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NIST scientists create 'any wavelength' lasers

https://www.nist.gov/news-events/news/2026/04/any-color-you-nist-scientists-create-any-wavelength...
215•rbanffy•7h ago•90 comments

Anonymous request-token comparisons from Opus 4.6 and Opus 4.7

https://tokens.billchambers.me/leaderboard
457•anabranch•12h ago•463 comments

Updating Gun Rocket through 10 years of Unity Engine

https://jackpritz.com/blog/updating-gun-rocket-through-10-years-of-unity-engine
40•tyleo•2d ago•9 comments

College instructor turns to typewriters to curb AI-written work

https://sentinelcolorado.com/uncategorized/a-college-instructor-turns-to-typewriters-to-curb-ai-w...
180•gnabgib•9h ago•173 comments

The electromechanical angle computer inside the B-52 bomber's star tracker

https://www.righto.com/2026/04/B-52-star-tracker-angle-computer.html
295•NelsonMinar•11h ago•84 comments

Why Japan has such good railways

https://worksinprogress.co/issue/why-japan-has-such-good-railways/
337•RickJWagner•15h ago•335 comments

Zero-Copy GPU Inference from WebAssembly on Apple Silicon

https://abacusnoir.com/2026/04/18/zero-copy-gpu-inference-from-webassembly-on-apple-silicon/
45•agambrahma•5h ago•16 comments

Optimizing Ruby Path Methods

https://byroot.github.io/ruby/performance/2026/04/18/faster-paths.html
66•weaksauce•7h ago•23 comments

Modern Common Lisp with FSet

https://fset.common-lisp.dev/Modern-CL/Top_html/index.html
105•larve•3d ago•11 comments

State of Kdenlive

https://kdenlive.org/news/2026/state-2026/
351•f_r_d•16h ago•116 comments

Dizzying Spiral Staircase with Single Guardrail Once Led to Top of Eiffel Tower

https://www.smithsonianmag.com/smart-news/a-dizzying-spiral-staircase-with-a-single-guardrail-onc...
8•bookofjoe•2d ago•1 comments

Migrating from DigitalOcean to Hetzner

https://isayeter.com/posts/digitalocean-to-hetzner-migration/
705•yusufusta•14h ago•367 comments

Thoughts and feelings around Claude Design

https://samhenri.gold/blog/20260418-claude-design/
258•cdrnsf•8h ago•170 comments

Metatextual Literacy

https://www.jenn.site/metatextual-literacy/
5•dado3212•3d ago•0 comments

NASA Shuts Off Instrument on Voyager 1 to Keep Spacecraft Operating

https://science.nasa.gov/blogs/voyager/2026/04/17/nasa-shuts-off-instrument-on-voyager-1-to-keep-...
97•sohkamyung•4h ago•40 comments

Sumida Aquarium Posts 2026 Penguin Relationship Chart, with Drama and Breakups

https://www.sumida-aquarium.com/special/sokanzu/en/2026/
181•Lwrless•3d ago•5 comments

My first impressions on ROCm and Strix Halo

https://blog.marcoinacio.com/posts/my-first-impressions-rocm-strix-halo/
27•random_•6h ago•9 comments

Show HN: MDV – a Markdown superset for docs, dashboards, and slides with data

https://github.com/drasimwagan/mdv
100•drasim•12h ago•36 comments

Dad brains: How fatherhood rewires the male mind

https://www.bbc.com/future/article/20260417-fatherhood-how-the-male-brain-and-body-prepare-for-ch...
109•tchalla•5h ago•63 comments

PgQue: Zero-Bloat Postgres Queue

https://github.com/NikolayS/pgque
96•gmcabrita•11h ago•15 comments

Scientists discover “cleaner ants” that groom giant ants in Arizona desert

https://www.sciencedaily.com/releases/2026/04/260414075641.htm
87•t-3•3d ago•31 comments

I dug into the Postgres sources to write my own WAL receiver

https://medium.com/@mailbox.sq7/a-long-story-about-how-i-dug-into-the-postgresql-source-code-to-w...
30•alzhi7•1d ago•2 comments

Floating Point Fun on Cortex-M Processors

https://danielmangum.com/posts/floating-point-cortex-m/
45•hasheddan•1d ago•3 comments

Amiga Graphics Archive

https://amiga.lychesis.net/
241•sph•21h ago•77 comments

80386 Memory Pipeline

https://nand2mario.github.io/posts/2026/80386_memory_pipeline/
94•wicket•4d ago•13 comments

