Tessera

Automated formatting of code is possible & encouraged, but automation always has unintended consequences. Learning to format is a low effort to learning order & taste. Reasoning requires order. Scalafmt or AI won't fix the disorder of your code or your mind or your poor taste.

"On Performance, GCs and Rust" Consider this claim: Rust programs have better performance than Java/Go/.NET programs. Do you agree with it? #Programming #Languages #Java #JVM #Rust alexn.org/blog/2026/0...

On Performance, GCs and Rust

On programming and personal projects

alexn.org

On Performance, GCs and Rust

On programming and personal projects

alexn.org

In a free market, motivation doesn't matter, only the price does. And the only thing that can threaten competition & commodification of #AI is state regulation. Reject the FUD related to open-weights LLMs by Chinese companies. You only need trust for proprietary services.

Argentina's performance was spectacular. Others get demotivated when conceding a goal, yet their motivation only grew. I'm rooting for Spain next, they are more technical, but it's going to be hard to win against such strong motivation, a force of nature. #worldcup #football

I've never seen an engineer "attempt" to override $HOME and then delete it. What a silly thing to do. "The Daily WTF" notwithstanding, meat-space having stories of blunders, I've never worked with engineers that get this silly. But hey, at least this is fast & cheap 😏

Tweet by Tibo saying:

"On file deletions. We’ve investigated a handful of reports where GPT-5.6 unexpectedly deleted files.

What we have found is that this most commonly occurs when:
- Full access mode is enabled and codex is run without sandboxing protections, including without auto review being enabled
- The model attempts to override the $HOME env var to define a temporary directory.
- The model makes an honest mistake and mistakenly deletes $HOME instead."

I have a Macbook Pro 2019 with an Intel processor. Given the forced obsoletion after macOS Tahoe, I deleted macOS from it. Installing Linux would be difficult due to T2 chip, so I went for Windows 11 and ... it's not bad. WSL is decent, and 32-bits games still work 🤷‍♂️

We are already living in a science-fiction scenario. It may be hard to see, but it can go both ways from here: dystopia or incredible abundance, and it's coming fast, like in the next couple of years.

It’s not just “X.” It’s “Y.” ✨ Here’s the thing: some writing patterns are undeniable AI indicators. Either that, or you’re secretly one of the great classical writers. Although they probably didn’t use emojis 😉 And once people see it, they can’t unsee it 🙈💩

∃ugene -Yokota 🥙@eed3si9n.com · 3w ago

I've never heard of any "top" dev that doesn't care deeply about code & craftsmanship, writing more & better code than other people; w/ every other skill a consequence. The idea that coding ability hasn't been what makes devs "top" is ... wrong, told by people that can't code.

released sbt 2.0.2, featuring - metabuild resolution fix - build pipelining fix - remote cache timeout fix - sbtn stdout replaying fix, and more eed3si9n.com/sbt-2.0.2 #Scala

sbt 2.0.2 · eed3si9n

eed3si9n.com

My #OpenCode configuration (GitHub repo); work in progress, and it's not much, but you need surprisingly little: github.com/alexandru/... Custom Linux container for running OpenCode (GitHub repo): github.com/alexandru/... #AI #LLM #OpenCode

Alexandru Nedelcu @alexn.org · 4w ago

GPT-5.6 Sol/Terra/Luna are good models. 💡 For personal projects, the $20 ChatGPT subscription has a lot of mileage if you delegate grunt work to DeepSeek v4 Pro/Flash, whose official API pricing is dirt cheap. You'll need open-source harnesses for that (e.g., #OpenCode).

You can laugh at attempts to rewrite the world in #Rust, but it's getting real 😃 The examples of big rewrites to a different tech stack that couldn't have happened without #AI keep pilling up. github.com/malisper/p...

GitHub - malisper/pgrust: Postgres rewritten in Rust, now passing 100% of the Postgres regression tests

Postgres rewritten in Rust, now passing 100% of the Postgres regression tests - malisper/pgrust

github.com

Alexandru Nedelcu @alexn.org · 4w ago

I'm a non-native English speaker, so I understand using #AI to correct your writing, although I don't do it, as AI corrections makes text bland and boring. It has a moderating effect on people's opinions, and this can be good if you're an asshole, but otherwise AI slop sucks.

Alexandru Nedelcu @alexn.org · 4w ago

Bun rewrite in Rust took 11 days, prerelease Fable and $165000 in tokens, on a codebase w/ 500k+ loc. Impressive. And price tag is low vs hiring couple of devs for a year ($1 million?). This is what convergence to zero looks like. bun.com/blog/bun-in-rust

Rewriting Bun in Rust | Bun Blog

Why & how we rewrote Bun from Zig to Rust

bun.com

The advent of #AI is giving more reasons to teenagers to avoid learning stuff b/c "it's not useful in the real world". Learning is always hard, and not natural for anything that doesn't have to do w/ immediate needs & desires. So people always look for reasons to avoid learning.

Sakib @sake92.bsky.social · last mo.

"Can you write assembly?" Yes I can, I was writing 80286 assembly în high-school, for fun, and I learn RISC-V în colege. I also know some JVM bytecode. I wouldn't be very productive in assembly, but some knowledge is still valuable, plus it's beside de point...

Introducing shiny new build tool for Scala/Java. :) Appreciate if you try it and give honest feedback! blog.sake.ba/en/programmi... #scala #java

Introducing Deder Build Tool | blog.sake.ba

Deder build tool, Pkl, Scala, Java, Sbt, Mill, Maven, Gradle, BSP, build server protocol, OTEL, web dashboard, TUI, Zinc, client-server, native-image

blog.sake.ba

Anthropic and OpenAI would love nothing more than for #AI to get regulated in the name of safety, to regulate open-weights LLMs out of existence. All their concerns are fake. There's no such thing as a natural monopoly in a liberal market, all monopolies are government-granted.

Simon Vergauwen @vergauwensimon.bsky.social · last mo.

In #Java land, Logback, one of the most foundational libraries, removes support for certain configs with a patch version, so upgrading this library (as demanded by scanners like Checkmarx), can break your logs. The SEMVER is strong with this one 🥲

Kotlin 2.4.0 context parameters are a game-changer for FP! 🚀 Type constraints (Transaction) enforced by the compiler Elegant errors via Arrow-kt, and soon rich errors Structured concurrency with Coroutines Clean, capability-based architecture without the boilerplate. #Kotlin #FP

Small example of Kotlin Context Parameters showing how to combine Exposed' Transaction, Arrow-kt Raise, and suspend into a powerful standalone pure function that is constraints by all the contexts it needs.

We are doomed!

Meme image showing a couple lying in bed. On the left, a woman looks annoyed with the caption: "He's an expert; he must be frustrated that he doesn't get a seat at the decision-making table." On the right, a man faces away from her looking content with the caption: "Functional programming is so cool!"

In #Rust I don't like seeing tests in the same file as the code, and I don't understand why people think that's a good idea. Test code is not production code and does not have the same maintainability requirements. Most tests are made of crappy code that does the job.

Internet needs more #cats