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Category: Development

BitChat: Open-Source, Offline, Encrypted Messaging via Bluetooth Mesh

2025-07-07
BitChat: Open-Source, Offline, Encrypted Messaging via Bluetooth Mesh

BitChat is a secure, decentralized, peer-to-peer messaging app built on Bluetooth mesh networks. No internet, servers, or phone numbers are required; just pure encrypted communication using X25519 key exchange and AES-256-GCM. Features include room-based chats (with optional password protection), offline message storage and forwarding, and a strong focus on privacy (no accounts, phone numbers, or persistent identifiers). BitChat offers native support for iOS and macOS, incorporating performance optimizations like LZ4 compression and adaptive battery modes. The project is open-source and designed for cross-platform compatibility.

(github.com)
Development Bluetooth Mesh Decentralized

Functions are Vectors: Extending Linear Algebra to Infinite Dimensions

2025-07-06

This article explores the concept of functions as infinite-dimensional vectors, demonstrating how the tools of linear algebra can be applied to a wide range of problems, from image and geometry processing to curve fitting, light transport, and machine learning. Starting with finite-dimensional vector spaces, it progresses to infinite dimensions, proving that functions form a vector space. The article then delves into linear operators, differentiation, the Laplacian operator, and the spectral theorem's application in function spaces, culminating in application examples such as Fourier series, image compression, and spherical harmonics.

(thenumb.at)
Development function spaces spectral theorem

240Hz Monitor and Low-Latency Mouse: A Programmer's Precise Measurement

2025-07-06

A programmer, highly sensitive to latency, found a significant improvement after upgrading to a 240Hz monitor. However, switching USB ports for his wireless mouse introduced delays of around 10ms every few seconds. To precisely measure this, he developed a tool, found.as/l, that displays the delay between browser-rendered frames and pointer movements, along with pointer event batching and offsets. He also had to modify his xmit.toml to add CORS headers for high-precision timers. His observations were confirmed, leading him to avoid the problematic USB port.

(nothing.pcarrier.com)
Development 240Hz monitor mouse delay

BreakerMachines: Shield Your Microservices from Cascading Failures

2025-07-06
BreakerMachines: Shield Your Microservices from Cascading Failures

In the world of microservices, cascading failures and retry storms are nightmares for developers. BreakerMachines, a Ruby library, acts as a guardian, protecting your system from these disasters using a sophisticated circuit breaker mechanism. Built on the battle-tested state_machines gem, it offers classic and Fiber modes, supports asynchronous operations, and provides flexible configuration options to adjust thresholds and timeouts based on service criticality and traffic. BreakerMachines effectively prevents cascading failures and helps quickly locate problems through visual dashboards and smart alerts, thus improving system stability and reliability.

(github.com)
Development circuit breaker failure protection

No-Code Hackathon Win: The AI Prodigy

2025-07-06
No-Code Hackathon Win: The AI Prodigy

Collin Turcios, a former professional Yu-Gi-Oh! player with an unconventional background, stunned the tech world by winning second place in a hackathon without writing a single line of code. Using ChatGPT and simple English prompts, he created a program to convert songs into lo-fi versions. His win highlights the transformative power of AI in development and challenges traditional notions of coding expertise.

(sfstandard.com)
Development

Pure CSS Logic Gates: An Experimental CSS if() Function in Chrome 137+

2025-07-06

This blog post demonstrates the implementation of pure CSS logic gates using the experimental CSS `if()` function available in Chrome 137+. It covers basic gates like AND, OR, NOT, and XOR, and progresses to more complex circuits such as half-adders, full-adders, and multiplexers. By cleverly leveraging CSS variables and conditional statements, the author achieves functionality typically relegated to hardware or programming languages, showcasing the potential of CSS in computation.

(yongsk0066.github.io)
Development Logic Gates if function

Making Everything Testable: Mitchell's GPU Testing Challenge

2025-07-06
Making Everything Testable: Mitchell's GPU Testing Challenge

HashiCorp co-founder Mitchell faced a significant challenge while developing his latest project, Ghostty, a GPU-rendered terminal emulator: testing the GPU rendering code. This article summarizes his BugBash presentation, exploring how to make seemingly untestable code testable. It highlights the lack of widely accepted solutions for GPU testing in the age of AI, making Mitchell's approach particularly valuable. His solution and the work at Antithesis demonstrate a commitment to pushing the boundaries of software testing.

