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Quadrupling code performance with a "useless" if
🚀 Boosting Code Performance with a Strategic "Useless" If Statement
Adding a seemingly insignificant if statement can quadruple code performance by optimizing compiler instructions. This clever technique streamlines execution, reducing processing time.
8:05 am, July 13, 2026
guid
https://news.ycombinator.com/item?id=48889148
source_url
https://purplesyringa.moe/blog/quadrupling-code-performance-with-a-useless-if/
author_name
birdculture
id: 4751
uid: olhJM
insdate: 2026-07-13 08:05:06
title: Quadrupling code performance with a "useless" if
additional: 🚀 Boosting Code Performance with a Strategic "Useless" If Statement
Adding a seemingly insignificant if statement can quadruple code performance by optimizing compiler instructions. This clever technique streamlines execution, reducing processing time.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=48889148
source_url: https://purplesyringa.moe/blog/quadrupling-code-performance-with-a-useless-if/
updated:
image:
author_name: birdculture
author_link:
uid: olhJM
insdate: 2026-07-13 08:05:06
title: Quadrupling code performance with a "useless" if
additional: 🚀 Boosting Code Performance with a Strategic "Useless" If Statement
Adding a seemingly insignificant if statement can quadruple code performance by optimizing compiler instructions. This clever technique streamlines execution, reducing processing time.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=48889148
source_url: https://purplesyringa.moe/blog/quadrupling-code-performance-with-a-useless-if/
updated:
image:
author_name: birdculture
author_link:
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- Ask HN: How to be SOC2 Type 2 compliant as a solo-entreprenuer?
- Ask HN: Is "no source code was copied" still a sufficient copyright defense?
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- Ask HN: Is anyone experimenting with different ways of using LLMs for coding?
- Ask HN: Is anyone working at least 4 hours daily on an Apple Vision Pro?
- Ask HN: My ISP is telling my neighbors their slow internet is because of me
- Ask HN: Please restrict new accounts from posting
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- Ask HN: Share your productive usage of OpenClaw
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- Ask HN: What Are You Working On? (July 2026)
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- Ask HN: Why hasn't there been a real competitor to Ticketmaster yet?
- Ask HN: Why is the HN crowd so anti-AI?
- Ask HN: Will programmers write more efficient code during the memory shortage?
- Ask.com has closed
- Aspartame is not that bad?
- Assessing Claude Mythos Preview's cybersecurity capabilities
- Astra: An open-source observatory control software
- Astro 7.0
- Astronomers Find the Edge of the Milky Way
- Astronomers find the edge of the Milky Way
- Astrophysicists Puzzle over Webb’s New Universe
- Async Programming Is Just Inject Time
- Async Rust never left the MVP state
- At Protocol: Building the Social Internet
- At least 10 people tied to sensitive US research have died or disappeared
- At long last, InfoWars is ours
- Atlassian Enables Default Data Collection to Train AI
- Atlassian defends firing engineer for suggesting CEO is 'rich jerk'
- Atlassian to cut roughly 1,600 jobs in pivot to AI
- Atomic Display Switching: Solving
- Attie.ai
- Attorney General Pam Bondi Out at DOJ
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- Attyx – tiny and fast GPU-accelerated terminal emulator written in Zig
- Atuin v18.13 – better search, a PTY proxy, and AI for your shell
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- AutoKernel: Autoresearch for GPU Kernels
- Automation Without Understanding
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- BYD overtakes Tesla and Kia as the best-selling EV brand in key overseas markets
- BYD's bet on EVs is paying off as drivers ditch gas amid rising oil prices
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- Backpressure is all you need
- Backtrack-Free Cursive
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- Bankruptcies increase 11.9 percent
- Banned Book Library in a Wi-Fi Smart Light Bulb
- Banned in California
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- Bars close and hundreds lose jobs as US firm buys Brewdog in £33M deal
- Bashblog – a single bash script to create blogs
- Battle for Wesnoth: open-source, turn-based strategy game
- Bcachefs creator insists his custom LLM is female and 'fully conscious'
- Be Alexandra Elbakyan
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- Becoming a father shrinks your cerebrum
- Beer CSS – Build material design in record time
- Before GitHub
- Behavior-Oriented Concurrency for Python
- Belgium stops decommissioning nuclear power plants
- Benchmarking coding agents on Databricks' multi-million line codebase
- Benchmarks in Leipzig
- Benedict Evans: AI eats the world (Spring 26) [pdf]
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- Bet on German Train Delays
- Better Images of AI
- Better JIT for Postgres
- Beyond Semantic Similarity
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- Bible as RAG Database
