Joan León 🏞️⚡️ @nucliweb

⚡️ Web Performance Artisan | Co-Founder @perfreviews_ | @GoogleDevExpert in #WebTech | @cloudinary Ambassador nucliweb.net Girona, Catalunya Joined August 2008

Tweets

21K
Followers

12K
Following

4K
Likes

46K

DebugBear @DebugBear

6 days ago

When should you invest in performance? Our latest blog posts discusses the pros and cons of investing in performance engineering, and how different organizations get value for different reasons. debugbear.com/blog/performan…

1 2 2 356 0

Harry Roberts @csswizardry

5 days ago

A big (and retroactive) update. All Subscribers now get 100% OFF my entire Gumroad back catalogue: csswizardry.gumroad.com/l/subscribe

4 2 9 3K 3

Addy Osmani @addyosmani

2 weeks ago

Announcing Gemini 2.5 Flash Image! (Nano Banana) from @GoogleDeepMind. This model brings you state of the art image generation! Here's 7m of demos. Today marks a leap forward in AI-powered image creativity with the launch of stronger native image generation and editing in Gemini…

36 229 1K 153K 1K

Download Video

Joan León 🏞️⚡️ @nucliweb

2 weeks ago

Performance improvements in @threejs

Shota Matsuda 松田聖大 @shotamatsuda

2 weeks ago

Performance improvements in @threejs

0 2 18 4K 0

Download Image

0 0 5 517 1

Jakub Andrzejewski @jacobandrewsky

2 weeks ago

New week = new article 🎉 This time, I decided to write about optimizing @nuxt_js application for Core Web Vitals 🚀 Check it out 👇

1 4 19 2K 13

Download Image

Harry Roberts @csswizardry

2 weeks ago

I added a small section about picking more suitable devices on @RealWebPageTest: csswizardry.com/2025/08/low-an…

0 3 8 2K 0

Harry Roberts @csswizardry

3 weeks ago

trace.cafe is already set up to ingest zipped trace files, which is great news!

Harry Roberts @csswizardry

3 weeks ago

trace.cafe is already set up to ingest zipped trace files, which is great news!

0 1 5 5K 0

Download Image

2 1 7 3K 0

Joan León 🏞️⚡️ @nucliweb

3 weeks ago

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…

2 2 9 656 3

Download Image

Harry Roberts @csswizardry

3 weeks ago

Neat! M140 added `Save-Data` emulation:

2 1 5 3K 1

Download Image

Harry Roberts @csswizardry

3 weeks ago

New in M140!

0 1 5 5K 0

Download Image

Treo @__treo

4 weeks ago

Your monthly reminder: July 2025 CrUX data is available on Treo treo.sh/sitespeed

0 4 12 580 1

Download Image

DebugBear @DebugBear

4 weeks ago

@csswizardry @SpeedCurve @requestmetrics @suxbyrumvision @newrelic Thanks, added to our article on missing INP attribution data now! debugbear.com/blog/inp-attri… Also fixed a bug where we weren't showing the script source if it wasn't a valid URL 🙃

0 1 1 252 0

Jyrki Alakuijala 🇺🇦 @jyzg

4 weeks ago

Web Platform Dx Developer Signals for JPEG XL Please, consider giving it 👍 github.com/web-platform-d…

1 4 16 639 2

Harry Roberts @csswizardry

4 weeks ago

🤯 I can’t believe I only learned this yesterday: `//# sourceURL=inline:foo.js`

18 49 415 34K 393

Download Video

Harry Roberts @csswizardry

4 weeks ago

I spent the weekend working on a script that detects device and network characteristics. 👉 Insiders already have access to the code: csswizardry.gumroad.com/l/subscribe

5 3 27 8K 18

Download Image

Joan León 🏞️⚡️ @nucliweb

4 weeks ago

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…