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Aaron T. Grogg

@aarontgrogg.com
380 followers 261 following 298 posts

Web Performance Architect Core Web Vitals Specialist aarontgrogg.com

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Aaron T. Grogg @aarontgrogg.com · 28/09/2026
Your holiday campaign is ready, but what about your website? Performance issues can ruin your marketing investment. Your marketing campaign gets customers to the door. Your website has to get them through it.
aarontgrogg.com
Your Holiday Campaign Ready. Is Your Website?
Your holiday campaign may be ready, but is your website ready for the traffic? A slow page, unexpected layout shift, or delayed interaction can ruin your marketing investment. Don't wait until the campaign launches, now is the time to check for issues. My Web Performance Assessment can identify where you should focus. Your marketing campaign gets customers to the door. Your website has to get them through it.
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Aaron T. Grogg @aarontgrogg.com · 25/09/2026
Keep track of your customers' experience. Learn how performance monitoring can help you fix today's problems and prevent tomorrow's. aarontgrogg.com/blog/2026/09...
Visualization of an ideal performance monitoring approach: Real Users → RUM → Investigation → Fix → Synthetic Testing → CI → Release → Real Users
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Aaron T. Grogg @aarontgrogg.com · 23/09/2026
Web Performance issues can kill a marketing campaign, wasting time and resources, hurting your ROI and bottom line. Learn to recognize web performance issues "in the wild", how they are represented by Core Web Vitals, and how you and your team can use them to resolve user experiences issues before…
aarontgrogg.com
How to Recognize Web Performance Issues: A Visual Guide to Core Web Vitals
Web Performance issues can kill a marketing campaign, wasting time and resources, hurting your ROI and bottom line. Learn to recognize web performance issues "in the wild", how they are represented by Core Web Vitals, and how you and your team can use them to resolve user experiences issues before your holiday shoppers arrive!
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Aaron T. Grogg @aarontgrogg.com · 21/09/2026
The holiday shopping season is the most important time of the year for many businesses. But getting someone to your website is only half the job; what happens when they get there? Web performance issues create frustrated users. And frustrated users don't wait, they leave. Learn how to find, and…
aarontgrogg.com
Holiday Shopping Starts Before the Sales: Why Web Performance Matters
The holiday shopping season is the most important time of the year for many businesses. But getting someone to your website is only half the job; what happens when they get there? Web performance issues create frustrated users. And frustrated users don't wait, they leave. Learn how to find, and fix, web performance issues before your holiday shoppers arrive!
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Aaron T. Grogg @aarontgrogg.com · 03/09/2026
I’m still seeing Lake Ontario in Google Maps, but they are hedging with “Gulf of Mexico (Gulf of America)”… Apple Maps is in full a$$-kissing mode. But yeah, MapQuest remains true… Will try it for a while, and deleting Apple Maps yet again…
Google Maps still using Lake OntarioGoogle Maps sadly using Gulf of AmericaApple Maps using Lake AmericaMapQuest still using Lake Ontario
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Aaron T. Grogg @aarontgrogg.com · 01/09/2026
I reduced this PLP's LCP by nearly 3s just by replacing the JS animation with CSS animation. #NoLoJS FTW.
aarontgrogg.com
Reduce LCP by nearly 3s by replacing JS animation with CSS
I reduced this PLP's LCP by nearly 3s just by replacing the JS animation with CSS animation. #NoLoJS FTW.
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Aaron T. Grogg @aarontgrogg.com · 31/08/2026
SRE roles seem to have exploded onto the scene, with frontend performance tossed into the description as if they were free breadsticks. Any idea why the shift of performance focus?
aarontgrogg.com
Why has SRE become such a big role?
SRE roles seem to have exploded onto the scene, with frontend performance tossed into the description as if they were free breadsticks. Any idea why the shift of performance focus?
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Aaron T. Grogg @aarontgrogg.com · 26/08/2026
Hey, @wordpress.com, 7.1 upgrade, not a great look, just in case it hasn't been reported yet...
WP 7.1 upgrade renders my favicon logo over top of my admin dashboard, blocking part of the page.
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Aaron T. Grogg @aarontgrogg.com · 20/08/2026
During a client audit, I re-encountered a common, annoying, and harmful, pattern: dupe HTML, instead proper responsive design. Can we please stop this? Happy reducing!
aarontgrogg.com
This “double HTML” pattern must stop!
