If China's emissions had kept growing at previous levels emissions would like, what, maybe a full GIGATONNE higher....the area of avoided emissions here is like deleting the emissions of entire countries. This is happening at a scale that will very clearly have an effect in lessening disasters

The Java Track at Devoxx UK is STACKED. We’re bringing the best in the business to London to talk about the future of the JVM. From JDK 26 internals to AI and microsecond latency, here’s what’s landing:

Security vs DevEx? False choice. @abangser.bsky.social, Adrian Mouat & @hollycummins.com explore how teams can build systems that are both secure and great to work on. youtu.be/EGSMP2UodKM?...

Say hello to the Mind the Geek Track, where creativity meets engineering. Quarkus madness with @hollycummins.com 😆 A DIY robot arm by @iuliaferoli.com JVM emulation with Remco Siemonsma Led by @kayaweers.bsky.social Watch the full lineup at amsterdam.voxxeddays.com And get your ticket.

Mocking is a useful tool, but it has risks. I've just spent an hour staring at some code, wondering how it could fail in real life when all the tests passed beautifully. (You all know what the answer is going to be, don't you? 😅 ) Yep, I'd baked an unvalidated assumption into a mock. 🤦

Groundhog Day Meaning xkcd.com/3202/

. @hollycummins.com talks with @xstefank.bsky.social & Jan Martiška about "@quarkus.io in Action" ": why they wrote it, what surprised them, and JVM vs native compilation advice. 🎧 gotopia.tech/podcast

To misquote Gremlins "the most important rule, the rule you can never forget, never read the comments."

I made a terrible mistake and read the comments.

At 6pm tonight (UK time), I'll be doing lots of silly Quarkus demos at the JChampions conference: www.youtube.com/watch?v=hdca...

Check out our latest Foojay Podcast #89! @frankdelporte.be talks with @hollycummins.com and Michal Maléř about Quarkus and Agentic Commerce. YouTube video, podcast links, and more info on: foojay.io/today/foojay... #Quarkus #AgenticCommerce #Podcast

On today's Quarkus Insights, Michele Dolfi talked about how bad OCR led to the nonsense phrase "vegetative electron microscopy" becoming embedded in scientific literature. Now no one knows how to get it out: www.sciencealert.com/a-strange-ph...

This picture perfectly captures my experience of writing a talk. Every time.

Check out "Non-deterministic? No problem! You can test it!" with Eric Deandrea & Oleg Selajev today at JChampions Conference. Friday, January 23rd at 9am EST. FREE and VIRTUAL: www.youtube.com/watch?v=hHAL... (1/2)

I use "McNamara Fallacy", but mathwashing conveys the point, better, without readers needing to go look up what the McNamara fallacy is. (Plus the McNamara fallacy is technically more about being misled into measuring what's easy to measure, rather than "numbers give the illusion of competence".)

Currently working with my feet on my desk like the villain in an eighties movie. These are the benefits of working at home that no one talks about.

Come for the discussion of LLMs in academia, stay for the EPIC pictures of people doing exams in fancy dress.

Have any of you seen laser-marked fruit in the grocery store? Trying to get a rough idea of how widespread it is. www.electrooptics.com/news/europea...

The 2026 JChampions Conference begins on Thursday at 9:00 AM EST. You only need visit jchampionsconf.com/schedule.html for the link to each session to watch it live or anytime afterwards till the end of time.

Just a reminder, the Quarkus Community Call happening tomorrow (January 20th at 2pm Paris time). This week's topic: Office Hours - Ask Us Anything! Join via Google meet: meet.google.com/jka-uhzd-fby

ICYMI: You're probably ignoring the best parts of Quarkus. I compiled 10 "Hidden Gems" that I use in almost every project: - @Location for easy HTTP headers - Zero-config Flyway - The unspoken power of Qute type-safety Stop writing boilerplate. buff.ly/aPmLiHC #Java #Quarkus #DeveloperExperience

We host a Quarkus Community Call on the first and third Tuesday of each month at 2PM (Paris time) to discuss technical topics and project updates. View the call calendar for details: calendar.google.com/calendar/emb...

Guys, it's getting real! Our CFP is open until midnight on Friday 9th Jan so don't delay - send us your proposals asap (make sure you hit that submit button, don't leave it in drafts!) Submit here ➡️ devoxxuk26.cfp.dev It's happening. 6&7 May | London See you on the stage 🤙

I love espressos, but sometimes I do wish they lasted a little longer. Yes, I know the clue is in the name. There's a lesson here in how a design can be perfectly optimised for the stated user requirements and yet not satisfy the user's actual hopes.

