Estela Franco
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guaca.bsky.social
Estela Franco
@guaca.bsky.social
2.1K followers 330 following 300 posts
Web Performance @ Shopify

Tired mom 👦👶
Passionate about Web Perf, Web Standards, TechSEO, & Rock Music.

Google Dev Expert in Web Technologies
#mujeresenseo

🌐 estelafranco.com
🐘 https://toot.cafe/@guaca

📍 Barcelona
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guaca.bsky.social
🚨 PerformanceObserver Episode 8 is next week on Nov 19 🚨

Come join us live for access to Q&A and general chat!

In this episode, @aarontgrogg.bsky.social will explain how to reduce JS Workload with No or Lo JS.

(🧵 1/2)
PerformanceObserver: A virtual web perf meetup
Join the PerformanceObserver virtual performance meetup to get all the latest web performance news and hang out with the community.
performanceobserver.dev
November 10, 2025 at 11:24 AM
guaca.bsky.social
Ya os corrijo yo el titular, @elpais.com: Muere James Watson, quien construyó su fama (y su Nobel) sobre el trabajo de Rosalind Franklin que nunca reconoció.

De nada.
November 8, 2025 at 12:11 PM
guaca.bsky.social
Did I just purchase a $100 phone? Absolutely! to see how badly many websites perform in the wild.

If your site is only fast on a flagship device, you're excluding millions of users. Stop designing for luxury! Emulators lie, low-cost hardware shows the truth.
November 5, 2025 at 5:10 PM
Reposted by Estela Franco
joshwcomeau.com
✨ It’s that time of year! The State of JavaScript 2025 survey is currently running. 😄

I take the survey every year. It’s a great way to keep up with all of the new features and APIs that have come to browsers in the past year.

stateofjs.com/en-US
State of JavaScript
stateofjs.com
November 3, 2025 at 3:45 PM
Reposted by Estela Franco
perfnow.nl
performance.now() 2026 will take place on 19th and 20th of November 2026. #perfnow.
November 1, 2025 at 8:21 AM
Reposted by Estela Franco
michael-hladky.bsky.social
Here you go! My first perf now as a speaker… it’s was amazing 🤩

docs.google.com/presentation...
PerfNow25 - Big Data, Zero JS: Cross-Browser Virtual scrolling
Big Data, Zero JS Cross-Browser Virtual Scrolling CONTAIN & CONTENT-VISIBILITY
docs.google.com
November 2, 2025 at 9:02 AM
Reposted by Estela Franco
stoyan.me
Fellow #perfnow fellows, a reminder that PerfPlanet calendar is coming this December for another edition. And it needs YOU. Please ask if you have any contribution ideas or concerns calendar.perfplanet.com/contribute/
Contribute
Passionate about a topic? Working on a new tool? Have a technique you want to teach? Research you've done? Tell the web performance community! Send your articles to [email protected]. Please include: ...
calendar.perfplanet.com
October 30, 2025 at 4:59 PM
Reposted by Estela Franco
andydavies.me
Making Sense of Long Animation Frames…

The slides from my #PerfNow talk are available on Notist

noti.st/andydavies/9...
Making Sense of LoAF by Andy Davies
Over time the web has become more reliant on JavaScript… but we’ve very little information on how its growth is affecting our visitors’ experience.
noti.st
October 31, 2025 at 4:23 PM
Reposted by Estela Franco
ethangardner.com
Here are mine: speakerdeck.com/ethangardner...
Web Performance Allies - PerfNow 2025
Image credits: https://commons.wikimedia.org/wiki/File:TAR_Detour_clue.png https://commons.wikimedia.org/wiki/File:Carach_Angren_M%C3%A9an_22_08_200…
speakerdeck.com
October 31, 2025 at 3:16 PM
Reposted by Estela Franco
henrihelvetica.bsky.social
For those who just watched @tunetheweb.com 's presentation, this is the SPDY STREAM he just posted about w/ @yoav.ws + @krzksz.bsky.social of Shopify. Thank again Barry!
#perfNow

🎥 youtu.be/DHgoULxvuJ8
person on stage during a presentation showing a slide that reads SPDY STREAM.
October 31, 2025 at 2:15 PM
Reposted by Estela Franco
tkadlec.bsky.social
Always, always happy to see @yoav.ws get a shout-out. So much incredible work has happened because of him. Most recent example—speculation rules in WebKit. #perfnow
October 31, 2025 at 2:18 PM
Reposted by Estela Franco
stuart-mcmillan.com
One of my favourite pictures from 2023 #perfnow @tunetheweb.com @andydavies.me
October 31, 2025 at 1:48 PM
Reposted by Estela Franco
tammyeverts.com
Loving @ethangardner.com’s talk about making #webperf allies! Totally agree that competitive benchmarking can get marketing folks excited about performance Fun fact: you can do that with @speedcurve.com!

