#WebPerf is an active hashtag on Bluesky. In the last 30 days, 18 people shared 44 posts with it — around 1 a day. Activity is down 14% versus the previous week, peaking on Aug 25 with 8 posts.

Posts with #WebPerf

Annie Sullivan

@anniesullie.com

almost 2 years ago

Hey everyone! I ended my #perfnow talk by asking you all to consider contributing to the broader #webperf community. And one project I called out was e18e.dev. They're trying to connect together people working on JS packages performance (example below). Please consider joining their discord!

Michael Shilman @shilman.net

We're fixing Storybook bloat, one dependency at a time! 🔪 @storybookjs.bsky.social

Storybook package dependency graphs for v8.2 (L), v8.3 (M), v8.4 (S)

6 30 103

Joan León

@nucliweb.net

2 months ago

In my audits, reading the Performance profile is where people get stuck: the flame chart and waterfall look like noise at first I built an interactive guide to make them click, every figure is interactive, plus LCP, CLS, INP and the Insights panel perf.reviews/profile-guide #WebPerf #DevTools

perf.reviews

Reading a Performance Profile: Field Guide

An interactive field guide to the Chrome DevTools Performance panel: waterfall, flame chart, LCP, CLS, INP, and the Insights panel.

3 23 82

Paul Calvano

@paulcalvano.bsky.social

almost 2 years ago

Last week I gave a talk at the #PerfNow conference titled “Performance Mistakes”. I started off explaining a bit about Etsy’s blameless culture, and how it’s ok to make mistakes. Then I shared 17 common #webperf mistakes using @httparchive.org data, with examples. www.slideshare.net/slides….

www.slideshare.net

Performance Now '24- Performance Mistakes - Final.pdf

Performance Now '24- Performance Mistakes - Final.pdf - Download as a PDF or view online for free

2 23 63

Ariel Salminen

@arielsalminen.com

almost 2 years ago

Hei all new followers! 👋🏻 I’m Arielle and into #DesignSystems, #Design, #WebComponents, #WebStandards, #WebPerf, #a11y, #IndieWeb, #Inclusion, #Typography, #Frontend and more…! There may be (lots?) of shitposting as well. Delighted to meet you 🩷🌸🏳️‍🌈

3 3 62

Joan León

@nucliweb.net

11 months ago

"0 kB of JavaScript is not a feature" - @rich-harris.dev #perfnow #WebPerf

A speaker is presenting at the performance.now() 2025 conference in front of an audience. The slide behind them reads “0 kB of JavaScript is not a feature,” with the second line highlighted in red.

2 4 56

Alex Russell

@infrequently.org

over 1 year ago

Every web deve...sorrry, "full stack engineer", should watch this talk by @programmingart.bsky.social : fosdem.org/2025/schedule/ev…

3 4 48

Riccardo Margiotta

@riccardomargiotta.co.uk

almost 2 years ago

Web performance and accessibility go hand in hand. To make a radio button in Material UI, you need 6 HTML elements, 66 CSS selectors, and 30KB minified JavaScript. Don't throw out what the browser gives us for free. #PerfNow #webperf @ericwbailey.website

1 10 45

Firefox Performance

@firefoxperformance.bsky.social

almost 2 years ago

We're excited to share that Mozilla and @wikimedia.bsky.social will once again be hosting a #webperf devroom at @fosdem.bsky.social 2025! The call for participation is open until December 1st. Find details on how to submit your proposal at wiki.mozilla.org/Performa…. #fosdem #cfp

wiki.mozilla.org

FOSDEM 2025 - Call for Participation - MozillaWiki

3 19 44

Robin Marx

@programmingart.bsky.social

almost 2 years ago

My talk from this year's We Love Speed is on YouTube! 👇 In "Tight Mode: how browsers REALLY load web pages", I take a very deep/very nerdy dive into why browsers sometimes intentionally delay loading resources, why they all do it differently, and why they should *stop clowning around* 🤡 #webperf

www.youtube.com

How browsers REALLY load Web pages — Robin Marx

YouTube video by We Love Speed

5 20 42

Sia Karamalegos

@sia.codes

over 1 year ago

📣 I'm so excited to announce a new meetup I started! PerformanceObserver is a virtual meetup for the frontend web performance community! The first event will be announced shortly. You can join the newsletter to make sure you don't miss an event. #webperf performanceobserver.dev

performanceobserver.dev

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.

4 18 42

Tammy Everts 🍁

@tammyeverts.com

11 months ago

Interesting! Etsy implemented speculation rules and got these results: 👍 Time to First Byte on the listing page improved 23.6% 👍 First Contentful Paint improved 20.7% 👍 Largest Contentful Paint improved 21.1% 👍 DOMContentLoaded improved 20.4% #PerfNow #webperf www.etsy.com/codeascraft/...

www.etsy.com

2 10 38

Tammy Everts 🍁

@tammyeverts.com

over 1 year ago

I recently published my annual dive into the @httparchive.org, focusing on page growth, #webperf and #ux: www.speedcurve.com/blog/p…. A common question is "How big SHOULD my pages be?" According to analysis by @infrequently.org, the ideal page should be <1.4 MB with <365 KB coming from JS.

A table that gives ideal versus actual page size and JavaScript size:

The ideal JS weight is under 365 kilobytes. The actual median JS weight is 650 kilobytes. The actual JS weight at the 90th percentile is 1825 kilobytes.

