WebPerformance Report Week #13 is out! 
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15 posts13 participants3 posts today
Now everything is clear. It's time to be fast and precise.
https://webperformancereport.com/
#webperf #corewebvitals #ux #seo #bi
We are ready for Sunday's delivery! 
This week, we tested the #WebPerformance of #MercedesBenz 's website before the delivery, and everything works!
Check it out here: https://webperformancereport.com/report/wpt/250329_AiDc3F_49C?utm_source=webperfreport&utm_medium=mastodon
#webperf #corewebvitals #ux #seo
webperformancereport.comWeb Performance Report 2025 | Week #13 | www.mercedes-benz.com | 250329_AiDc3F_49CWeb performance report every week in your inbox.
Hey folks, the next episode of PerformanceObserver is now scheduled for 16 April with @verlok.bsky.social and @ethangardner.com ! See all details at performanceobserver.dev including add to calendar links with the join instructions.
#webperf
PerformanceObserver: A virtual...
Bluesky SocialAndrea Verlicchi (@verlok.bsky.social)I love to create and optimize websites. I'm passionate about web performance, accessibility and user experience. I write about the web on my tech blog, on Medium and Smashing Magazine, and I love to speak at web conferences.
#Business #Findings
Website downtime and slowtime costs · Speed issues can hurt your business more than outages https://ilo.im/162ve5
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#Studies #Cost #Design #ProductDesign #UxDesign #WebDesign #WebPerf #Development #WebDev #Frontend
SpeedCurveSpeedCurve | Downtime vs slowtime: Which costs you more?Page slowdowns can cause as much damage as downtime, hurting revenue, brand health, and permanent abandonment rate.
New blog post! https://blogs.igalia.com/dape/2025/03/25/trace-chrome-easy-remote-tracing-of-chromium/
In performance research, a principle is reducing the overhead of the analysis tools, to improve the accuracy. Tracing remotely helps: no need for the tracing UI, and no overhead of running it. Specially useful when Chromium runs in an embedded device.
trace-chrome is the tool I wrote to capture and store the traces from a different computer, with a simple command line interface. Check it at https://github.com/jdapena/trace-chrome
blogs.igalia.comtrace-chrome: easy remote tracing of ChromiumJosé Dapena blog.
WebPerformance Report Week #12 is out! Ready for next Week? Don’t miss out!
Join our growing community of #WebPerformance enthusiasts and subscribe today: https://webperformancereport.com
#webperf #corewebvitals #ux #seo
We are ready for Sunday's delivery!
This week, we tested the #WebPerformance of @IBM's website before the delivery, and everything works!
Check it out here: https://webperformancereport.com/report/wpt/250322_AiDcKV_4GR?utm_source=webperfreport&utm_medium=mastodon
#webperf #corewebvitals #ux #seo
webperformancereport.comWeb Performance Report 2025 | Week #12 | www.ibm.com | 250322_AiDcKV_4GRWeb performance report every week in your inbox.
One of the most common questions we hear is "Why do my numbers for the SAME metrics vary in DIFFERENT tools?"
Here are some of the most common reasons.
Takeaway: The most important thing to track is consistency and changes within a single monitoring tool and settings.
https://www.speedcurve.com/web-performance-guide/how-to-trust-your-metrics/
SpeedCurveHow to Trust Your Web Performance Metrics | SpeedCurveHave you ever wondered why you get different numbers for the same metrics using different tools? Here are some of the most common reasons.
Un collègue tout content de me montrer ses bons scores avec https://millecheck.ai/
Je teste sur mon site perso… et je lui envoie les résultats.
Oui, même si mon site est vieux et aurait vraiment besoin d'une refonte, j'ai encore de bons restes, mon jeune padawan 
Continued thread
Tous les sujets comptent.
#accessibilité, #design, #dev, #webperf, #éthique… on veut de tout.
Maintenant, on attend vos sujets ici : https://appel.paris-web.fr/
Bref.
Il vous reste 5 jours. 
Paris WebAppel à sujets – Paris Web 2025Paris Web, la conférence francophone des gens qui font un web accessible et de qualité. Prochaine édition les 25 et 26 septembre 2025.
#Development
PerformanCSS · “How CSS relates to web performance is a funny dance.” https://ilo.im/162uqq
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#CSS #CustomProperty #DOM #Rendering #Browser #WebPerf #WebDev #Frontend
ilo.imChris’ Corner: PerformanCSS – CodePen
I created a new #webperf resource that ranks the world’s top websites by Core Web Vitals performance.
You can use it to see how the most well known companies perform against their competitors, it's a fascinating read 
Calibre - Site Speed Tools for TeamsWebsite Speed Leaderboard - Top Sites Ranked by Core Web VitalsWorld’s top websites ranked by Core Web Vitals performance. See industry benchmarks and performance leaders.
Major site outages grab all the sexy headlines, but what if I told you that boring old page slowdowns actually may hurt your business more? This post includes suggested formulas for calculating the rough cost of downtime vs slowtime for your site.
SpeedCurveSpeedCurve | Downtime vs slowtime: Which costs you more?Page slowdowns can cause as much damage as downtime, hurting revenue, brand health, and permanent abandonment rate.
Hey folks, here’s your reminder that PerformanceObserver is back with our second episode tomorrow! @webx.bsky.social s and @keerthanak17.bsky.social will talk about LoAF and designing for bad performance. All details and add to calendar at performanceobserver.dev
#webperf
PerformanceObserver: A virtual...
Bluesky SocialVinicius Dallacqua (@webx.bsky.social)Front End Lead at Gilion, working on https://perflab.io, photography enthusiast, web performance nerd, normal person on Sundays and holidays.
PurgeCSS is a great tool for getting rid of unsused CSS. My personal site's CSS is now half the size that it used to be (both uncompressed and compressed)
https://purgecss.com/
#webPerf
purgecss.comPurgeCSS - Remove unused CSS | PurgeCSSPurgeCSS is a tool to remove unused CSS from your project
WebPerformance Report Week #11 is out! Ready for next Week? Don’t miss out!
Join our growing community of #WebPerformance enthusiasts and subscribe today: https://webperformancereport.com
#webperf #corewebvitals #ux #seo
Reminder!!! There's still time to get this week's #WebPerformance Report!
Don't miss out, subscribe now on our website: https://webperformancereport.com
#webperf
Have you ever asked yourself:
"Which should I invest in – synthetic *or* real user monitoring – to track the speed of my site?"
This article is for you.
https://www.speedcurve.com/web-performance-guide/synthetic-vs-real-user-monitoring/
SpeedCurveSynthetic versus Real User Monitoring | SpeedCurveHere are the pros and cons of synthetic and real user monitoring, and why you need both.
We are ready for Sunday's delivery!
This week, we tested the #WebPerformance of #BYD EUROPE's website before the delivery, and everything works!
Check it out here: https://webperformancereport.com/report/wpt/250314_AiDcFH_8C9?utm_source=webperfreport&utm_medium=mastodon
#webperf #corewebvitals #ux #seo
webperformancereport.comWeb Performance Report 2025 | Week #11 | www.bydeurope.com | 250314_AiDcFH_8C9Web performance report every week in your inbox.