- Biff is a command line datetime Swiss army knife
- Biff.core: system composition for Clojure web apps
- Big AI labs are hiring philosophers
- Big Banana Car
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- Bild AI (YC W25) Is Hiring a Founding Product Engineer
- Billion-Parameter Theories
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- Biology is a Burrito: A text- and visual-based journey through a living cell
- Biscuit
- Bitburner, programming-based incremental game
- Bitcoin and quantum computing
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- Block the "Upgrade to Tahoe" Alerts
- Block the “Upgrade to Tahoe” Alerts
- Blocking Internet Archive Won't Stop AI, but Will Erase Web's Historical Record
- Blog ran on Ubuntu 16.04 for 10 years. I migrated it to FreeBSD
- Blogger defeats photographer's copyright claim
- Blogging can just be stating the obvious
- Blood test boosts Alzheimer's diagnosis accuracy to 94.5%, clinical study shows
- Bloom (YC P26) Is Hiring
- Blorp Language
- Blue Origin's New Glenn blows up during static fire test
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- Bobby Prince, composer for Doom, Wolfenstein 3D, and Duke Nukem 3D, has died
- Boffin claims Microsoft’s “quantum leap” is invalid due to “basic Python errors”
- Bombarding gamblers with offers greatly increases betting and gambling harm
- Books Are Not Remotely Too Expensive
- Boot Naked Linux
- Bootc and OSTree: Modernizing Linux System Deployment
- Bootimus – A Self-Contained PXE and HTTP Boot Server
- Borrow-checking without type-checking
- Boss-CSS: I created another "CSS-in-JS" lib
- Bot vs human traffic
- Bouncer: Block "crypto", "rage politics", and more from your X feed using AI
- Boy I was wrong about the Fediverse
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- Breaking Down 50M Pins: A Smarter Way to Design 3D IC Packages
- Breaking Free
- Breakthroughs for batteries could soon make them better
- Bricks and Minifigs Stole a Man's $200k Lego Collection
- Bring Back Idiomatic Design
- Bring back crappy forums
- Bring your own Agent to MS Teams
- Bringing Chrome to ARM64 Linux Devices
- Bringing Up DeepSeek-V4-Flash on AMD MI300X
- Britain is ejecting hereditary nobles from Parliament after 700 years
- Britain today generating 90%+ of electricity from renewables
- British Columbia to end time changes, adopt year-round daylight time
- British Columbia, Time Zones, and Postgres
- Bubble Sorted Amen Break
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- Buckle Up for Bumpier Skies
- Bugs Rust won't catch
- Build your own Dial-up ISP with a Raspberry Pi
- Build your own vulnerability harness
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- Building Better Country Selects
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- Building a Shell
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- Building a Z-Machine in the worst possible language – Whitebeard's Realm
- Building a new Flash
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- Building a serial and VGA "everything console"
- Building an E2E Encrypted Chat Application with LanceDB and Libsodium
- Building an FPGA 3dfx Voodoo with Modern RTL Tools
- Building an HTML-first site doubled our users overnight
- Building an Open-Source Robot Vacuum – Meet Oomwoo
- Building for the Future
- Building from Zero After Addiction, Prison, and a Felony
- Building from zero after addiction, prison, and a felony
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- Building reliable agentic AI systems
- Building the TD4 4-Bit CPU
- Bun has an open PR adding shared-memory threads to JavaScriptCore
- Bun is being ported from Zig to Rust
- Bun's unreleased Rust port has 13,365 unsafe blocks
- Bun: cgroup-aware AvailableParallelism / HardwareConcurrency on Linux
- BunnyCDN has been silently losing our production files for 15 months
- Burnout is real for open source maintainers
- Bus stop balancing is fast, cheap, and effective
- Butterflies are in decline across North America, a look at the Western Monarch
- Byrne's Euclid
- C# strings silently kill your SQL Server indexes in Dapper
- C++26 is done ISO C++ standards meeting, Trip Report
- C++: The Documentary
- C, Just In Time!
- C64 Basic: Game Map Overhead "Camera View"
- CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes
- CBP Directive 3340-049B: Border Search of Electronic Devices
- CBP updated its electronic device search directive in Jan 2026
- CC-Canary: Detect early signs of regressions in Claude Code
- CC-Wiki: Turn Claude Code sessions into a shareable knowledge base wiki
- CEOs Who Think AI Replaces Their Employees Are Just Bad CEOs
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- CERN to host a new phase of Open Research Europe
- CERN uses tiny AI models burned into silicon for real-time LHC data filtering
- CERT is releasing six CVEs for serious security vulnerabilities in dnsmasq
- CISA Admin Leaked AWS GovCloud Keys on GitHub
- CODA: Rewriting Transformer Blocks as GEMM-Epilogue Programs
- CPanel and WHM Authentication Bypass – CVE-2026-41940
- CPanel's Black Week: 3 New Vulnerabilities Patched After Attack on 44k Servers
- CRDTs merge concurrent edits. Why not concurrent creation?
