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HackerTube: YouTube built from videos recommended by HN

https://karpathy.bearblog.dev/hacker-tube/
1645β€’karpathyβ€’19h agoβ€’434 comments

Proving and Improving the Platonic Representation Hypothesis with JEPAs

https://arxiv.org/abs/2610.39302
34β€’Anon84β€’2h agoβ€’5 comments

Novellas with Groff

https://movq.de/blog/postings/2026-10-31/0/POSTING-en.html
25β€’dverlaeckt80β€’1h agoβ€’3 comments

Pi Is the Last Harness

https://destiner.io/blog/post/pi-is-the-last-harness/
11β€’Destinerβ€’57m agoβ€’3 comments

Lenovo's 'encrypted' fingerprint USB is just an unencrypted SD card in a case

https://www.reddit.com/r/technology/comments/1xl2pr3/lenovos_encrypted_fingerprint_usb_drive_is_j...
38β€’entryleveljobscβ€’50m agoβ€’11 comments

An Italian farmer found some unknown seeds in his attic and planted them

https://www.smithsonianmag.com/science-nature/italian-farmer-found-unknown-seeds-attic-with-nothi...
590β€’ecaresβ€’16h agoβ€’173 comments

One-minute frequency disturbances from synchronization in power systems

https://www.nature.com/articles/s41560-026-02144-0
30β€’croesβ€’1d agoβ€’9 comments

Show HN: I rebuilt my old canvas 3D library as a small WebGL 2 library – phoria2

https://kevs3d.co.uk/phoria2/
16β€’kevs3dβ€’1d agoβ€’0 comments

Radiation Map of the World

https://radiaverse.com/
43β€’slaterβ€’3d agoβ€’14 comments

Brazilian Court Sanctions Lawyers for Prompt Injection in Court Filing

https://jetstream.security/insights/brazilian-court-sanctions-prompt-injection-filing/
211β€’doodlesdevβ€’13h agoβ€’106 comments

Memdoor: A team of 5 Qwen3.8-27B models beats Fable 5 on LiveCodeBench Hard

https://github.com/guregodevo/memdoor/tree/main/examples/workflows/team-solve
332β€’guregodevoβ€’16h agoβ€’163 comments

Police chief unplugs Flock cameras after company ignores contract cancellation

https://www.tomshardware.com/tech-industry/big-tech/police-chief-physically-unplugs-flock-cameras...
21β€’entryleveljobscβ€’48m agoβ€’1 comments

TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8

https://atlasum.net/blog/cve-2026-98432-linux-ipv4-tcp-uaf
584β€’ogerβ€’20h agoβ€’284 comments

The Ocean 'Was the Color of Chocolate.' Mexico Declares War on Seaweed.

https://www.nytimes.com/2026/10/28/world/americas/mexico-seaweed-navy.html
35β€’bookofjoeβ€’1d agoβ€’28 comments

Domain hacks with unusual Unicode characters (2018)

https://xn--69f31l4t57c0mag4b613h.xn--7uh4898msjaso/πŸ††πŸ†ƒπŸ…΅/
32β€’n_plus_1_accβ€’4h agoβ€’25 comments

Show HN: Point your camera at a landscape to learn about its geology

https://outcrop.rocks/
65β€’headsupernovaβ€’3d agoβ€’14 comments

Restrooms along the Norwegian Scenic Routes

https://www.visitnorway.com/plan-your-trip/travel-tips-a-z/norwegian-scenic-routes/worlds-best-to...
590β€’giuliomagnificoβ€’4h agoβ€’325 comments

AI agent swarms in Minecraft fail to build civilization, drown in bureaucracy

https://www.tomshardware.com/tech-industry/artificial-intelligence/ai-agent-swarms-unleashed-in-m...
41β€’entryleveljobscβ€’1h agoβ€’9 comments

