Joan León 🏞️⚡️
@nucliweb
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⚡️ Web Performance Artisan | Co-Founder @perfreviews_ | @GoogleDevExpert in #WebTech | @cloudinary Ambassador
Girona, Catalunya
Joined August 2008
I have published a website with Web Performance Snippets to make it more user-friendly, more orderly, and with a search feature. ⚡️💾 #WebPerf #Performance #PerfTools.
webperf-snippets.nucliweb.net
A curated list of snippets to get Web Performance metrics to use in the browser console or as snippets on Chrome DevTools by Joan León
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RT @addyosmani: Announcing Gemini 2.5 Flash Image! (Nano Banana) from @GoogleDeepMind. This model brings you state of the art image generat….
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#WebPerfTip. If you need a GitHub Action to automatically compresses JPEGs, PNGs and WebPs in pull requests, IMHO this is the best option. #WebPerf #ImagePerf #PerfTools #Image
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RT @jacobandrewsky: New week = new article 🎉. This time, I decided to write about optimizing @nuxt_js application for Core Web Vitals 🚀. Ch….
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Test TTFB From Multiple Test Locations.by @DebugBear.
debugbear.com
Measure Time to First Byte performance from multiple global test locations.
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Do you have a website with international visitors?. Check the Time to First Byte (TTFB) from different locations, and create a plan to improve it if your visitors are having a bad experience. Start testing today, links in the first comment. #WebPerf #PerfTools #Performance
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RT @csswizardry: I added a small section about picking more suitable devices on @RealWebPageTest:
csswizardry.com
Discover the most representative low- and mid-tier mobile devices for web performance testing in 2025.
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Small Details, Big Impact on Web Performance. During a recent web performance audit, I came across an interesting case:. 1️⃣ A favicon.ico that redirected (301) to another URL with a language parameter. 2️⃣ The final URL didn’t exist, returning an uncompressed 13 MB HTML page. It
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RT @DebugBear: @csswizardry @SpeedCurve @requestmetrics @suxbyrumvision @newrelic Thanks, added to our article on missing INP attribution d….
debugbear.com
Find out how to fix unattributed script source URLS and improve your INP monitoring data.
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RT @jyzg: Web Platform Dx Developer Signals for JPEG XL. Please, consider giving it 👍.
github.com
This GitHub issue is for collecting web developer signals for JPEG XL. The JPEG XL image format is a raster graphics file format that supports animation, alpha transparency, and lossy as well as lo...
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RT @csswizardry: 🤯 I can’t believe I only learned this yesterday:. `//# sourceURL=inline:foo.js`
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RT @csswizardry: I spent the weekend working on a script that detects device and network characteristics. 👉 Insiders already have access t….
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In a book about Web Performance, when technical references are made, which would you prefer?. 1️⃣ Link to external references, keeping the reading high-level. 2️⃣ Go into detail with the technical explanation. 3️⃣ Both options, with the deep dive in a distinct visual format so it.
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RT @csswizardry: 🚴💨For all you weekend warriors, I recently wrote an epic. Who has the fastest SITE in the Tour de France?. .
csswizardry.com
How fast are pro cycling teams’ and manufacturers’ websites? A CrRRUX-powered deep dive into bike brand performance, visibility, and missed opportunities.
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RT @DebugBear: Wondering how to fix your slow website? We've got a new post out on our blog today:. ⁉️ Find out common causes of poor perfo….
debugbear.com
Find out what causes slow loading websites, how to identify page load problems, and what optimizations have the biggest impact to solve your page speed problems.
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