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Jack Franklin

@jackf.io
1.6K followers 391 following 400 posts

Googler focusing on web performance and performance tools. Find me online at jackf.io

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Jack Franklin @jackf.io · 28/09/2026
Managed to do a bios update and then CPU and cooler upgrade without breaking the motherboard or anything else and that's pretty impressive if you ask me
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Jack Franklin @jackf.io · 26/09/2026
Just read the words "only older readers will remember SASS and HAML" and I died a bit inside
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Jack Franklin @jackf.io · 23/09/2026
People who want to stop giving 1Password your money: what are you using instead? I use it as a basic vault and not much more.
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Jake Archibald @jakearchibald.com · 17/09/2026
I remember a conference after party a decade+ ago where @johnresig.com was stood in the corner on his own because everyone (including me) was too shy to speak to him. Fwiw, if you ever want to talk to me at one of these things, please just do it. I'm also shy.
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Jack Franklin @jackf.io · 13/09/2026
Yes parenting is hard but the good news is that my coping mechanism is buying too many model trains
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Jack Franklin @jackf.io · 06/09/2026
Finally deleted my Facebook account today and it feels good
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Cooper Lund @cooperlund.online · 09/06/2025
Every article about the inevitability of AGI
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Jack Franklin @jackf.io · 24/08/2026
I am a 34 year old man and tomorrow a shed is being put in my garden solely for model trains and how good is that
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Jack Franklin @jackf.io · 20/08/2026
If you want to know what parenting is like (for me at least) things got so tough yesterday that after failing to get my 2yr old to eat his pasta in a pub (meal with family), I had to walk out & have a cry in the car park. Sharing because no one talks about this stuff - especially not dads.
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Jack Franklin @jackf.io · 17/08/2026
I can't put my finger exactly on it but Opus 5 and the new GPT 5.6 are just...too smart? Constantly giving dreadful verbose, unclear output and actually far far worse at generating anything useful.
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Sinjo @sinjo.dev · 09/08/2026
Yep. If code was never the hard part, software wouldn’t be so goddamn buggy and broken. If “code” only ever meant thoughtlessly churning out the next endpoint, you missed the point entirely. blog.senko.net/code-was-nev...
blog.senko.net
"Code was never the hard part" is an insult to all programmers
The software development profession is in the midst of upheaval. Nobody knows how the AI revolution will play out in the end, but it is c...
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jordan @jdan.me · 08/08/2026
notes.jordanscales.com/coffee
notes.jordanscales.com
I recently sat down for coffee with one of my oldest friends in the industry.
I recently sat down for coffee with one of my oldest friends in the industry. “How’s everything going?” I asked, “Crazy times right?” “We’re up to 1 million...
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Barry Pollard @tunetheweb.com · 04/08/2026
Technology, like time, cannot be stopped in it's relentless march forward. Much as us old timers would like to slow down one or the other just a little bit… In light of that, Chrome 153 will come with an updated list of modern devices for emulation mode—with nice categorisation—thanks to @jackf.io
An updated list of modern devices DevTools can emulate now nicely categorised into Mobile, Foldables, Tablets & Desktops, and Smart Displays.
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Jack Franklin @jackf.io · 01/08/2026
Hamilton on West End with Lesie Odom Jr...I don't know if any musical will ever top that
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Veerender Singh Jubbal @veerenderjubbal.bsky.social · 01/08/2026
Sam Altman
@sama •7h
cool use case of chatgpt work i heard last night:
connect your family calendars and explain your kids' interests.
every morning for the drive to school, have it make a podcast that talks about one kid's soccer game that afternoon, one kid's upcoming birthday, some news, etc.
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What if you just talked to your children
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Jack Franklin @jackf.io · 27/07/2026
"Grok did it no problem" what a surprise can't imagine why that is
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Joan León @nucliweb.net · 24/07/2026
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.
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Jack Franklin @jackf.io · 23/07/2026
Feels pretty good to have my phone download a 1.7gb Android update full of features I will never use
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Jack Franklin @jackf.io · 20/07/2026
Asked AI on a whim to see if it could identify any reasons my unit tests felt a bit slow and sure enough - runner.test.ts: ~9.3s cumulative → ~0.15s. - All reported test durations: ~27.9s → ~8.3s.
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Jack Franklin @jackf.io · 19/07/2026
Wayne Rooney live on the BBC saying his highlight of the half time show was the ending and then saying "it was crap" is the undoubted highlight of the entire world cup. Also he was right, wow that was bad.
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David Slack @slack2thefuture.bsky.social · 18/07/2026
Polymarket lets people bet on wildfires. Wildfires that those samepeople could easily set in order to win money on this illegal gambling site. Big Tech is organized crime.
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Jack Franklin @jackf.io · 15/07/2026
A colleague asked me if a change I sent for review was "you, or AI" and I was very happy because whilst I used AI to help me debug, plan and impl, I worked hard to make sure I understood the change deeply and got it authored exactly how I want (via prompt + manual tweaks). This is the goal, folks.
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Jack Franklin @jackf.io · 14/07/2026
This post is just...so, so, so good.
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Jack Franklin @jackf.io · 11/07/2026
Apparently Spotify ship about 2000 AI changes a day or something yet they still can't make your downloaded content appear immediately if you're on very poor signal
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Jack Franklin @jackf.io · 10/07/2026
All these products that let you run a fleet of AI agents and do 100 things at once are baffling to me; do we actually want this?! I know I can't do more than 1-2 things (with one primary focus) before the quality drops and my head can't keep up and think properly about the problem and solution.
