frontpage.
newsnewestaskshowjobs

Open Source @Github

fp.

We should be more ambitious with the software we build

https://danluu.com/ambitious/
369•ltratt•10h ago•318 comments

Cerebras Deploys Trillion-Parameter AI Models

https://www.cerebras.ai/blog/how-we-deploy-trillion-parameter-frontier-models-on-cerebras
136•gmays•6h ago•45 comments

How Japanese Dried Bonito Is Made

https://kottke.org/26/10/how-japanese-dried-bonito-is-made
24•bookofjoe•2d ago•3 comments

The Goose Programming Language

https://aardappel.github.io/goose/
364•bobbydigitales•13h ago•240 comments

SpeedCrunch 1.1

https://www.speedcrunch.org/
134•LordNibbler•13h ago•24 comments

Small Programs and Languages

https://ratfactor.com/cards/pl-small
100•andsoitis•10h ago•7 comments

Why Gopher in 2026?

https://gopher.muffinlabs.com/sdf.org/users/nervtoji/phlog/001.txt
72•andsoitis•8h ago•21 comments

America has lost 200k of jobs in media, film and the arts. How much is AI?

https://www.apricitas.io/p/ai-and-the-fall-of-the-creative-class
336•gnabgib•9h ago•328 comments

I Built a Stereo Vision Board for Hardware Hackers

https://rootkitlabs.com/2026/10/06/i-built-a-stereo-vision-board-for-hardware-hackers/
67•machinehum•4d ago•12 comments

I don't understand quantum physics (2018)

https://www.southampton.ac.uk/~doug/quantum_physics/index.html
309•rramadass•22h ago•244 comments

FreeDNS

https://freedns.afraid.org/
286•esher•17h ago•74 comments

Social dynamics of toxic metal industry in medieval Europe

https://www.cambridge.org/core/journals/antiquity/article/social-dynamics-of-toxic-metal-industry...
41•XzetaU8•4d ago•14 comments

Node2Shell evolves to HTTP2Shell, blast radius affects many HTTP libs and apps

https://www.aikido.dev/blog/python-packages-vulnerable-node2shell-brotli-cve-2026-111497
304•theanonymousone•1d ago•151 comments

Local Wikipedia: Wikipedia, but only for things a half hour walk from you

https://edjefferson.com/localwiki/
1581•sohkamyung•2d ago•246 comments

In Rainbows

https://hitogata.neocities.org/Rainbows
26•surprisetalk•2d ago•4 comments

The Importance of Limitations for Creativity and Learning (2023)

https://ratfactor.com/cards/limitations
60•andsoitis•10h ago•16 comments

A story of a Figma bug that wasn't a bug at all (2021)

https://aresluna.org/this-is-a-story-of-a-figma-bug/
26•jllyhill•3d ago•1 comments

Pragtical v3.14 Lua-based text editor adds menus, floating views, and sessions

https://pragtical.dev/blog/pragtical-v3140-release
13•rd07•4d ago•1 comments

The St. Helena 5 pence coin shows Jonathan, a roughly 190 year old tortoise

https://de.numista.com/9866
114•schleck8•15h ago•36 comments

Rewriting a Commercial Engine in Jai

https://polygonjs.com/blog/why-i-rewrote-polygon-from-scratch
3•frading•2d ago•1 comments

Neural chip decodes interactions between brain regions

https://actu.epfl.ch/news/neural-chip-decodes-interactions-between-brain-r-2/
104•giuliomagnifico•16h ago•37 comments

GPU-unlock: FP/BF16 instruction issue rate on Nvidia 3000's cards

https://github.com/Zagitta/gpu-unlock
236•fragebogen•22h ago•71 comments

Show HN: Steal My Bitcoin

https://stealmybitcoin.com/
466•cloudlandsdev•11h ago•292 comments

Roku developer repositories moved from GitHub to GitLab

https://blog.roku.com/developer/gitlab-move
285•cxr•16h ago•196 comments

Bbtree: Fastest Ordered Map

https://bbtree.xiangpeng.systems/post/
105•aoli-al•14h ago•10 comments

Physicists trap a single antimatter particle for a month

https://www.scientificamerican.com/article/physicists-trap-a-single-antimatter-particle-for-a-month/
304•mooreds•3d ago•86 comments

