Zigzag Decoding with AVX-512

50 luu 2026-06-21 04:34:07 UTC zeux.io Llama Share 0

The author experimented with two optimizations for AVX-512 vertex decoding in meshoptimizer, but only one made it in. The first optimization used a branchless formulation to decode zigzag encoded integers, while the second used AVX-512 predication support to compile the branching variant directly.

Developers don't understand CORS (2019)

138 toilet 2026-06-21 02:34:07 UTC fosterelli.co Llama Share 55

Web developers often misunderstand how CORS works, leading to security vulnerabilities like the recent Zoom vulnerability, which was caused by bypassing CORS to access a localhost webserver. A secure implementation would involve implementing a REST API with CORS headers and a Content Security Policy to prevent unauthorized access.

Renting a sewing machine from the library

200 sohkamyung 2026-06-20 23:34:07 UTC bbc.com Llama Share 101

Finland's libraries are thriving as community service centers, offering more than just books, and promoting social inclusion and democracy. They are valued for their role in helping societies function, with over 700 libraries serving Finland's 5.6 million people.

Loupe – A iOS app that raises awareness about what native apps can see

218 Cider9986 2026-06-20 23:34:07 UTC github.com/mysk-research Llama Share 61

Loupe is an iOS app that shows device fingerprinting data from public APIs, helping users see what apps can quietly learn about their device. It's free and open source, with a Mac version in development.

The 100k Whys of AI

54 surprisetalk 2026-06-21 06:34:07 UTC lcamtuf.substack.com Llama Share 19

AI-generated text can be indistinguishable from human-written text under statistical tests, but it often exhibits distinctive patterns and mannerisms when used repeatedly. This can be seen in the similarities in AI-generated book titles and covers on Amazon, which can be a fuzzy signal that humans can pick up on.

Building reliable agentic AI systems

64 sarangk90 2026-06-21 04:34:07 UTC martinfowler.com Llama Share 13

Bayer AG developed the Preclinical Information Center (PRINCE) platform to address pharmaceutical industry challenges in drug development, leveraging Agentic Retrieval-Augmented Generation and Text-to-SQL to integrate decades of safety study reports. PRINCE evolved from a keyword-based search tool to an intelligent research assistant capable of answering complex questions and drafting ...

Epoll vs. io_uring in Linux

131 Sibexico 2026-06-20 23:34:07 UTC sibexi.co Llama Share 35

The user discusses the differences between epoll and io_uring for handling asynchronous I/O on Linux, highlighting io_uring's efficiency and reduced syscall overhead. io_uring is recommended for modern Linux projects due to its improved performance and architectural changes.

Slow breathing modulates brain function and risk behavior

161 croes 2026-06-20 22:34:07 UTC cell.com Llama Share 35

Prolonged exhalation breathing can increase cardiac parasympathetic activity, leading to enhanced reward sensitivity and increased risky choices. This effect is associated with changes in brain activity in regions involved in reward processing, such as the ventromedial prefrontal cortex and precuneus.

Show HN: TownSquare, a tiny presence layer for websites

147 cauenapier 2026-06-20 22:34:07 UTC townsquare.cauenapier.com Llama Share 79

TownSquare is a web platform where users can interact without accounts or algorithms, sharing a virtual space. It features simple controls for movement, chat, and social interactions, creating a fun and playful online experience.

15-minute at-home Lyme disease tick test

94 bookofjoe 2026-06-21 00:34:07 UTC bostonglobe.com Llama Share 39

LymeAlert is a 15-minute tick test that can detect Lyme disease, priced at $40 per test. It's designed to help people avoid unnecessary doctor visits and antibiotic doses by testing ticks for the disease.

Your brain was never designed for this much bad news

125 colinprince 2026-06-21 04:34:07 UTC sciencedaily.com Llama Share 78

Humans are overwhelmed by bad news due to their natural negativity bias, which was adaptive in the past but now causes stress and fatigue. To manage news fatigue, people can contain news consumption, choose depth over volume, and identify actions they can take to feel more in control.

Guide to the TD4 4-bit DIY CPU

27 andrewstuart 2026-06-21 02:34:07 UTC philipzucker.com Llama Share 3

The user built a 4-bit CPU kit called TD4 from Aliexpress, which has 2 registers, LEDs, and 16 bytes of program ROM, and wrote notes to help others understand its architecture and usage. The user encountered some difficulties during assembly, including soldering the USB connector and understanding the directionality of surface mount diodes, but eventually got the CPU working and wrote a ...

The Lost Story of Alan Turing's "Delilah" Project

10 asdefghyk 2026-06-21 05:34:07 UTC spectrum.ieee.org Llama Share 1

Alan Turing worked on a top-secret voice-encryption system called Delilah during World War II. The Bayley papers, recently auctioned, reveal Turing's electrical engineering skills and his work on Delilah, a portable voice-encryption system.

SMPTE Makes Its Standards Freely Accessible

248 zdw 2026-06-20 17:34:07 UTC smpte.org Llama Share 73

SMPTE has made its entire Standards catalog freely available to the global media technology community. This move aims to accelerate adoption and implementation, strengthen interoperability, and drive innovation in the industry.

UHF X11: X11 Built for VisionOS and Apple Vision Pro

192 zdw 2026-06-20 17:34:07 UTC lispm.net Llama Share 35

visionOS receives X11 calls from clients and vintage machines, opening each top-level window separately. X authority cookies are generated on device and copied to clients for secure connections.

DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilots

235 LowLevelMahn 2026-06-20 15:34:07 UTC neuviemeporte.github.io Llama Share 62

The F-15 Strike Eagle 2 reconstruction project has made significant progress, with all C code rewritten and data moved from assembly to C. The project is now open for testing and bug reporting, with the latest release v0.9.1 available for download.

Excessive nil pointer checks in Go

12 ingve 2026-06-21 05:34:07 UTC konradreiche.com Llama Share 7

Defensive programming in Go should focus on checking inputs, bounds, and pointers before dereferencing them, but not with nil checks that silently handle impossible states. Instead, establish invariants and model intentional optional states to ensure the system can rely on guarantees, rather than relying on fear-driven clutter with nil checks.

When I reject AI code even if it works

151 vnbrs 2026-06-21 01:34:07 UTC vinibrasil.com Llama Share 84

Using AI for coding generates a large volume of code that requires human review to ensure quality and scalability. Engineers should guide AI coding agents to produce adequate solutions, not rely solely on AI reviews.

Unauthorized alert sent to cell phones across Brazil

120 zdw 2026-06-20 20:34:07 UTC cnn.com Llama Share 85

Unauthorized alert with "misantropi4" message sent to cell phones in Brazil, suspected to be a hacker attack. Brazilian government is investigating the incident and restoring the National Civil Defense's warning platform.

Public Service Announcement: Don't Say You Use AI for Writing

8 satisfice 2026-06-21 05:34:07 UTC satisfice.com Prefix Share 0

…also don’t tell lies. But I’m getting ahead of myself already. I keep running into people online who openly say that they use AI to do their writing for them. Now, technically, they may say they use AI to “help” their writing. It doesn’t matter. The distinction is immediately lost on everyone who sees that assertion, because when AI writes for you it does a lot more than just “help,” and ...

Armstrong Effect

23 userbinator 2026-06-21 04:34:07 UTC en.wikipedia.org Llama Share 1

The Armstrong effect is a physical process producing static electricity through fluid friction, discovered in 1840 by William Armstrong. It involves sparks generated by steam or compressed air, and was later used in Armstrong's electrostatic generators.

Whole cross-sectional human ultrasound tomography

63 lnyan 2026-06-20 23:34:07 UTC nature.com Llama Share 10

Researchers developed a new system for whole cross-sectional ultrasound tomography, enabling imaging of the entire human cross-section in reflection and transmission modes. This system has potential applications in clinical needs, such as adipose thickness assessment and video-rate biopsy needle localization.

NOLA 'Nacular: One man's crusade to preserve New Orleans's vernacular signage

35 NaOH 2026-06-21 02:34:07 UTC countryroadsmagazine.com Llama Share 2

Anthony DelRosario documents New Orleans' hand-painted signs as a form of vernacular art. His project, Nola 'Nacular, preserves the city's unique voice and culture.

Linux eliminates the strncpy API after six years of work, 360 patches

176 simonpure 2026-06-20 21:34:07 UTC phoronix.com Llama Share 149

Linux 7.2 has eliminated the deprecated strncpy API due to bugs and performance issues. It has been replaced with alternative functions like strscpy() and memcpy().

Project Fetch: Phase Two

54 stopachka 2026-06-21 00:34:07 UTC anthropic.com Llama Share 20

Anthropic's Claude model has improved significantly, enabling it to complete tasks 20 times faster than humans without assistance. However, it still struggles with precise robotic control and adapting to new tasks.

Alice is impatient

83 birdculture 2026-06-20 22:34:07 UTC brooker.co.za Llama Share 25

You're measuring time in requests or outages, but users like Alice and Alex experience time in seconds and minutes, leading to a discrepancy in perceived wait times. This is due to the inspection paradox, where users experience a time-weighted version of the latency distribution, resulting in a higher mean time to recovery than the actual MTTR.

Proportional-Integral-Derivative Controllers

20 dhorthy 2026-06-21 05:34:07 UTC en.wikipedia.org Llama Share 7

A PID controller is a feedback-based control loop mechanism used in industrial control systems to manage machines and processes with continuous control and automatic adjustment. It compares the desired target value with the actual value of the system and applies corrective actions to bring the system to the desired setpoint using proportional, integral, and derivative methods.

Temporary Cloudflare accounts for AI agents

202 farhadhf 2026-06-20 11:34:07 UTC blog.cloudflare.com Llama Share 106

Cloudflare updated Wrangler to allow agents to deploy code without signing up for an account. Agents can now use the --temporary flag to deploy code instantly, with a 60-minute claim window to make the account permanent.

Show HN: StartupWiki – A Free Alternative to Crunchbase

191 shpran 2026-06-20 16:34:07 UTC startupwiki.tech Full Share 59

StartupWiki is a community-driven AI-powered research directory of global startup ventures. Explore AI, Biotech, CleanTech, FinTech and more.

Semiconductor Lifeline Keeps Fighter Jets in the Air

68 rbanffy 2026-06-20 21:34:07 UTC spectrum.ieee.org Llama Share 19

Phoenix Semiconductor repackages off-the-shelf semiconductors to replace unavailable chips for the US Navy and other customers. The company aims to bridge the gap between high-mix, low-volume demand and large chip manufacturers.