(antithesis.com)
Development GPU testing

Overthinking GIS: A Laplacian Approach to Terrain Usability

2025-07-06
Overthinking GIS: A Laplacian Approach to Terrain Usability

The author explores a novel approach to assessing terrain usability by calculating the rate of change of terrain slope. Using DEM data from the USGS, they leverage OpenCV's Laplacian operator to compute the rate of change of pixel values in an image, reflecting changes in terrain slope. A sliding window is then used to calculate area averages, and a threshold is set to generate a binary "usability" map. The author ultimately discovers this is effectively a complex downsampling method.

(scottsexton.co)
Development Terrain Analysis

GitHub Copilot Chat Goes Open Source: Transparency in AI Coding

2025-07-06
GitHub Copilot Chat Goes Open Source: Transparency in AI Coding

Microsoft open-sourced the GitHub Copilot Chat extension for VS Code, offering unprecedented transparency into its AI-powered code assistant. Copilot Chat understands codebases, helping developers clean up functions, add error handling, explain logic, and even refactor files. Its 'Agent mode' automates compilation, error fixing, test monitoring, and more. While the underlying models remain closed-source, the open-sourced VS Code extension allows auditing, customization, and even building new tools on top of it, significantly increasing trust and transparency in AI tools.

(nerds.xyz)
Development

KDE Plasma 6.4.0 Now in OpenBSD Packages

2025-07-06

KDE Plasma 6.4.0 is now available in OpenBSD packages thanks to the work of Rafael Sadowski and others. Significantly, the KDE Kwin team has split kwin into kwin-x11 and kwin (Wayland), signaling a reduced focus on X11 in favor of Wayland. This update also includes the Aurorae theme engine and bug fixes from June and July.

(undeadly.org)
Development

My Haskell Side Quest: RPN Calculator and Monadic Parsing

2025-07-06
My Haskell Side Quest: RPN Calculator and Monadic Parsing

In pursuit of a job, the author embarked on a journey into functional programming with Haskell, culminating in building a Reverse Polish Notation (RPN) calculator. The article details the shift from imperative to functional thinking, covering core Haskell concepts like recursive types, lambda functions, and curried functions. It delves into monadic parsing, ultimately resulting in a robust RPN parser. The author highlights the elegance and readability of functional code and the power of monads in handling complex parsing tasks.

(mattwills.bearblog.dev)
Development Reverse Polish Notation

arXivLabs: Experimenting with Community Collaboration on arXiv

2025-07-06
arXivLabs: Experimenting with Community Collaboration on arXiv

arXivLabs is a framework enabling individuals and organizations to develop and share new features directly on the arXiv website. Collaborators must adhere to arXiv's values of openness, community, excellence, and user data privacy. Got an idea to enhance the arXiv community? Explore arXivLabs.

(arxiv.org)
Development

Measuring Latency in Algorithmic Trading: From Simple Timers to System-Level Simulation

2025-07-06
Measuring Latency in Algorithmic Trading: From Simple Timers to System-Level Simulation

In low-latency algorithmic trading, milliseconds—even microseconds—matter. This article explores the challenges of accurately measuring latency in algorithmic trading systems. Simple timing methods fall short, failing to capture network I/O and other crucial factors. The author proposes a more comprehensive approach: using simulated exchanges and ATS to model the complete trading process for precise latency measurement. The article clearly explains the pros and cons of various methods and highlights the challenges encountered in pursuing ultimate performance.

(www.architect.co)
Development algorithmic trading latency measurement

pgstream: Cracking the Code on PostgreSQL Snapshot Performance

2025-07-06
pgstream: Cracking the Code on PostgreSQL Snapshot Performance

Recent pgstream releases have dramatically improved PostgreSQL snapshot performance. Initially, the write path was the bottleneck. By switching to bulk ingestion (COPY FROM) and deferring index creation, pgstream now outperforms pg_dump/pg_restore in snapshot speed. Further improvements to batch configuration ensure more stable and efficient snapshot handling across varied data sizes and table structures.

(xata.io)
Development

Outsourcing Nightmare: The High Cost of Cheap Code

2025-07-06
Outsourcing Nightmare: The High Cost of Cheap Code

A company outsourced a project to an overseas team, hoping to save money. However, poor communication and low-quality code led to numerous problems. The cheap overseas programmers failed to properly address a SQL injection vulnerability and even created a ridiculous name-based 'security' mechanism causing random errors. The internal team ultimately had to spend far more time fixing the mess, highlighting the significant risks of low-cost outsourcing. The story underscores that quality development isn't solely about price; effective communication and technical skill are paramount.