Leaking Secrets from Air-Gap Computers by Spelling Radio Signals from RAM (2024)

https://arxiv.org/abs/2409.02292
132β€’hapax_legomenaβ€’13h agoβ€’67 comments

Running a bootstrapped SaaS for 20 years with my brother

https://blog.zamzar.com/2026/10/30/20-years-766-million-files-two-chameleons/
170β€’whyleycβ€’2d agoβ€’42 comments

Understanding Email Encryption

https://www.fastmail.com/blog/email-encryption/
64β€’nmjenkinsβ€’1d agoβ€’15 comments

The AI cost of JavaScript frameworks

https://nolanlawson.com/2026/10/28/the-ai-cost-of-javascript-frameworks/
177β€’luuβ€’9h agoβ€’118 comments

Altoids Project

https://uvdn7.github.io/altoids-project/
136β€’uvdn7β€’16h agoβ€’7 comments

Zinc creep in cable spelter sockets brought down the Arecibo telescope in 2020

https://maketecheasier.com/arecibo-zinc-creep-collapse/
141β€’ohjeezβ€’1d agoβ€’44 comments

The "Moon Trees"

https://nssdc.gsfc.nasa.gov/planetary/lunar/moon_tree.html
18β€’momentmakerβ€’2h agoβ€’1 comments

A brief history of just-in-time: forty years of JIT work, from 1960–2000

https://dl.acm.org/doi/10.1145/857076.857077
54β€’gjvcβ€’3d agoβ€’1 comments

A 1580 Map Shows Why Data Visualization Is Never Neutral

https://thereader.mitpress.mit.edu/a-1580-map-shows-why-data-visualization-is-never-neutral/
68β€’the-mitrβ€’2d agoβ€’7 comments

Electrification Could Cut Global Energy Use in Half

https://fullycharged.show/podcasts/podcast-361-why-electrification-could-cut-global-energy-use-in...
173β€’toomuchtodoβ€’20h agoβ€’127 comments

It's the memory latency, stupid

https://pivotlake.io/blog/its-the-memory-latency-stupid/
228β€’ntur1337β€’20h agoβ€’75 comments

No AI, 52 min. Build all Linux Files utils in C by Hand [video]

https://www.youtube.com/watch?v=gQRmSlcTq9c
101β€’surprisetalkβ€’3d agoβ€’86 comments
Open in hackernews

Vircadia, a Bun and PostgreSQL-powered reactivity layer for games

https://vircadia.com/
12β€’kaliqtβ€’1y ago

Comments

kaliqtβ€’1y ago
We gave Vircadia a full Gen 2 overhaul (big thanks to our sponsors such as Linux Professional Institute, Deutsche Telekom, etc. for enabling this), aiming to cut down on code bloat and boost performance. The main shift is swapping out our custom backend infrastructure for a battle-tested, high-performance system like PostgreSQL with Bun wrapping and managing every end of it.

It's kind of unheard of to do this for things like game dev (preferring custom solutions), but it works and makes things way easier to manage. The shape of the data in a database affects how well it works for a use case, and that model scales well for virtually every kind of software ever, the same should apply here!

Feel free to prototype some game ideas you might have been tossing around, our priority is DX for the project as a whole to enable more developers with less resources to build bigger worlds, so please do share feedback here and/or in GH issues!

Our roadmap is for more SDKs, and cutting down on bloat where possible, with the express goal of giving devs more cycles in the day to focus on the actual gameplay instead of tooling.

porridgeraisinβ€’1y ago
Interested to know why Deutsche telekom sponsored this
nand_gateβ€’1y ago
My guess is money laundering, given that the product is pretty vapourware-y (as a game dev in a past life: Vircadia looks more like 'how a web dev thinks multiplayer games work' aka basically unusable in a serious title).
kaliqtβ€’1y ago
I think you fundamentally misunderstand the stack. Their main usage of the platform has to do with a E2E solution with avatars, audio, etc. all synced without issue. These features ship with the client and other private repositories wrapping the core.

