Michal Mocny@mmocny

Find me: bsky.app/profile/mmocny.com Web Vitals, Speed Metrics and #webperf @ Google. Autodidactic Geek, Woodworker, Sailer. Proud Father of 3 boys.

 North Bruce Peninsula, Canada
mmocny.com
Joined April 2009
44 Photos and videos
Anyone test loading performance of Astro "spa mode" vs normal? docs.astro.build/en/guides/v… Without actually using any persistance or view transitions, and without speculation rules. Just plain loading perf. (Can't use field LCP-- I'm okay with just lab results.) @FredKSchott

View transitions

Enable seamless navigation between pages in Astro with view transitions.

docs.astro.build
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jhey ʕ•ᴥ•ʔ
@jh3yy
19 Apr 2024
Note how Chrome DevTools Remote Debug syncs with what is happening on the device 👀 Makes debugging device-specific API stuff a breeze 🤙
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Barry Pollard@tunetheweb
30 Jan 2024
For those playing with the Chrome Soft Navigations Experiment, we've published a Changelog of all the changes to this metric by Chrome version: chromium.googlesource.com/ch… We'll look to keep it up to date as we iterate this API.
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🪩 Web Performance calendar day 23 🔗 calendar.perfplanet.com/2023… 🍹 Rick Viscomi (@rick_viscomi) analyzes INP performance using real-world RUMvision data

Analysis of INP performance using real-world RUMvision data

If you're reading this, you probably already know that Interaction to Next Paint (INP) will become the new Core Web Vital metric for responsiveness in March 2024. INP has already been talked about a...

calendar.perfplanet.com
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Barry Pollard@tunetheweb
27 Nov 2023
DevTools update! We've added whiskers to the Interactions lane of a Performance trace:
Screenshot of the Interactions track of Chrome DevTools showing a Pointer event with a faint grey line before it (showing the time between the pointer event and the Task actually executing on the main thread), and after it (showing the time after finishing executing the event handler and before the next render happens).

ALT Screenshot of the Interactions track of Chrome DevTools showing a Pointer event with a faint grey line before it (showing the time between the pointer event and the Task actually executing on the main thread), and after it (showing the time after finishing executing the event handler and before the next render happens).

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Addy Osmani
@addyosmani
7 Nov 2023
We're making the web faster 🙏 Core Web Vitals & @googlechrome saved users 10,000 years of waiting for pages to load: blog.chromium.org/2023/11/ho… ~ Learn about the WebPerf work that enabled this in our new post.
Chrome saved users over 10,000 years of waiting for web pages to load. Our savings for LCP translate into 8,000 years saved for users waiting for pages to load on Android and 2,000 years in 2023 so far. On INP, we have saved users 800 years on Android and 450 years on Windows so far in 2023.

ALT Chrome saved users over 10,000 years of waiting for web pages to load. Our savings for LCP translate into 8,000 years saved for users waiting for pages to load on Android and 2,000 years in 2023 so far. On INP, we have saved users 800 years on Android and 450 years on Windows so far in 2023.

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Rum insights: excites! @TimVereecke
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This wiki article from MobX folks was first written in 2016, and I think it still perfectly captures the use cases for Observables vs Signals: github.com/mobxjs/mobx/wiki/…

Mobx vs Reactive Stream Libraries (RxJS, Bacon, etc)

Simple, scalable state management. Contribute to mobxjs/mobx development by creating an account on GitHub.

github.com
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Barry Pollard@tunetheweb
12 Jul 2023
Well it seems like a lot of you are getting emails from Google Search Console warning the INP on your site could be improved and you don't know what to make of them! So let's take a deep breath and delve into what this all means and how you should action them. 🧵 (1/20)
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Tammy Everts@tameverts
27 Jun 2023
As a user-focused #webperf metric, does Interaction to Next Paint actually correlate to user behaviour? @cliffcrocker analyzed RUM data from four different sites and found that overall there's a correlation between INP and conversions. speedcurve.com/blog/interact… #UX #CoreWebVitals
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Common Slugs: - Longa mora inputus - Reversio eventus - Mora praesentationis @screenspan
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Barry Pollard@tunetheweb
4 May 2023
We've updated the Web Vitals extension to provide more useful debugging information to help you optimise your Core Web Vitals. Read all about the new console logs here: web.dev/debug-cwvs-with-web-…

Performance panel: Analyze your website's performance  |  Chrome DevTools  |  Chrome for Developers

Analyze your website's load and runtime performance

developer.chrome.com
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Long Animation Frames (LoAF): explainer is a bit more comprehensive now and merged to main. github.com/w3c/longtasks/blo… Want to try it early ? Download Chrome Canary, enable experimental web-platform features, observe "long-animation-frame" performance entries. #webperf
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New York Folks! I'll be in town to chat INP with @mmocny at @nywebperf on April 4th! Hope to see you there! meetup.com/web-performance-n…
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Q for React folks: useTransition() will abort a render if I start a new transition mid-flight... are there any hooks for abort? useEffect() doesn't trigger, and startTransition() doesn't support returning a cleanup function... @dan_abramov @acdlite
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I'm just trying to cleanup work started from an async function. I've hooked up AbortController (not super convenient, is there a better pattern?) but I need a place to call .abort(). In my case, startTransition is called higher up in the component tree...
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This is one of the best talks I've seen in ages. How did I miss when it went up months ago?! piped.video/watch?v=PGLwRv64… @nomsternom
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use(cache(async function()...))
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fks
@FredKSchott
7 Mar 2023
NEW POST: We looked at 100,000+ real websites to understand how web frameworks actually perform across CWV, Lighthouse and more. astro.build/blog/2023-web-fr…

2023 Web Framework Performance Report | Astro

A look at how different web frameworks perform in the real world in 2023. Based on real-world, production data from HTTP Archive and Google Chrome.

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Tim Vereecke@TimVereecke
8 Feb 2023
On Boomerang version 1.66 and want to monitor INP in mPulse? Create a custom timer with settings: BOOMR.plugins.EventTiming.metrics.interactionToNextPaint #webperf #rum #inp
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