The ideal total page weight is under 1.4 megabytes. The actual median page weight is 2.6 megabytes. The actual JS weight at the 90th percentile is 11.1 megabytes.

3 14 37

Joseph Scott

@josephscott.bsky.social

about 7 hours ago

One more 👍 - the progressive rendering that I've seen from both AVIF and JXL look good, with those widely supported I'd ditch any other color blur pre-fill approach. #webperf

0 0 1

Lionel Péramo

@lionel-peramo.com

1 day ago

You use Promises for every async task. Tomorrow, you might use scheduler.postTask instead. They handle tasks in very different ways. Here is how they change web performance. #JavaScript #WebPerf #WebDev 1/5

1 0 1

westbrook

@westbrook.mastodon.social.ap.brid.gy

2 days ago

What sort of performance profile do you want to see in your component library/design system before you even START building your app? Don't let your dogs latest $1MM start-up idea get dragged down by bad out of the box decisions (no matter "who" is making […] [Original post on mastodon.social]

Various component library providers and their FCP and LCP numbers for a mid-complexity showcase site, no deep functionality, server connectivity, or the like. Just the bones...and how much they cost your users.

0 0 1

Glitch Replay

@glitchreplay.bsky.social

2 days ago

If your site feels fast in DevTools but ranks poorly in Google, you're likely seeing the gap between lab simulations and actual device thermal throttling. #glitchreplay #errortracking #sessionreplay #bugmonitoring #webperf #rum 2/2

0 0 0

Joan León

@nucliweb.net

3 days ago

The case against JPEG XL Investigating JPEG XL's place as a Web image codec, by @giannirosato.com, via @webperfreport.bsky.social giannirosato.com/blog/pos…. #JPEGXL #JXL #ImagePerf #WebPerf

A dark-themed line chart titled “SSIMULACRA2,” showing BD-Rate (%) versus encoding speed in milliseconds for several image codecs. Colored lines compare codecs including AOM, JPEG XL, aperture-alpha, Iris-WebP, libjxl, SVT-AV1, and libwebp, with labeled data points. Most curves show higher BD-Rate at slower speeds, while some reach negative BD-Rate at faster speeds.

0 2 3

WebPerformance Report

@webperfreport.bsky.social

3 days ago

⚡Featured posts this week: ✨ New ad metrics in CrUX: @alextcone.bsky.social ✨ The case against JPEG XL: @giannirosato.com ✨ Why Spotify Is Not Using Bayesian A/B Testing: Mattias Frånberg, Mårten Schultzberg ✨ International SEO: @polemicdigital.com 🙏 Special thanks to the authors! #webperf

WebPerformance Report performance email preview highlighting optimization scores, Perf Links, and Core Web Vitals metrics on a colorful gradient background.

1 1 3

WebPerformance Report

@webperfreport.bsky.social

3 days ago

🎉 WebPerformance Report Week #38 is out! ✅ Join our growing community: ⚡ Performance Report 🛡️ Security Report ♿ Accessibility Report 📊 Analytic Report 🔎 SEO Report Explore our report catalog 👉 webperformancereport.com #webperf #websecurity #a11y #analytics #seo #ai

Five WebPerformance Report email examples showing web performance, accessibility, security, analytics and SEO reports on a colorful gradient background.

0 0 1

Lionel Péramo

@lionel-peramo.com

7 days ago

Can you speed up your app at server startup? PHP preloading loads files into memory in advance. This helps your server answer requests much faster. #PHP #WebPerf #DevOps 1/5

PHP code demonstrating how to preload classes and functions in PHP 7.4. The code shows three calls to the `opcache_compile_file` function, with explanatory comments. Two of the calls preload PHP class files, and the last one preloads a file of functions.

1 0 1

Inautilo

@inautilo.bsky.social

9 days ago

#Design #Examples The invisible side of design engineering · “A lot of what makes a great experience is invisible.” ilo.im/16g52q by Jakub Krehel _____ #DesignEngineers #WebPerf #Accessibility #InvisibleDesign #ProductDesign #UiDesign #WebDesign #Development #WebDev #Frontend

ilo.im

The invisible side of design engineering

A look at the invisible side of design engineering.

0 0 1

Etechinvest

@etechinvest.bsky.social

9 days ago

Quick performance checklist for web devs — key metrics and fixes in the image. #webperf #webdev

0 0 0

Lionel Péramo

@lionel-peramo.com

10 days ago

Is your website slow? The PerformanceObserver API helps you find out why. Here is how it works. #WebDev #WebPerf #JavaScript 1/5

Example of JavaScript code using the PerformanceObserver API to observe resources taking more than 500ms to load.

1 0 1

WebPerformance Report

@webperfreport.bsky.social

10 days ago

⚡Featured posts this week: ✨ Resource Age and Its Impact on Cacheability: @paulcalvano.bsky.social ✨ Increased INP impact from Meta Pixel: @erwinhofman.bsky.social ✨ Native is now the future of mobile: Mustafa Ali ✨ UNO Is Underrated: @csswizardry.com 🙏 Special thanks to the authors #webperf

WebPerformance Report security report highlighting the scan summary, key results, scoring details, and recommended web performance resources.

1 0 1

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