However, for usage to HN users they would be (likely) more interested in the SDK, the core, the underlying system, and how it can fit their use cases.

If you want to understand a small part of the scale of this project, you are welcome to check out:

https://github.com/vircadia/vircadia-web https://github.com/vircadia/vircadia-web-sdk https://github.com/vircadia/vircadia-native-core

kaliqtβ€’1y ago
For an E2E worlds solution, so this https://github.com/vircadia/vircadia-web and this https://github.com/vircadia/vircadia-native-core except heavily condensed so it's easier to modify/upgrade for each new bespoke use case.

Our old system, being very monolithic, while extremely performant and capable, was nearly impossible to adapt and change. So what we have now is much more dynamic but also still a work in progress, a more complete example will be published in the coming weeks.

ricardobeatβ€’1y ago
The example shows using it to update player positions. Doesn’t Postgres add significant latency considering a 16-33ms budget for state updates? How well does this scale?
andyferrisβ€’1y ago
Generally client games optimistically carry on a few frames (and sometimes much more!) ahead of the what the server has responded with as accepted.

This is because gamers require low latency to effectively play, but things can be slightly out of sync and logic can be complex, and anti cheat can be hard to implement server side only (which is why eg fortnite and valarant install fancy client side anti cheat software too).

For a friendly game of stardew valley or turn based strategy you can afford to wait for transactions to complete and causality to be enforced.

kaliqtβ€’1y ago
We CAN submit the change to the DB and not listen to the message on if it succeeded or not! The message will arrive eventually, it's just not necessary to await it, so you have options.
jasonjmcgheeβ€’1y ago
I had a similar reaction / question. Why not use KV store and get sub millisecond latency?
kaliqtβ€’1y ago
So it's a bit of tradeoffs, we may add a second DB to the compose by the time we reach v1.0, but, if we had to pick the convergence of simplicity and flexibility to start, PostgreSQL is it.

We prototyped SQLite as well. It just wasn't working in the stack like we had needed.

The idea is simple: use as few components as possible to achieve the outcome. Better to have less than more initially, because we can simply add the more and extend the API, but ripping everything out and trying to trim it down is damn near impossible, especially when the platform garners widespread usage.

The decision to do the less then more instead of more then less approach was spurred by us (the wider project) always having way too much bulk and then finding it impossible to turn the ship when we needed to (https://github.com/vircadia/vircadia-native-core).

We need to be agile to reach the milestones we have set out, hence the differed approach using off the shelf parts and only adding what we need, when we need it.

koakuma-chanβ€’1y ago
I love that you use Bun.
kaliqtβ€’1y ago
We have to cut bloat where we can if this is to work for higher up revision games, so Bun is the only answer that balances speed and simplicity (TypeScript native).
Drakimβ€’1y ago
How does the system separate between state changes that must be confirmed by backed compared to state changes that can be updated locally (by prediction) to give the user more snappy experience?
reedf1β€’1y ago
I would love to get into some game design - and something like this seems intuitive enough from my perspective as a software engineer. Forgive me if this is a naive question, but is the use case for this single-player games or multiplayer games?
kaliqtβ€’1y ago
Definitely multiplayer games, you wouldn't really need a syncing networking layer if you're doing single player as you can store state in any method you desire, something as simple as serializing JSON to the disk for example, or up to your server. But even then, a traditional setup like Supabase might be simpler to wrap your head around if you're just handing "user" data and not "player" data in a shared world.
kaliqtβ€’1y ago
Postgres finishes its updates sub-ms in a reasonably sized DB if optimized correctly. In terms of upper-scale (>1000 players in a somewhat real-world scenario), we're working out benchmarks to test that.

Postgres is not slow by any stretch of the imagination, but it depends on how the schema is setup and what layers you have between the user and the DB, naturally any game developer will want to tweak the client+schema before going live. The layers between we manage to make it as minimal as possible, so that shouldn't be touched, if it's too slow for a reasonable use case, it means we have more optimization to do!