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September 2026: The world today, as seen by one Polish guy

https://tomwojcik.com/posts/2026-09-21/september-2026-the-world-today/
209•marjancek•2h ago•100 comments

Livenerf: Has Opus 5.5 been nerfed yet?

https://github.com/ninjahawk/livenerf
622•bryan0•11h ago•251 comments

Solving Factorio Quality

https://exyr.org/2026/solving-factorio-quality/
72•laurenth•1d ago•24 comments

Dots: Always-on agents

https://openai.com/index/introducing-dots/
624•alvis•16h ago•481 comments

Vermont replacing power plants with home batteries

https://www.bbc.com/future/article/20260928-a-virtual-power-plant-hidden-in-vermont-homes-is-keep...
200•devonnull•15h ago•159 comments

U.S. postal inspectors shut down website selling counterfeit postage labels

https://postalemployeenetwork.com/news/2026/09/26/u-s-postal-inspectors-shut-down-website-selling...
232•ilamont•14h ago•136 comments

America.gov

https://america.gov/
562•plesiv•19h ago•473 comments

NASA asked several former SR-71A staffers to help secret restart

https://aviationweek.com/defense/aircraft-propulsion/nasa-asked-several-former-sr-71a-staffers-he...
171•ilamont•23h ago•170 comments

Testing WebGPU data layouts with Facet

https://www.mattkeeter.com/blog/2026-08-23-wgpu-facet/
41•luu•1d ago•0 comments

RSS Feeds for Last.fm

https://lfm.xiffy.nl/
72•Baljhin•7h ago•14 comments

Show HN: Real-time Solar System with 526k asteroids and all tracked satellites

https://space.bl2.net/
251•wanick•14h ago•56 comments

How Delhi cut electricity loss from 50 to 5 percent

https://spectrum.ieee.org/delhi-electricity-loss
523•rbanffy•21h ago•293 comments

Backblaze drive stats for Q2 2026

https://www.backblaze.com/blog/backblaze-drive-stats-for-q2-2026/
192•HieronymusBosch•20h ago•57 comments

GPT 6.1 Sol: Near-Astra intelligence for a fifth of the price

https://openai.com/index/introducing-gpt-6-1-sol/
945•crorella•16h ago•830 comments

Raleigh Vektar Restoration (2020)

https://retromash.com/2020/06/26/raleigh-vektar-restoration-part-1-the-arrival/
16•robin_reala•1d ago•3 comments

Phyllotaxis: An audio-reactive LED display

https://jagi.studio/posts/phyllotaxis/
295•evakhoury•1d ago•48 comments

Why Is Sam Altman a Free Man?

https://prospect.org/2026/09/29/artificial-intelligence-agents-openai-microsoft-sam-altman-greg-b...
90•ragall•2h ago•47 comments

Needed 1+1, built a functional programming language

https://hereticpleb.vercel.app/blog/needed-one-plus-one/
106•birdculture•17h ago•30 comments

Language models for text classification: From bag-of-words to Jev

https://magazine.sebastianraschka.com/p/classifier-history-and-jev
124•Anon84•22h ago•5 comments

When oil prices spike, where does the money go?

https://theconversation.com/when-oil-prices-spike-where-does-the-money-go-280763
88•thelastgallon•1d ago•74 comments

Ask HN: What are you reading?

284•dan-bailey•20h ago•568 comments

PS5 Relapse Exploit

https://github.com/ntfargo/Relapse-Exploit
312•therepanic•18h ago•187 comments

Show HN: Using 2D DFT, dithering, etc. to maximize eInk manga image quality

https://github.com/ciromattia/kcc
22•seam_carver•1d ago•4 comments

NAND-16: a computer built from 277,248 NAND gates

https://somethingbig.ai/computer
145•rossant•2d ago•84 comments

A Staff Engineer's Guide to Inventing Work

https://sujithjay.com/inventing-work
269•amortize•1d ago•56 comments

Floppy Emu Hardware Failure Analysis Results

https://www.bigmessowires.com/2026/09/29/floppy-emu-hardware-failure-analysis-results/
7•zdw•10h ago•1 comments

Show HN: NSL – WSL for Linux

https://frostyard.github.io/nsl/
134•bketelsen•19h ago•81 comments

NRC issues first U.S. construction permit for a BWRX-300 small modular reactor

https://www.gevernova.com/news/press-releases/nrc-issues-first-us-construction-permit-bwrx-300-sm...
38•papa-whisky•10h ago•12 comments

We’re forgetting what darkness feels like

https://www.theguardian.com/environment/2026/sep/29/night-sky-darkness-city-regulation
163•pseudolus•15h ago•84 comments

Show HN: A working 3D model of an Enigma machine

https://enigma.design
72•primitivesuave•16h ago•23 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...)