During a client audit, I re-encountered a common, annoying, and harmful, pattern: dupe HTML, instead proper responsive design. Can we please stop this? Happy reducing!
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Aaron T. Grogg @aarontgrogg.com · 17/08/2026
TIL: There is a thing called Server-Timing Headers Sharing a few details related to my latest finding from around the world-wide web: Server-Timing Headers Happy timing!
aarontgrogg.com
TIL: There is a thing called Server-Timing Headers
Sharing a few details related to my latest finding from around the world-wide web: Server-Timing Headers Happy timing!
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Aaron T. Grogg @aarontgrogg.com · 14/08/2026
WebMCP could fundamentally change how websites are consumed. The more I dig, the more I wonder whether websites will need visible content?
aarontgrogg.com
Looking into WebMCP, I wonder if websites will even need visible content
WebMCP stands to fundamentally change how websites are consumed. The deeper I dig, the more I start to wonder whether or not websites in the future will even need visible content?
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Aaron T. Grogg @aarontgrogg.com · 11/08/2026
Presenting a Web Performance MasterClass at the WeAreDevelopers World Congress I will be presenting an all-day Web Performance MasterClass at the WeAreDevelopers World Congress in San Jose, CA from September 23-25, 2026. I have a discount registration codes available if you're interested in…
aarontgrogg.com
Presenting a Web Performance MasterClass at the WeAreDevelopers World Congress
I will be presenting an all-day Web Performance MasterClass at the WeAreDevelopers World Congress in San Jose, CA from September 23-25, 2026. I have a discount registration codes available if you're interested in attending.
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Aaron T. Grogg @aarontgrogg.com · 04/08/2026
A fascinating read from @codepo8.bsky.social: Powerful quote: "Recognize fascism as a technique, not a legitimate ideology or ordinary party. ... Once democracies understand it instead as a hostile technique for destroying democracy from within, the response becomes conceivable." 👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏👏
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Aaron T. Grogg @aarontgrogg.com · 08/04/2026
Investigating Wish.com's high LCP led me down a rabbit hole of performance paper cuts. But I was able to reduce their LCP from 7.12s to 1.67s, and that was with only a couple of my recommended improvements in place. Read to find out how!
aarontgrogg.com
Investigating… a High LCP for Wish.com
Investigating Wish.com's high LCP led me down a rabbit hole of performance paper cuts. But I was able to reduce their LCP from 7.12s to 1.67s, and that was with only a couple of my recommended improvements in place. Read to find out how!
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Aaron T. Grogg @aarontgrogg.com · 31/03/2026
Comparing three similar, but quite different, "pre-fetch" techniques, explaining how they are similar, how they are different, when each should be used, and how together they create a powerful performance trio.
aarontgrogg.com
Early Hints vs. Resource Hints vs. Speculation Rules: Which is right for what, and when?
Comparing three similar, but quite different, "pre-fetch" techniques, explaining how they are similar, how they are different, when each should be used, and how together they create a powerful performance trio.
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Aaron T. Grogg @aarontgrogg.com · 26/03/2026
Getting excited to hop on this call with the great @henrihelvetica.bsky.social! Who's joining???
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Aaron T. Grogg @aarontgrogg.com · 25/03/2026
TTFB? FCP? LCP? INP? CLS? Something else? What's your most important perf metric?
aarontgrogg.com
What’s the Most Important Performance Metric?
TTFB? FCP? LCP? INP? CLS? Something else? What's your most important perf metric?
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comiCSS @comicss.art · 11/03/2026
New game! This week, it is a HTML-themed crossword. Play online at: comicss.art/games/12/ #css #html #game #crossword #webDev
comicss.art
comiCSS
comiCSS Games: games about CSS. Coded in CSS (mostly).
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Aaron T. Grogg @aarontgrogg.com · 03/03/2026
The absolute fool-fuckery is astounding… I doubt these idiots can even put their own pants on…
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Aaron T. Grogg @aarontgrogg.com · 03/03/2026
Brava!! 🎉🥳
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404 Media @404media.co · 03/03/2026
SCOOP: An internal DHS document obtained by 404 Media shows for the first time CBP used location data sourced from the online advertising industry to track phone locations. This surveillance can happen through all sorts of apps, such as video games, news apps, weather trackers, and dating apps.
