your rankings
Your UX = Your conversions
Tools that save you:
• PageSpeed Insights
• GTmetrix
• WebPageTest
Speed isn't optional anymore. It's survival.
July 25, 2025 at 12:47 PM
🚨 TECHNICAL SEO REALITY CHECK 2025:
75% of sites STILL fail Core Web Vitals
→ LCP under 2.5s
→ FID under 100ms
→ CLS under 0.1
Your speed = Your rankings
Your UX = Your conversions
Tools that save you:
• PageSpeed Insights
• GTmetrix
• WebPageTest
Speed isn't optional anymore. It's survival.
75% of sites STILL fail Core Web Vitals
→ LCP under 2.5s
→ FID under 100ms
→ CLS under 0.1
Your speed = Your rankings
Your UX = Your conversions
Tools that save you:
• PageSpeed Insights
• GTmetrix
• WebPageTest
Speed isn't optional anymore. It's survival.
⚡Featured posts this week:
✨ New to the web platform: @rachelandrew.bsky.social
✨ We migrated 11ty increased perf by 24%: @danwebbb.bsky.social
✨ Embedding WebPageTest traces: @infrequently.org
✨ OSS Elevate Your Professional Journey: @felixarntz.bsky.social
🙏 Special thanks to the authors!
#webperf
✨ New to the web platform: @rachelandrew.bsky.social
✨ We migrated 11ty increased perf by 24%: @danwebbb.bsky.social
✨ Embedding WebPageTest traces: @infrequently.org
✨ OSS Elevate Your Professional Journey: @felixarntz.bsky.social
🙏 Special thanks to the authors!
#webperf
July 20, 2025 at 12:36 PM
⚡Featured posts this week:
✨ New to the web platform: @rachelandrew.bsky.social
✨ We migrated 11ty increased perf by 24%: @danwebbb.bsky.social
✨ Embedding WebPageTest traces: @infrequently.org
✨ OSS Elevate Your Professional Journey: @felixarntz.bsky.social
🙏 Special thanks to the authors!
#webperf
✨ New to the web platform: @rachelandrew.bsky.social
✨ We migrated 11ty increased perf by 24%: @danwebbb.bsky.social
✨ Embedding WebPageTest traces: @infrequently.org
✨ OSS Elevate Your Professional Journey: @felixarntz.bsky.social
🙏 Special thanks to the authors!
#webperf
This is why I am glad I leave the granular investigation to real devs. I hung up my dev hat years ago. & You lost me after your "I,m done, right?" Moment. 🤷♂️😬
I do GPSI, + WebPageTest reports. I get devs enough to deep dive. That's it.
I do GPSI, + WebPageTest reports. I get devs enough to deep dive. That's it.
May 15, 2025 at 7:31 AM
This is why I am glad I leave the granular investigation to real devs. I hung up my dev hat years ago. & You lost me after your "I,m done, right?" Moment. 🤷♂️😬
I do GPSI, + WebPageTest reports. I get devs enough to deep dive. That's it.
I do GPSI, + WebPageTest reports. I get devs enough to deep dive. That's it.
Working at midnight. WebPageTest has no less than three dozen tests in front of the line for any of the server locations I need to test from.
I guess I won't be testing WPT speeds on this audit tonight.
🤷♂️
I guess I won't be testing WPT speeds on this audit tonight.
🤷♂️
May 12, 2025 at 7:05 AM
Working at midnight. WebPageTest has no less than three dozen tests in front of the line for any of the server locations I need to test from.
I guess I won't be testing WPT speeds on this audit tonight.
🤷♂️
I guess I won't be testing WPT speeds on this audit tonight.
🤷♂️
But of course, I dumped that URL in WebPageTest to see what's happening under the hood. Always good to randomly look at how sites are built, and their performance + likely ux. There's always a teachable moment. If you're also curious (and are into it):
🔗 www.webpagetest.org/result/25042...
🔗 www.webpagetest.org/result/25042...
April 25, 2025 at 12:32 AM
But of course, I dumped that URL in WebPageTest to see what's happening under the hood. Always good to randomly look at how sites are built, and their performance + likely ux. There's always a teachable moment. If you're also curious (and are into it):
🔗 www.webpagetest.org/result/25042...
🔗 www.webpagetest.org/result/25042...
I’ve been afraid to enable the new UI for #WebPageTest because I wasn't certain I would be able to get back to the old UI.
But I took the leap today hoping I would find an easier way to run experiments blocking domains.
Has anyone else switched to the new UI yet? What is your impressions?
But I took the leap today hoping I would find an easier way to run experiments blocking domains.
Has anyone else switched to the new UI yet? What is your impressions?
March 20, 2025 at 4:29 PM
I’ve been afraid to enable the new UI for #WebPageTest because I wasn't certain I would be able to get back to the old UI.
But I took the leap today hoping I would find an easier way to run experiments blocking domains.
Has anyone else switched to the new UI yet? What is your impressions?
But I took the leap today hoping I would find an easier way to run experiments blocking domains.
Has anyone else switched to the new UI yet? What is your impressions?
Yesterday I was welcomed by Dutch Digital Agency Webreact @ their awesome office! 😀
With a group of 12, we went through all things #pagespeed:
1️⃣ #CoreWebVitals metrics
2️⃣ #Lighthouse vs #CrUX vs #RUM
3️⃣ WebPageTest & Chrome DevTools features
4️⃣ new browser APIs allowing us to use less JS
1/3
With a group of 12, we went through all things #pagespeed:
1️⃣ #CoreWebVitals metrics
2️⃣ #Lighthouse vs #CrUX vs #RUM
3️⃣ WebPageTest & Chrome DevTools features
4️⃣ new browser APIs allowing us to use less JS
1/3
March 19, 2025 at 4:15 PM
Yesterday I was welcomed by Dutch Digital Agency Webreact @ their awesome office! 😀
With a group of 12, we went through all things #pagespeed:
1️⃣ #CoreWebVitals metrics
2️⃣ #Lighthouse vs #CrUX vs #RUM
3️⃣ WebPageTest & Chrome DevTools features
4️⃣ new browser APIs allowing us to use less JS
1/3
With a group of 12, we went through all things #pagespeed:
1️⃣ #CoreWebVitals metrics
2️⃣ #Lighthouse vs #CrUX vs #RUM
3️⃣ WebPageTest & Chrome DevTools features
4️⃣ new browser APIs allowing us to use less JS
1/3
🏁 Sharing a link to the #webperf testing tool book that is again quietly used basically by many of the pros in the enterprise front end space, like engineers at google (which I personally know to be true). Curious? Check out why in the link below. Enjoy!
📚 www.google.ca/books/editio...
📚 www.google.ca/books/editio...
March 8, 2025 at 2:03 AM
🏁 Sharing a link to the #webperf testing tool book that is again quietly used basically by many of the pros in the enterprise front end space, like engineers at google (which I personally know to be true). Curious? Check out why in the link below. Enjoy!
📚 www.google.ca/books/editio...
📚 www.google.ca/books/editio...
WebPageTest has for MANY MANY years been the standard in web performance testing. The granular detail that it brings to anyone wishing to use it can provide the level of data that could only get you investigating issues that likely at the root of bottlenecks. 🧵⬇️
March 8, 2025 at 1:52 AM
WebPageTest has for MANY MANY years been the standard in web performance testing. The granular detail that it brings to anyone wishing to use it can provide the level of data that could only get you investigating issues that likely at the root of bottlenecks. 🧵⬇️