Hacker News

Top stories

Live mirror
30 storiesupdated just nowView source snapshot
  1. Claude Code now reads AGENTS.md if there is no Claude.md(claude.com ↗)
    133comments
  2. Android 17 is the first since 3.x to add new APIs without releasing to the AOSP(grapheneos.social ↗)
    184comments
  3. Saving another 100TB of RAM(cloudflare.com ↗)
    33comments
  4. Cloudflare Quick Tunnels(cloudflare.com ↗)
    218comments
  5. Xcode 27.1 Beta Release Notes(developer.apple.com ↗)
    58comments
  6. Cache-to-Cache: Direct Semantic Communication Between LLMs (2025)(arxiv.org ↗)
    11comments
  7. Photon-Emission-Guided Laser Fault Injection Enables RP2350 Secure Debug(ledger.com ↗)
    44comments
  8. Show HN: Cactus Needle 3: 8-29MB automation models can match DeepSeek V4 Flash(cactuscompute.com ↗)
    71comments
  9. How to Write with an LLM(sockpuppet.org ↗)
    241comments
  10. US troop deaths during Iran war exceed Pentagon count by at least four(reuters.com ↗)
    15comments
  11. OpenJev(openjev.com ↗)
    237comments
  12. The first new cat species discovered in 100 years(nationalgeographic.com ↗)
    35comments
  13. The Implications of Linguistic Illegibility for LLM Security(arxiv.org ↗)
    17comments
  14. Two parallel neural ectoderm progenitors contribute to the developing brain(newscientist.com ↗)
    51comments
  15. Cyclomatic Complexity in C#(ndepend.com ↗)
    9comments
  16. From Geometry to Algebra and Back Again: 4000 Years of Papers (2023) [video](youtube.com ↗)
    discuss
  17. C++26: Trivial infinite loops are no longer undefined behaviour(sandordargo.com ↗)
    167comments
  18. Minimal Phone 2(minimalcompany.com ↗)
    146comments
  19. How SpaceX streamlined the Raptor engine(construction-physics.com ↗)
    24comments
  20. Warez: The Infrastructure and Aesthetics of Piracy (2021)(archive.org ↗)
    12comments
  21. Size-Specialized Memory Allocation(go.dev ↗)
    3comments
  22. Inside ZCode: Silently uploading your Git history to the cloud(ferstar.org ↗)
    89comments
  23. I vibed a proof of Conway's conjecture(overreacted.io ↗)
    174comments
  24. A search-and-inference database from scratch in pure Zig(antfly.io ↗)
    16comments
  25. Korea raises data breach fines to 10% of revenue(koreajoongangdaily.com ↗)
    71comments
  26. Cekura (YC F24) Is Hiring(ycombinator.com ↗)
    discuss
  27. Mathematicians Build Long-Awaited Graph Sandwich(quantamagazine.org ↗)
    15comments
  28. US Military had close call after using AI for hallucinated intelligence report(cnn.com ↗)
    280comments
  29. Border agents can search cellphones without a warrant or reasonable suspicion(lawandcrime.com ↗)
    135comments
  30. North Korean nuclear test sets off years of earthquakes(science.org ↗)
    148comments

Saving another 100TB of RAM

166 pointsby 4h agoblog.cloudflare.com
21 comments
2h agoHN ↗

Bang up article! As someone who doesn't get to do enough (almost any) calculus in my daily programming assignments, I thoroughly enjoyed reading about Kevin's dive into that derivation (linked in the supplemental article). All the people being negative here can swallow raisins

1h agoHN ↗

Thanks! Maybe dial it back or people are going to think I paid you

2h agoHN ↗

The only Rust section is the one on storage improvements about the struct that stores the hash, but do they really need that many hashes that 2 bytes makes that big of a difference? Article doesn't expand, but I guess it's a hash for every task on every computer, so maybe yes.

2h agoHN ↗

That's exactly his point/the area of cost saving - that they didn't actually need as many hashes as they had started with. The trick was in finding out how many hashes they could cull without degrading load balance.

2h agoHN ↗

These optimizations are impressive, but it gets me thinking: at what point does a company become a collection of impenetrable siloes, where nothing really does what you expect? Maybe know with AI this is less of an issue as exploring a codebase is also much faster.

1h agoHN ↗

My intuition around larger companies is they are already impenetrable silos, and AI makes it worse

1h agoHN ↗

I feel like any company whose products have RESTful interfaces are already there…

One wants to turn on an indicator on a remote device. A simple Boolean value. But we need networking, TLS, authentication plugins, certificate validation, distributed logging, containers, orchestration, HTTP client/server, interprocess communication, daemon dependency management, …

Sure, one can say each of these layers and abstractions has an important and justifiable purpose. But one can also step back and start wondering - what the hell are we really doing???

At some level, it seems like each layer of abstraction has to manage others, only simply because they exist.

Imagine the simplicity of 1800s telegraph signaling - no software!

Too often we build systems with Fortune-50 style hierarchies when a 5-person team could do the whole job.

1h agoHN ↗

Build a system as simple as possible but no simpler.

An 1800s telegraph system doesnt work in the modem world, there is far too much communication and the system would just collapse into molten slag.

All those things you've listed are because we live in an adversarial world and I'd steal all your money off the telegraph wire if you tried it.

1h agoHN ↗

Having worked in hardware for a moment, everything we do in software is like this. Even C.

58m agoHN ↗

There are a whole series of blog posts from the Fishworks guys explaining why it could possibly be so hard to turn on one LED.

But Oracle probably deleted then so you'll have to find them on archive.org.

1h agoHN ↗

And at what point does a company start to care about performance? 100TB of RAM is expensive as hell, but getting products to market faster was worth the cost

1h agoHN ↗

Cloudflare is truly amazing, they have made so much possible for my main side-project at a price and performance that I can’t really take credit for (http://sourcelibrary.org), I don’t care if their text was written with AI, I just wish I could get my own AI to sing so well about hashing… but wait.. today I noticed Claude trying to use hashing when a timestamp would honestly do, and now I’m really doubting myself, hmm…

1h agoHN ↗

This is pleasant coincidence. Really like your site and it's queued to send in my newsletter in the morning! Just happened to see your comment here while I was reading. Great work.

40m agoHN ↗

I don’t care if their text was written with AI, I just wish I could get my own AI to sing so well about hashing… but wait.. today I noticed Claude trying to use hashing when a timestamp would honestly do, and now I’m really doubting myself, hmm…

Tried out the first 1000 words in Pangram, and it seemed happy it was human written. Not surprised either, it has been some of the better writing I've seen out of Cloudflare recently.

36m agoHN ↗

An AI would have known that saying, “Hi, mom” in a professional post was a bad idea.

1h agoHN ↗

anyone remember 100tb hosting company?

1h agoHN ↗

Someone really needed a few hundred TB to waste on inference and went looking under the rugs…

52m agoHN ↗

CPU DRAM can't really be used for inference efficiently -- inference mostly wants memory bandwidth, not memory capacity, and GPU DRAM has >10x more bandwidth. The fabs can switch between them but you can't switch after the fact.

39m agoHN ↗

Those machines with GPUs still need RAM of their own, and they generally want large caches to avoid SSD penalties. You even see this spill out in the form of costs for KV cache in <1min, 5m, 1hr rates etc.

48m agoHN ↗

I definitely enjoyed this writing style more than a lot of the recent cf blog posts. Cool article!

18m agoHN ↗

does this mean RAM prices can go down now? Please?