404media.co
CBP Tapped Into the Online Advertising Ecosystem To Track Peoples’ Movements
An internal DHS document obtained by 404 Media shows for the first time CBP used location data sourced from the online advertising industry to track phone locations. ICE has bought access to similar t...
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Aaron T. Grogg @aarontgrogg.com · 03/03/2026
This would be a great addition to every CMS, as a page is published/updated, right before it is cached! 🥰
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Joan León @nucliweb.net · 03/03/2026
Taught Claude Code to prioritise loading the first image in a post 😉 #WebPerf
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Aaron T. Grogg @aarontgrogg.com · 03/03/2026
Speedcurve’s Page Speed Benchmarks reported Costco.com's LCP averaging at 6.85s. But could it be that CLS is at least part of the problem? Read to find out!
aarontgrogg.com
Investigating… can CLS cause a high LCP?
Speedcurve’s Page Speed Benchmarks reported Costco.com's LCP averaging at 6.85s. But could it be that CLS is at least part of the problem? Read to find out!
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Aaron T. Grogg @aarontgrogg.com · 26/02/2026
On February 18, 2026, I sat down with Chrisitan Heilmann of Coffee with Developers to chat about NoLoJS and lots and lots of other web-type stuff. Have a listen and let me know what you think!
aarontgrogg.com
NoLoJS Featured on the Coffee with Developers Podcast
On February 18, 2026, I sat down with Chrisitan Heilmann of Coffee with Developers to chat about NoLoJS and lots and lots of other web-type stuff. Have a listen and let me know what you think!
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Aaron T. Grogg @aarontgrogg.com · 25/02/2026
Speedcurve’s Page Speed Benchmarks reported Nike.com's LCP averaging at 4.36s. I got it down to 1.36s. Read to find out how! @Nike
aarontgrogg.com
Investigating… a High LCP for Nike.com
Speedcurve’s Page Speed Benchmarks reported Nike.com's LCP averaging at 4.36s. I got it down to 1.36s. Read to find out how! @Nike
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Aaron T. Grogg @aarontgrogg.com · 19/02/2026
After YEARS of the same design and having only a blogroll as my home page, I decided to add a landing page in front. Things are likely to change, but would love to hear what you think so far!
aarontgrogg.com
Home page update
After YEARS of the same design and having only a blogroll as my home page, I decided to add a landing page in front. Things are likely to change, but would love to hear what you think so far!
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Aaron T. Grogg @aarontgrogg.com · 18/02/2026
An upgrade to the NoLoJS repo, adding an auto-generated static documentation site, with loads of bells and whistles. Would love to hear your thoughts! Happy reducing!
aarontgrogg.com
NoLoJS Repo Gets New Doc Pages
An upgrade to the NoLoJS repo, adding an auto-generated static documentation site, with loads of bells and whistles. Would love to hear your thoughts! Happy reducing!
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Aaron T. Grogg @aarontgrogg.com · 16/02/2026
The latest installment in my "Today's Readings" series, offering my rants and thoughts based on findings from around the world-wide web, including Accessibility, CSS, CWV, Design, DevTools, HTML, JS, NoLoJS, Performance, Shopify, Speculation Rules and more. Happy reading!
aarontgrogg.com
Today’s Readings
The latest installment in my "Today's Readings" series, offering my rants and thoughts based on findings from around the world-wide web, including Accessibility, CSS, CWV, Design, DevTools, HTML, JS, NoLoJS, Performance, Shopify, Speculation Rules and more. Happy reading!
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Andy Clarke @allthatmalarkey.bsky.social · 16/02/2026
👉 I made sho!io. Share what you’re working on without the social noise. I’ve been quietly working on a side project called sho!io, and I’m opening it up for feedback and testing. You can read more about it: stuffandnonsense.co.uk/blog/i-made-... And join the waiting list: sholio.app/waitlist
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Aaron T. Grogg @aarontgrogg.com · 16/02/2026
First time I hope hell exists for these people…
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Florian Schepp @scheppening.com · 16/02/2026
Just shipped bsky-comments! Embed Bluesky threads anywhere with a zero-dependency Web Component. • Framework Agnostic (Native WC) • < 3kb gzipped • Zero Config: Just paste the Post URL • Light DOM: Fully customizable (CSS/Tailwind) github.com/florianschep... #webdev #opensource #buildinpublic
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Ana Tudor @anatudor.bsky.social · 04/02/2026
Hire me for small projects ko-fi.com/anatudor/com...
ko-fi.com
Ana Tudor's Commissions
If you like my work and you want me to be able to continue coding, please consider supporting it.