This is your 1 week reminder that the CFP closes Jan 9th Take some time this week to finish your abstracts, save your drafts and - very importantly - press submit! Good luck! 🗓️ 6th & 7th May ℹ️ devoxx.co.uk

"There were inherent trade-offs between human development and environmental degradation. The question is whether we can break this. I think we can." @hannahritchie.bsky.social on beating the trade-off and finding the green double win: www.sustainabilitybynumbers.com/p/sustainabl...

I built a full Quarkus Actuator-style extension from scratch and documented the entire process. - Extension generator - Build-time processing - Runtime beans - Git + build metadata - Custom /actuator/info endpoint buff.ly/CyYPGlM #Java #Quarkus #DevTools #Observability #LLMReadyJava

I love these kinds of "here are the decisions we made that maybe weren't ideal, with the benefit of four years of hindsight" kinds of talks. (I already know this one is good, because I saw it at Devoxx.)

My Øredev talk is live: www.youtube.com/watch?v=4rbw...

Thank you to @charity.wtf and Martin for the lovely sticker delivery – my laptop has now been thoroughly @honeycomb.io-ised. It is now much pinker 🦄 and rainbow-ier 🌈 and contains lots of wisdom about how to deliver software 💖.

Serverless has been top of mind this week. - @bjschrijver.dev did a super Quarkus Insights about the JFall app and serverless: www.youtube.com/live/iuvLkNl... - We're considering writing a blog about serverless performance surprises ...and, of course, naming: hollycummins.com/naming-serve...

The @jnationconf.bsky.social CFP is open now. I can enthusiastically recommend the conference t-shirts (I wore mine last week). As a female speaker, I do not say this often. :) sessionize.com/jnation-2026

The late Jared Richardson said something similar regarding inheritance of a legacy codebase: hit it with a bat Build Automate Test If it hurts, do it more often til it doesn‘t. And no, it doesn‘t mean getting used to the pain, rather fix it so that it stops hurting

A family conversation this morning reminded me: releasing is like brushing your teeth. If it bleeds when you do it, do it more.

This is something I have tried to teach management at every job I've had when I wrote code; I sympathize with the need for metrics but this is a hard problem to solve Now that I'm in management myself I am working hard to find meaningful metrics for my team and the value they deliver.

Are your metrics KILLING your team? @hollycummins.com & @trishagee.bsky.social bust the biggest myths of #DeveloperProductivity: lines of code & "busy-ness" destroy business value. Learn how Developer Joy & Strategic Boredom can unlock 31% higher efficiency and throughput: bit.ly/3Xyl0kA #InfoQ

I have a technique I call incompetence-based-mutation-testing. Start making some changes. Bork everything, comment out half the existing code to just make stuff compile. Run tests. Watch tests pass. Stop refactoring, go have a stern word with the tests.

My InfoQ talk with @trishagee.bsky.social is live: www.infoq.com/presentation...

Why I Think Git Flow Doesn't Fit Most Projects Anymore blog.sunix.org/articles/how...

Includes "Minecraft as an Observability Client" #JustSaying

One last piece of seasonal tech content: hollycummins.com/vampires-and... Why vampires and zombies are skulking in your codebase.

Sometimes, death is a feature, not a defect. hollycummins.com/death-and-so...

I don't know how to explain this coincidence if my computer doesn't have (a) self-awareness and (b) a malevolent sense of humour.

Change of plans - Quarkus is one hour *earlier* for the EU folks. :)

This reminds me about a walking route from Germany to NYC, USA I tried for fun some years ago. But back then Google listed „swim xxxx kilometers through the Atlantic ocean“ which surprised me in a positive way (that it recognized swimming).

Great talk by @hollycummins.com at Lindholmen developer day. As a data person and as someone who used to work with healthcare this resonated a lot: "don't make human tell computer things the computer already knows". It is so key but so often neglected in practice (&definitely a thief of joy) #databs

This looks more like a swimming route than a walking route, Google.

... and apparently our streaming provider uses AWS. :) So no Quarkus Insights today. Sorry, everyone!

Big hugs to everyone whose status page origin server is hosted on AWS and just pushes updates to a CDN cache.