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Postgres LISTEN/NOTIFY does not scale

https://www.recall.ai/blog/postgres-listen-notify-does-not-scale
291•davidgu•3d ago•109 comments

Show HN: Pangolin – Open source alternative to Cloudflare Tunnels

https://github.com/fosrl/pangolin
26•miloschwartz•4h ago•3 comments

Show HN: Open source alternative to Perplexity Comet

https://www.browseros.com/
156•felarof•8h ago•52 comments

What is Realtalk’s relationship to AI? (2024)

https://dynamicland.org/2024/FAQ/#What_is_Realtalks_relationship_to_AI
231•prathyvsh•11h ago•78 comments

Batch Mode in the Gemini API: Process More for Less

https://developers.googleblog.com/en/scale-your-ai-workloads-batch-mode-gemini-api/
21•xnx•3d ago•4 comments

FOKS: Federated Open Key Service

https://foks.pub/
176•ubj•13h ago•42 comments

Graphical Linear Algebra

https://graphicallinearalgebra.net/
179•hyperbrainer•10h ago•12 comments

Flix – A powerful effect-oriented programming language

https://flix.dev/
216•freilanzer•12h ago•88 comments

Measuring the impact of AI on experienced open-source developer productivity

https://metr.org/blog/2025-07-10-early-2025-ai-experienced-os-dev-study/
514•dheerajvs•9h ago•325 comments

Belkin ending support for older Wemo products

https://www.belkin.com/support-article/?articleNum=335419
53•apparent•7h ago•47 comments

Red Hat Technical Writing Style Guide

https://stylepedia.net/style/
159•jumpocelot•11h ago•71 comments

Yamlfmt: An extensible command line tool or library to format YAML files

https://github.com/google/yamlfmt
24•zdw•3d ago•12 comments

Launch HN: Leaping (YC W25) – Self-Improving Voice AI

49•akyshnik•8h ago•25 comments

Turkey bans Grok over Erdoğan insults

https://www.politico.eu/article/turkey-ban-elon-musk-grok-recep-tayyip-erdogan-insult/
84•geox•2h ago•57 comments

How to prove false statements: Practical attacks on Fiat-Shamir

https://www.quantamagazine.org/computer-scientists-figure-out-how-to-prove-lies-20250709/
198•nsoonhui•16h ago•153 comments

Regarding Prollyferation: Followup to "People Keep Inventing Prolly Trees"

https://www.dolthub.com/blog/2025-07-03-regarding-prollyferation/
40•ingve•3d ago•1 comments

Show HN: Cactus – Ollama for Smartphones

107•HenryNdubuaku•7h ago•45 comments

eBPF: Connecting with Container Runtimes

https://h0x0er.github.io/blog/2025/06/29/ebpf-connecting-with-container-runtimes/
34•forxtrot•7h ago•0 comments

Grok 4

https://simonwillison.net/2025/Jul/10/grok-4/
178•coloneltcb•6h ago•148 comments

Analyzing database trends through 1.8M Hacker News headlines

https://camelai.com/blog/hn-database-hype/
116•vercantez•2d ago•61 comments

Not So Fast: AI Coding Tools Can Reduce Productivity

https://secondthoughts.ai/p/ai-coding-slowdown
54•gk1•2h ago•32 comments

Diffsitter – A Tree-sitter based AST difftool to get meaningful semantic diffs

https://github.com/afnanenayet/diffsitter
89•mihau•13h ago•26 comments

Matt Trout has died

https://www.shadowcat.co.uk/2025/07/09/ripples-they-cause-in-the-world/
139•todsacerdoti•19h ago•41 comments

Is Gemini 2.5 good at bounding boxes?

https://simedw.com/2025/07/10/gemini-bounding-boxes/
259•simedw•13h ago•58 comments

The ChompSaw: A Benchtop Power Tool That's Safe for Kids to Use

https://www.core77.com/posts/137602/The-ChompSaw-A-Benchtop-Power-Tool-Thats-Safe-for-Kids-to-Use
80•surprisetalk•3d ago•64 comments

Foundations of Search: A Perspective from Computer Science (2012) [pdf]

https://staffwww.dcs.shef.ac.uk/people/J.Marshall/publications/SFR09_16%20Marshall%20&%20Neumann_PP.pdf
4•mooreds•3d ago•0 comments

Show HN: Typeform was too expensive so I built my own forms

https://www.ikiform.com/
166•preetsuthar17•17h ago•86 comments

Final report on Alaska Airlines Flight 1282 in-flight exit door plug separation

https://www.ntsb.gov:443/investigations/Pages/DCA24MA063.aspx
130•starkparker•5h ago•141 comments

Radiocarbon dating reveals Rapa Nui not as isolated as previously thought

https://phys.org/news/2025-06-radiocarbon-dating-reveals-rapa-nui.html
17•pseudolus•3d ago•8 comments

Optimizing a Math Expression Parser in Rust

https://rpallas.xyz/math-parser/
127•serial_dev•17h ago•55 comments
Open in hackernews

Bitchat - P2P Chat on Bluetooth (no Internet, phone number, etc.)

https://github.com/permissionlesstech/bitchat
22•fitzn•8h ago

Comments

AgentK20•6h ago
Previous discussion: https://news.ycombinator.com/item?id=44485342
JonnyReads•6h ago
I don't get the hype around this. No one would be talking about it if it was released by someone who wasn't a billionaire
baobun•6h ago
Care for some more constructive criticism?
jahsome•5h ago
I'll ask more directly: What's the use case and/or value proposition for the average person?