(thedailywtf.com)
Development outsourcing

myNoise Android App Launch: A Year of Struggle and Triumph

2025-07-06
myNoise Android App Launch: A Year of Struggle and Triumph

After a year-long development odyssey, the new myNoise Android app is finally live. This post details the challenges of Android development: device fragmentation, the app store's pay-to-play model, and high maintenance costs. The author recounts the journey from initial iOS success to the Android app's rebuild, highlighting the team's contributions. Despite negative reviews and financial strain, the author remains optimistic and appeals for user support to ensure the project's success.

(mynoise.net)
Development

Local-First Software: Reclaiming Ownership of Your Data

2025-07-06
Local-First Software: Reclaiming Ownership of Your Data

Cloud apps are convenient, but your data is entirely at the mercy of the service provider. This article explores "local-first" software, which stores data on your local device and uses technologies like CRDTs to enable real-time collaboration while retaining data ownership. The authors demonstrate the feasibility of local-first software with three prototype applications and highlight future research directions, including improving CRDT performance, refining user interfaces, and exploring decentralized networking.

(www.inkandswitch.com)
Development

Serving 200M+ Requests/Day with a Modern CGI Setup

2025-07-06
Serving 200M+ Requests/Day with a Modern CGI Setup

Revisiting the 90s CGI technology, the author built a Go + SQLite CGI program on a 16-thread AMD 3700X, achieving over 200 million requests per day. This experiment challenges the long-held belief of CGI's inefficiency, highlighting that modern languages (Go, Rust) and powerful hardware make CGI surprisingly effective in multi-core environments. While not advocating widespread adoption, the author demonstrates the fascinating evolution of technology and the value of re-examining past assumptions.

(simonwillison.net)
Development

Local-First Software: Scaling Without the Headache

2025-07-05

Harper, a local-first grammar checker, experienced a massive user surge after hitting Hacker News' front page. Unlike server-dependent software, Harper runs on the user's device, eliminating server load concerns. Even with the user influx, there were no hiccups or latency issues. This highlights the scalability advantage of local-first software, avoiding the high costs of server maintenance and complex cloud architectures.

(elijahpotter.dev)
Development server load

NEC2: Legendary Numerical Electromagnetics Code

2025-07-05

This website is a central repository for documentation and code examples related to NEC2 (Numerical Electromagnetics Code), a Method of Moments based electromagnetic simulation software. Developed in 1981 by Jerry Burke and A. Poggio at Lawrence Livermore Labs for the US Navy, NEC2 is now publicly available. The site offers instructions on running NEC2 in a Windows environment, tutorials, sample models, and a user manual (HTML and PDF versions) covering program description and user guides. Additionally, it provides details on constructing a BiQuad antenna, its NEC simulation model, links to a NEC mailing list, and other related resources.

(www.nec2.org)
Development electromagnetic simulation

Neon Database Performance Debate: There's No Free Lunch

2025-07-05

Recently, there's been a lot of discussion on X/Twitter and by Planetscale's CEO regarding Neon database performance. The author points to a passage from *Project Hail Mary* highlighting that one system might be less efficient but far more scalable than another. This serves as a reminder that there's no silver bullet in distributed system design; both Neon and Planetscale excel in their own niches. While negativity and drama on X/Twitter attract attention, it's important to remember that there's no universally optimal solution.

(blog.alexoglou.com)
Development

Codebuff's Year One: From CLI Coding Tool to Multi-Agent Architecture

2025-07-05
Codebuff's Year One: From CLI Coding Tool to Multi-Agent Architecture

The Codebuff team reflects on their first year building the best coding agent. From a initial CLI prototype to a multi-agent architecture, they experienced rapid growth but also faced reliability challenges. The post summarizes lessons learned, including prioritization, feature pruning, and the importance of teamwork, and looks ahead to future trends in coding agents, such as the multi-agent paradigm, live learning, and autonomous code commits.

(jamesgrugett.com)
Development

Commodore PET BASIC Tokenizer: A Curious Bug

2025-07-05
Commodore PET BASIC Tokenizer: A Curious Bug

This article explores a quirky bug in early Commodore PET BASIC tokenizers stemming from their whitespace handling. Early BASIC interpreters ignored spaces between keywords, leading to 'LET THEN' being interpreted as 'LETHEN', resulting in syntax errors. The article delves into the BASIC tokenization process, explaining why ignoring whitespace improved efficiency, and dissects the Commodore BASIC 1.0 tokenizer code. It ultimately reveals the root cause of the bug and its fix in later versions.