#PerfNow

support.speedcurve.com/docs/competi...
How to Benchmark Your Site Speed Against Competitors
Knowing which of your competitors are faster than you is a great way to get web performance buy-in throughout your organization.
support.speedcurve.com
October 30, 2025 at 4:28 PM
guaca.bsky.social
TIL #perfnow
jackf.io Jack Franklin @jackf.io · 13d
#PerfNow request throttling is behind a flag in Canary right now, you can enable it in chrome://flags. But please be aware it's not fully feature complete yet and still being worked on! However it is coming to Chrome stable in the future 🙂
October 30, 2025 at 2:45 PM
guaca.bsky.social
Stuart on duty!
#perfnow
Stuart live-blogging at perfnow.
October 30, 2025 at 9:56 AM
Reposted by Estela Franco
tammyeverts.com
Here’s the study from Contentsquare, in which they analyzed Interaction to Next Paint for 997 retail sites. #PerfNow

contentsquare.com/blog/interac...
Interaction to next paint: business value
Interaction to Next Paint (INP) is the new Core Web Vital. Learn how INP affects user frustration, conversion, and bounce rates.
contentsquare.com
October 30, 2025 at 9:46 AM
Reposted by Estela Franco
tammyeverts.com
Slides from my @perfnow.nl talk — How Fast Is Fast Enough? — are up!

If you’re at #PerfNow (or even if you’re not) I’d love to talk about creating a delightful experience for your users.

speakerdeck.com/tammyeverts/...
How Fast Is Fast Enough? [PerfNow 2025]
It sounds like a simple question, but if you've been working in web performance long enough, you know the answer is far from straightforward. In this ke…
speakerdeck.com
October 30, 2025 at 9:30 AM
guaca.bsky.social
Day 1! First talk by @tammyeverts.com. How fast is fast enough?
#perfnow
Tammy on the PerfNow stage. Behind her, a slide reads as follows: Fast is magical. Fast eliminates cognitive friction. Raycast surfacing the right application before you finish typing feels like an extension of your mind. Superhuman's sub-100ms rule—plus their focus on keyboard shortcuts-changed the email game in a way that no one's been able to replicate, let alone beat. I recently used Mercury to pay another business that uses Mercury, and its instant settle felt surprising in a world where bank transfers usually take days. Catherine Jue, Co-founder at Kernel catherinejue.com/fast
October 30, 2025 at 8:53 AM
Reposted by Estela Franco
tkadlec.bsky.social
New case study on wpostats.com

Relive improved LCP by 50% and cut out layout shifts and saw a 3% increase in conversion rate, 6% decrease in bounce rate and 9% increase in page views per session.

wpostats.com/2025/10/02/r...
October 2, 2025 at 3:15 PM
Reposted by Estela Franco
tunetheweb.com
I mentioned before that we’re switching Lighthouse Performance audits to the new and improved Insights. The same Insights that you can see in DevTools Performance panel traces.

That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!
October 7, 2025 at 8:02 PM
Reposted by Estela Franco
infrequently.org
I've been implementing some improvements in my @11ty.dev blog, mostly related to performance and deferred code loading. I'm pretty happy with the results, and hope they might be useful to someone else too:

infrequently.org/2025/10/11ty...
11ty Hacks For Fun and Performance - Infrequently Noted
Alex Russell on browsers, standards, and the process of progress.
infrequently.org
October 4, 2025 at 8:04 PM
guaca.bsky.social
Esta semana hemos visto otro caso de marketing agresivo disfrazado de formación gratuita.

Un curso online de 3 días anunciado como “gratuito” y con “certificado” que acabó siendo, en su último día, un embudo para vender un supuesto “Máster” de 1500 €.

(1/4)
October 4, 2025 at 11:49 AM
Reposted by Estela Franco
jakearchibald.com
I'm in Liverpool this weekend. Chatted to a local old white bloke who spoke with pride about the city having the first mosque in the country, and the first chinatown. And… fuck, I needed to hear that kind of positivity.
September 14, 2025 at 11:54 AM
Reposted by Estela Franco
sia.codes
Hey folks, I'm looking to schedule the next PerformanceObserver meetup and need some new CFP submissions.

I have a few experienced #webperf speakers on there, but I like to break it up with either newer speakers or new-to-webperf speakers.

performanceobserver.dev/call-for-pap...
Call for speakers | PerformanceObserver
Come speak at the PerformanceObserver virtual performance meetup! Speakers of all experience levels welcome.
performanceobserver.dev
September 4, 2025 at 6:57 PM