I've heard about it a few times over the last 24 hours, and I'm relatively off social media, so that to me indicates a considerable buzz. But the only thing that gets headlines is "Jack did a thing!" And the readme is primarily jargon.

I can't speak for GP, but it's not clear to me _why_ it's a Really Big Deal.

theultdev•5h ago
Bluetooth mesh chats were quite popular and effective during the Hong Kong protests.

Aside from protests, I'd also say they could be useful during festivals and other events where mobile networks can get quite congested.

Eventually fragments of groups will pass within range, forwarding messages to the rest, useful for coordinating rendezvous.

If built into an app for the event, it would be even more effective.

jahsome•5h ago
Thanks, that's helpful context!
theultdev•5h ago
A side note, airtags + iphones are effectively the largest bluetooth mesh network in the world, and they are quite useful even though only coordinates are sent.
jahsome•5h ago
Do you mean useful in general or useful in this specific application?

If the goal is transmitting a message how do coordinates from a "read-only" device facilitate a p2p transfer?

theultdev•5h ago
I meant useful in general. It's slightly off topic, but I think many people overlook the fact they are just a bluetooth mesh network as well.

Imagine one just as large as the airtag + iphone ecosystem but with messaging capabilities!

Would be cool to see one built into android + iphones but that will never happen. But a 3rd party could get so popular that it achieves somewhat close to that.

I'd imagine remote villages and towns could all install this and communicate with each community member very effectively.

jahsome•5h ago
Ah! I see the connection of your points. Thanks so much for your thoughtful responses.
baobun•5h ago
> What's the use case and/or value proposition for the average person?

Weird take. If it doesn't make sense to you, maybe it's just not for you (yet). That's not an indictment of either you, the project, or other people being excited about it. Not everything has to be targeting the lowest common denominator on launch.

Who even is "The Average Person"?

jahsome•5h ago
How is trying to better understand what I'm missing a "weird take"?

Edit: feel free to answer if you're so inclined, but after seeing your edits, I have no desire to engage with you further; You win!

bravoetch•5h ago
For the average person, probably not much use. But we're in an interesting time where laptops and phones are ubiquitous and all of them have bluetooth. It being open source, and already ported to Android, is a bit special too. Seems like a coinflip whether it catches on, and if people start using it for concerts, festivals, group camps or whatever, then in a disaster it will already be there for people.
jahsome•5h ago
I feel like it probably has particilar applications, especially if seamlessly integrated, but I also can't but help feeling like there's a certain level of "protocol fatigue" for non-tech folks.

In my experience a lot of people dont really understand the distinction between WiFi and Cellular for example. Or maybe more relevant, SMS vs MMS vs RCS.

That's not to say it can't or won't work, but rather the tech is interesting but I imagine a lot of potential friction for early adopters, which seems (to my limited understanding) self defeating as it only works if there's a critical mass of users.

JonnyReads•5h ago
Maybe I'm being overly critical. But it's nothing revolutionary or new, we've had Bluetooth mesh chat for a long time. In fact I vaguely remember seeing it as someone's a university masters project over 10 years ago. I'm more interested in the lo-ra mesh, but that's probably because it feels more mysterious to me, as I have little understanding of radio networks. Let's not even get started on the name (b*tch@).

But I must admit it is cool that it's open source. I'll keep a eye out for an android app

theultdev•5h ago
Nothing revolutionary but I haven't seen one with this many features.

Store and forward, E2EE, message compression, battery optimization, groups, permissions, etc.

It's pretty feature packed tbh. I think that's where the news is.

bravoetch•5h ago
Someone ported it to Android already. https://github.com/permissionlesstech/bitchat-android/releas...
BLKNSLVR•5h ago
Whilst there are alternatives, one being Briar and there are others whose names I can't recall, it's not a flooded market, so I think it's worth some discussion.

Additionally, tools that allow communication and coordination without relying on internet or cloud-based services seem to be of increasing pertinence to the direction the world is currently going.

Re hype: that's just human reaction to any well known person's new thing. Just don't get caught up in it, discuss "thing" for "things" sake and move on.

ryanisnan•5h ago
This is super neat! I love tech that expands beyond the internet. I have a strong feeling that this kind of technology plays a very important, but limited job in our future.
jcon321•5h ago
What's the usecase for this? Texting your classmates right next to you when wifi is down and you didnt pay your phone bill? It requires peers to be running bitchat. So is this only going to be useful if everyone has bitchat installed?
theultdev•5h ago
- hiking

- protests

- festivals / events

- remote communities

details are in other comments in this thread.