Five Qwen3.8-27B models match Fable 5 Using GVS5H Harness

https://github.com/slee-persis/GVS5H
151•rzk•4h ago•50 comments

How close can pure functional programming get to C?

https://rtfeldman.com/fp-vs-c
268•stmonty•1d ago•92 comments

A practical guide to AI image generation, from diffusion to agents

https://danielball.com/notes/ai_image_generation.html
261•westsmith•4d ago•83 comments

Why is AI generated language so hard to understand?

https://arxiv.org/abs/2610.29162
191•canjobear•14h ago•166 comments
Open in hackernews

The Scalar Select Anti-Pattern

https://matklad.github.io/2025/05/14/scalar-select-aniti-pattern.html
47•goranmoomin•1y ago

Comments

castratikron•1y ago
As long as processing one event does not affect any of the other events in the batch. E.g. events are file IO, and processing one event causes another event's descriptor to get closed before that event can be processed.
wahern•1y ago
If the close routine on an event source, or the low-level (e.g. epoll) registration, deregistration, and dequeueing logic doesn't know how to keep polling and liveness state consistent between userspace and the kernel, they've got much bigger problems. This looks like Rust code so I would hope the event stream libraries are, e.g., keeping Rc'd file objects and properly managing reference integrity viz-a-viz kernel state before the application caller ever sees the first dequeued event in a cycle. This is a perennial issue with event loop libraries and buggy application code (in every language). One can't just deal with raw file descriptors, call the close syscall directly, etc, hoping to keep state consistent implicitly. There's an unavoidable tie-in needed between application's wrappers around low-level resources and the event loop in use.
taeric•1y ago
I'm not entirely clear on what the proposal is at the end? Seems that the long term answer as to "which of these implications to pursue" is "all of them?" Simply taking in a batch of instructions doesn't immediately change much? You still have to be able to do each of the other things. And you will still expect some dependencies between batches that could possibly interact in the same ways.

In a sense, this is no different than how your processor is dealing with instructions coming in. You will have some instructions that can be run without waiting on previous ones. You will have some that can complete quickly. You will have some that are stalled on other parts of the system. (I'm sure I could keep wording an instruction to match each of the implications.)

To that end, part of your program has to deal with taking off "whats next" and finding how to prepare that to pass to the execution portion of your program. You can make that only take in batches, but you are almost certainly responsible for how you chunk them moreso than whatever process is sending the instructions to you? Even if you are handed clear batches, it is incumbent on you to batch them as they go off to the rest of the system.

lmz•1y ago
I guess the proposal is "instead of fetching and acting on one event at a time, consider fetching all available events and look for opportunities to optimize which ones you process (e.g. by prioritization or by skipping certain events if superseded by newer ones)".
taeric•1y ago
I mean, I got that. But you could as easily say "instead of fetching and acting on one event at a time, fetch and triage/route instructions into applicable queues."

In particular, there is no guarantee that moving to batches changes any of the problems you may have from acting on a single one at a time. To that end, you will have to look into all of the other strategies sooner or later.

Following from that, the problem is not "processMessage" or whatever. The problem is that you haven't broken "processMessage" up into the constituent "receive/triage/process/resolve" loop that you almost certainly will have to end up with.

malkia•1y ago
in CPU's - pipelining!
jchw•1y ago
I believe something similar is going on internally in Windows with event queues. It coalesces and prioritizes input events when multiple of them pile up before you're able to pop new events off of the queue. (For some events, e.g. pointer events, you can even go and query frames that were coalesced during input handling.) On the application/API end, it just looks like a "scalar select" loop, but actually it is doing batching behavior for input events!

(On the flip side, if you have a Wayland client that falls behind on processing its event queue, it can crash. On the whole this isn't really that bad but if you have something sending a shit load of events it can cause very bad behavior. This has made me wonder if it's possible, with UNIX domain sockets, to implement some kind of event coalescing on the server-side, to avoid flooding the client with high-precision pointer movement events while it's falling behind. Maybe start coalescing when FIONREAD gets to some high watermark? No idea...)