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Nadia Makarevich @adevnadia.bsky.social · 16/02/2026
I'm running 30% off both my books for those who still read real books! 💸 Interested in learning the fundamentals of React and Web performance? Don't miss out! Real humans writing real books is a rarity these days 😅 🧵👇🏼
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Aaron T. Grogg @aarontgrogg.com · 15/02/2026
Sounds about right, these f-ing wanna be thugs…
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Aaron T. Grogg @aarontgrogg.com · 15/02/2026
In. Sane.
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Anil Dash @anildash.com · 14/02/2026
Hey, I’m gonna try something new! If you’ve got a question about the tech industry (can be about how it works, why they make products the way they do, what a term means, etc.) I’m gonna try to answer some Q&A in the short roundup weekly videos I’ve been doing. Just reply, DM or email your question.
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Aaron T. Grogg @aarontgrogg.com · 15/02/2026
Because of course free speech only matters when it is *their* free speech, right???
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NY Times Pitchbot @nytpitchbot.bsky.social · 14/02/2026
Doctors say that vaccines protect children from dangerous diseases. A nepo baby who barbecues dogs and snorts cocaine off toilet seats says that vaccines make children vulnerable to 5G radiation. For busy parents, it can be hard to know who to trust.
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Aaron T. Grogg @aarontgrogg.com · 06/02/2026
Yep.
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Aaron T. Grogg @aarontgrogg.com · 06/02/2026
The latest installment in my "Today's Readings" series, offering my rants and thoughts based on findings from around the world-wide web, including A11Y, AI, CSS, CSV, Debugging, DevTools, JS, NoLoJS, Performance, Progressive Enhancement, RWD, UI, UX, WP and more. Happy reading!
aarontgrogg.com
Today’s Readings
The latest installment in my "Today's Readings" series, offering my rants and thoughts based on findings from around the world-wide web, including A11Y, AI, CSS, CSV, Debugging, DevTools, JS, NoLoJS, Performance, Progressive Enhancement, RWD, UI, UX, WP and more. Happy reading!
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Aaron T. Grogg @aarontgrogg.com · 05/02/2026
If ever anyone on the web *didn’t* need a recommendation… 🤩
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Aaron T. Grogg @aarontgrogg.com · 05/02/2026
This is great! Wonder how various RUM tools will integrate this…
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Aaron T. Grogg @aarontgrogg.com · 04/02/2026
Introducing NoLoJS: an open-source design library of components that reduce reliance on JS, where possible, in favor of HTML and CSS.
aarontgrogg.com
NoLoJS: Reducing the JS Workload with HTML and CSS
Introducing NoLoJS: an open-source design library of components that reduce reliance on JS, where possible, in favor of HTML and CSS.
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Aaron T. Grogg @aarontgrogg.com · 04/02/2026
Just another day in Trumplandia…
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Aaron T. Grogg @aarontgrogg.com · 03/02/2026
Had a chance to write a guest post for DebugBear all about the JPEG XL (JXL) image format. Would love to hear your thoughts on it!
aarontgrogg.com
What is JPEG XL and do we really need another image format?
Had a chance to write a guest post for DebugBear all about the JPEG XL (JXL) image format. Would love to hear your thoughts on it!
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Aaron T. Grogg @aarontgrogg.com · 26/01/2026
If you or someone you know needs help with website performance optimizing, please feel free to reach out!
aarontgrogg.com
Hanging my web performance optimization shingle
If you or someone you know needs help with website performance optimizing, please feel free to reach out!
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CSS Weekly @cssweekly.com · 24/01/2026
Did you know that you can easily debug starting-style CSS at-rules in Chrome DevTools? 🏁 In the Elements Panel, find the element where the starting-style is applied, then click on the (starting-style) label to show the values in DevTools. 🔥 Have you already used the Starting Style at-rule?
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Aaron T. Grogg @aarontgrogg.com · 24/01/2026
Would that they had, would that they had…
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