Understanding the FFT Algorithm (2013)

https://jakevdp.github.io/blog/2013/08/28/understanding-the-fft/
69•peter_d_sherman•4d ago•6 comments

UpCodes (YC S17) is hiring SDRs to help make construction more productive

https://up.codes/careers?utm_source=HN
1•Old_Thrashbarg•11h ago

Show HN: SmallDocs – Markdown without the frustrations

65•FailMore•3d ago•28 comments

Category Theory Illustrated – Orders

https://abuseofnotation.github.io/category-theory-illustrated/04_order/
236•boris_m•21h ago•60 comments

Fuzix OS

https://www.fuzix.org/
83•DeathArrow•12h ago•23 comments
Open in hackernews

Fixrleak: Fixing Java Resource Leaks with GenAI

https://www.uber.com/blog/fixrleak-fixing-java-resource-leaks-with-genai/
17•carimura•11mo ago

Comments

stevoski•11mo ago
> “Resource leaks, where resources like files, database connections, or streams aren’t properly released after use, are a persistent issue in Java applications”

This was true maybe back in 2005. Java has had try-with-resources for a loooong time. As I see it this has been the dominant idiom for ages, for handling resources that might leak.

okr•11mo ago
People tend to forget. Stream-API is a good candidate, that people like to not consider for leakage. If you don't own your stream, if you do not definitly know, that your stream comes from a collection, then ya better close it with a try-block.
bob778•11mo ago
How much effort was spent automating this to fix 112 instances across Uber’s code base? I assume code reviews would catch any new issues so this seems like overkill for a small one-off task?
hawk_•11mo ago
Spotbugs or checkstyle etc... would catch these. What does AI add here?
xyst•11mo ago
It gives marketing team at Uber to say "wE uSe AI hErE!!1". C-levels approve since anything AI gets a nice pump.

Engineering wise. This adds nothing. It’s an absolute waste of compute and energy to run this through LLMs

sigotirandolas•11mo ago
> This analysis ensures that FixrLeak skips functions where resources are passed as parameters, returned, or stored in fields, as these resources often outlive the function’s scope.

> FixrLeak delivers precise, reliable fixes while leaving more complex cases for advanced analysis at the caller level.

In other words, this will only fix trivial leaks, which are best seen as a language design issue and can be fixed by RAII, reference counting, etc.

It won't fix the more insidious leaks like `UNBOUNDED_QUEUE.add(item)` that are more likely to pass through code review in the first place.

xyst•11mo ago
Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Peak waste.

What’s next?

"Get rid of your GitHub dependabot alerts and replace it with my shitty ChatGPT wrapper”

rvz•11mo ago
> Using AI when a static scanner like SonarQube easily picks up these types of resource leaks, especially in Java.

Exactly.

It's very disappointing to see that Uber engineers would rather trust an LLM to that claims to spot these issues when a battle-tested scanner such as SonarQube would have caught this in the first place.

The LLM hype-train is almost just as bad as the JavaScript hype train in the 2010s where some of the worst technologies are used on everything.

rvz•11mo ago
Why exactly do you need LLMs for this when efficient alternatives like SonarQube or checkstyle already do this without the expensive waste LLMs create?

This adds little to no technical advantage over existing solutions what so ever for this particular use case.

yahoozoo•11mo ago
stupid af
Traubenfuchs•11mo ago
So you tell me those 200-600k software engineers that can easily solve leetcode hard are so incompetent they missed using try-with-resources at such scale, they needed to introduce new AI tooling to fix it?

Hey Uber, I am from the EU, I usually can‘t even solve leetcode medium but I will write you scalable, spotless Java for a third of the salary.

Our industry and its economics are a joke.

hello_moto•11mo ago
So you write bug-free scalable code 100% in any jobs you ever worked for?

I guess we don’t need QA and Dev/Staging environment

rad_gruchalski•11mo ago
Can the QA team? How does the dev/staging environment help writing less buggy code?
rad_gruchalski•11mo ago
But can you leetcode heh.
TYMorningCoffee•11mo ago
A lot of commenters point out that there already are many established static checkers that do this. That is not what Uber attempts here.

Uber is not proposing a static checker. They even use sonar qube in their architecture. They propose using an LLM to resolve the leak detected by sonar qube.