(www.masswerk.at)
Development

Gecode: A High-Performance Open-Source Constraint Solver

2025-07-05

Gecode is an open-source C++ toolkit for building constraint-based systems. Known for its state-of-the-art performance and modular design, it boasts a comprehensive set of features including constraints over integers, Booleans, sets, and floats (over 70 global constraints from the Global Constraint Catalog and many more). Gecode offers advanced branching heuristics, multiple search engines (including parallel search), MiniZinc support, automatic symmetry breaking, and restart mechanisms. Its extensive documentation and over 50,000 test cases ensure reliability and ease of use. Gecode swept all gold medals in the MiniZinc Challenges from 2008 to 2012, showcasing its exceptional performance.

(www.gecode.org)
Development constraint solver

The AI Revolution: Will Devs Still Find Job Satisfaction?

2025-07-05

The rise of AI coding tools is transforming the role of software developers. The author recounts their transition from developer to CTO, highlighting the decrease in job satisfaction that came with managing people and projects rather than writing code. While AI boosts efficiency, it diminishes the challenge and reward of coding, pushing developers into more managerial roles. This raises crucial questions about the future of the profession: how will developer value be defined? How can developers adapt and maintain skills in this evolving landscape?

(jamie.ideasasylum.com)
Development Job Satisfaction

AI Coding Agents: The Secret's Out (There Is None)

2025-07-05

In 2024, building autonomous coding agents was thought to require clever internal tricks. It turns out all you need is a slightly better base model. Claude Sonnet 3.7 is a frontrunner, excelling not in raw power but in its ability to persist and make good decisions. The barrier to entry for building AI coding agents has plummeted; open-source solutions are excellent, and you can even run a Codex agent for free on GitHub Actions. Competition is fierce; vendors need to focus on distribution and training better models to succeed.

(www.seangoedecke.com)
Development AI coding agents

PCIe 5.0 Bandwidth Impact on Content Creation GPUs: A Deep Dive

2025-07-05
PCIe 5.0 Bandwidth Impact on Content Creation GPUs: A Deep Dive

With PCIe 5.0 GPUs now available, the impact of bandwidth on content creation applications is a key question. Testing reveals that in DaVinci Resolve, PCIe 5.0 x16, x8, and 4.0 x16 perform similarly, but reducing bandwidth to 4.0 x4 or lower significantly impacts performance. After Effects shows less impact, while Blender and Octane rendering are virtually unaffected. LLM benchmarks show limited bandwidth effects, but multi-GPU and system RAM interplay should be considered. In summary, for content creation, running a GPU at x8 on a PCIe 5.0 motherboard is usually fine, but beware of the 4.0 x4 bandwidth limitation on lower-end motherboards.

(www.pugetsystems.com)
Development GPU Performance

A 37-Year-Old's Decade-Long Journey into Computer Science

2025-07-05

A 37-year-old teacher, after a non-linear career path, embarks on a decade-long journey into computer science. He's not a complete beginner, having built websites and possessing some web development experience. Driven by a passion for creation and supported by his wife, he aims to master API design, database building, operating systems, networking, driver development, and more. His goal isn't just a job, but to build applications like community apps, streaming devices, and educational tools, potentially even launching his own venture. This is a testament to lifelong learning and self-challenge.

(initcoder.com)
Development lifelong learning

Semcheck: Verify Code Against Specs Using LLMs

2025-07-05
Semcheck: Verify Code Against Specs Using LLMs

Semcheck is a tool that leverages large language models (LLMs) to verify that your code implementation matches its specification. Define semantic rules describing how your code should align with the specification, and Semcheck handles the comparison. Use it as a final check before committing or merging code. Semcheck supports various LLM providers, including OpenAI, Anthropic, and more, as well as local models and remote specification files. It's easy to set up and offers a rich command-line interface, making it easily integrable into CI/CD workflows. It even uses itself to verify its own specification.

(github.com)
Development code verification code specification

SIMD Functions: The Promise and Peril of Compiler Auto-Vectorization

2025-07-05
SIMD Functions: The Promise and Peril of Compiler Auto-Vectorization

This post delves into the intricacies of SIMD functions and their role in compiler auto-vectorization. SIMD functions, capable of processing multiple data points simultaneously, offer significant performance improvements. However, compiler support for SIMD functions is patchy, and the generated vectorized code can be surprisingly inefficient. The article details how to declare and define SIMD functions using OpenMP pragmas and compiler-specific attributes, analyzing the impact of different parameter types (variable, uniform, linear) on vectorization efficiency. It also covers providing custom vectorized implementations using intrinsics, handling function inlining, and navigating compiler quirks. While promising performance gains, practical application of SIMD functions presents considerable challenges.

(johnnysswlab.com)
Development
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