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Greg Linden @glinden.bsky.social · 09/07/2026
Great piece, well worth reading, a teaser: "There's what modern software is actually capable of, and then there's the gargantuan pile of 'AI' hype, fraud, and bullshit ... hucksters lying to your face about the imminent arrival of omniscient, sentient, paradigm-rattling supercomputers."
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Jack Franklin @jackf.io · 09/07/2026
Can officially add "V8 contributor" to my CV now :D
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Jack Franklin @jackf.io · 06/07/2026
Best England performance of my lifetime, possibly? Wow 😳
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Lauri Donahue @lauridonahue.bsky.social · 05/07/2026
futurism.com/future-socie... lol
As one New York financier told Financial Times journalist Gillian Tett, new hires who were seen as “AI natives” are turning out to have alarmingly shallow ideas. So much so, the anonymous finance worker admitted, that his firm now actively avoids seeking out AI-literate STEM graduates, and opts to comb through humanities students instead.
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Stef Walter @stephaniewalter.bsky.social · 02/07/2026
Less is more, more or less. AI makes it easier than ever to add more, and faster. It’s tempting. But we might end up building things that don’t need to be built quantity over quality. Clarity will be hard to achieve. It doesn’t happen by accident.
jakub.kr
Less is more, more or less
In the age of AI, knowing what not to build might be the most important skill of all.
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Jack Franklin @jackf.io · 29/06/2026
Today's episode of Jack being proud of himself for conforming to an ultimately harmful stereotype of "being a man": I jump started a car for the first time! 😂
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Jack Franklin @jackf.io · 29/06/2026
Posted this on a Sunday evening, so mentioning this again for those of you who had better things to do on a Sunday night than read this :D
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Jack Franklin @jackf.io · 28/06/2026
Blogged about AI, loop engineering, token cost and motivation when giving AI advice. AI loops: who pays for the tokens? www.jackfranklin.co.uk/blog/who-pay...
jackfranklin.co.uk
AI loops: who pays for the tokens?
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Bruce Lawson @brucel.bsky.social · 26/06/2026
The company that used the books I co-wrote to train its model without permission is weeping that China "brazenly" and "illicitly" extracted its Claude AI model's capabilities. I'm sending snorts and stares. www.bbc.co.uk/news/article...
bbc.co.uk
Anthropic accuses Chinese rival Alibaba of illicitly extracting AI capabilities
The firm alleged that Alibaba used fraudulent accounts to access data from its Claude AI model.
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Jack Franklin @jackf.io · 26/06/2026
I have to collect samples of my dog's poo for the vets and I think my life has officially peaked (The dog is fine, they are trying to double check something but no stress or concern!)
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Jack Franklin @jackf.io · 25/06/2026
Huge +1. I spoke about this at a conference last week; be aware of folks who don't pay for tokens (like me in my day job, but I pay for my personal Claude usage!) telling you how great huge, multi hour loops are.
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Jack Franklin @jackf.io · 22/06/2026
Signal boosting as this starts next week! Tell me what DevTools bugs the team should fix
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Jack Franklin @jackf.io · 20/06/2026
This is me! We're focusing on a few areas next month and I'm leading the "Paper cuts" area. So spam me with your bugs, please - and please file them yourselves first so I can triage them internally 😁
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Henry Mance @henrymance.ft.com · 19/06/2026
This is an embarrassing image for the UK. A self-respecting British fox should be dragging Binface's contents out over the stage
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Jack Franklin @jackf.io · 13/06/2026
Such a good article, more like this please correresmidestino.com/dont-you-jus...
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Jack Franklin @jackf.io · 08/06/2026
Blogged! I wrote an ai-review skill & tool to let me review AI plans in the browser. I prefer working in the terminal but much prefer reviewing in a PR-style review UI. So I built it! www.jackfranklin.co.uk/blog/ai-revi...
jackfranklin.co.uk
ai-review: reviewing AI code before it lands
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Jack Franklin @jackf.io · 17/05/2026
LHR>SFO ✈️ for my first Google I/O! 🎉
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Alex Andreou @sturdyalex.bsky.social · 16/05/2026
Sneaking a giant screen into the flagshagger march is one of the funniest things @ledbydonkeys.org have ever done. "STAY HYDRATED" 😂🤣😂
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Jack Franklin @jackf.io · 24/04/2026
Wrote a blog post about using Claude to track feedback and building a small skill and CLI to avoid huge inefficient markdown files: www.jackfranklin.co.uk/blog/claude-...
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Jack Franklin @jackf.io · 24/04/2026
Wrote a blog post about using Claude to track feedback and building a small skill and CLI to avoid huge inefficient markdown files: www.jackfranklin.co.uk/blog/claude-...
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Jack Franklin @jackf.io · 26/03/2026
Excited to head up north for Developers Up North conf in June this year :) www.developersupnorth.co.uk
developersupnorth.co.uk
Developers Up North Conference
A conference for developers in Northern regions of England.
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Jack Franklin @jackf.io · 31/01/2026
A good week ⛷️
A view showing snowy mountains in the French Alps
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Bramus @bram.us · 16/01/2026
Vertical Tabs are available behind a flag in Chrome 145 (current beta) 1. Go to `chrome://flags/#vertical-tabs` 2. Set it to enabled 3. Relaunch Chrome 4. Right click the tabbar and choose “Move Tabs To The Side” Attached are before and after screenshots.
Chrome 145 with the flag enabled and showing the context menu to move the tabs to the sideChrome 145 with the tabs shown to the side (vertical tabs)
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Jack Franklin @jackf.io · 21/12/2025
This is an incredible post and I learned a lot. Side-note: @samwho.dev's blog posts and visual explanations continue to amaze me!
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Sarah O'Connor @sarahoconnorft.ft.com · 16/12/2025
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