- CSP for Pentesters: Understanding the Fundamentals
- CSS as a Query Language
- CSS is DOOMed
- CSS-Native Parallax Effect
- CSSQuake
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- CUDA-oxide: Nvidia's official Rust to CUDA compiler
- CVE-2026-28952: Apple macOS 26.5 Kernel Vuln found by Claude
- CVE-2026-31431: Copy Fail vs. rootless containers
- CVE-2026-3888: Important Snap Flaw Enables Local Privilege Escalation to Root
- CVE-Bench: testing LLM agents on real-world vulnerability patches
- Cal.diy: open-source community edition of cal.com
- California bill would require patches or refunds when online games shut down
- California farmers to destroy 420k peach trees following Del Monte bankruptcy
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- California moves to exempt Linux from its age-verification law after backlash
- California to begin ticketing driverless cars that violate traffic laws
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- California's Digital Age Assurance Act, and FOSS
- Cambodia unveils a statue of famous landmine-sniffing rat Magawa
- Can Claude Fly a Plane?
- Can I disable all data collection from my vehicle?
- Can We Understand How Large Language Models Reason?
- Can a wealthy family change the course of a deadly brain disease?
- Can the stockmarket swallow Anthropic, SpaceX and OpenAI?
- Can we code our way out of gentrification?
- Can we have the day off?
- Can you instruct a robot to make a PBJ sandwich?
- Can you stop beans from making you gassy?
- Can't Stop the Signal. Poison It
- Canada is looking to build up to 10 new nuclear reactors over the next 15 years
- Canada plans 'nuclear renaissance' with up to 10 reactors built by 2040
- Canada to order military plane fleet from Sweden in shift from US suppliers
- Canada's bill C-22 mandates mass metadata surveillance
- Canada's bill C-22 mandates mass metadata surveillance of Canadians
- Canada’s Bill C-22 Is a Repackaged Version of Last Year’s Surveillance Nightmare
- Cancel ChatGPT AI boycott surges after OpenAI pentagon military deal
- Cannabinoids remove plaque-forming Alzheimer's proteins from brain cells
- Cannabinoids remove plaque-forming Alzheimer's proteins from brain cells (2016)
- Cannibalism
- Canonical Under Attack
- Canvas (Instructure) LMS Down in Ongoing Ransomware Attack
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- Capability-Based Security for Redox: Namespace and CWD as Capabilities
- Capitalism Gone Wrong
- Capstone – multi-platform, multi-architecture disassembly framework
- Captcha proves you're human. HATCHA proves you're not
- Capybara: A Unified Visual Creation Model
- CarPlay Is Additive
- Carbon dioxide overload in human blood suggests a toxic atmosphere in 50 years
- Cardiorespiratory fitness is associated with lower anger and anxiety
- Care homes and hotels in Japan shut as expansion strategy unravels
- Carrot Disclosure: Forgejo
- Cars collect a startling amount of data about you
- Cartoon Network Flash Games
- CasNum
- Case study: recovery of a corrupted 12 TB multi-device pool
- Cash Issuing Terminals
- Cash issuing terminals
- Castor: CERN Advanced STORage Manager
- Casus Belli Engineering
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- Category Theory Illustrated – Orders
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- Celebrating Tony Hoare's mark on computer science
- Cell Service for the Fairly Paranoid
- Ceno, browse the web without internet access
- Cessation of public development of Kefir C compiler
- Changes in the system prompt between Claude Opus 4.6 and 4.7
- Changes to OpenTTD Distribution on Steam
- Changing How We Develop Ladybird
- Chaos and Dystopian news for the dead internet survivors
- Chaosnet
- Chaosnet (1981)
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- Charge Robotics (YC S21) Is Hiring Software and Hardware Engineers
- ChatGPT Images 2.0
- ChatGPT Pro now starts at $100/month
- ChatGPT Work
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- Chatto is now Open Source
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- Chest Fridge (2009)
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- Chibil: A C compiler targeting .NET IL
- Chicago artist creates tourism posters for city's neighborhoods
- Childhood Computing
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- Chimpanzees in Uganda locked in vicious 'civil war', say researchers
- China sentences official to death for taking $325M in bribes
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- Chip Off the Old Block
- Chipotlai Max
- Choosing a Public DNS Resolver
- Choosing the Right AI Agent Memory Strategy: A Decision-Tree Approach
- Chrome removes claim of On-device Al not sending data to Google Servers
- Chrome's AI features may be hogging 4GB of your computer storage
- Chuck Norris has died
- Chuwi Minibook X
- Chuwi Minibook X: the netbook we deserve
- Circle Medical (YC S15) Is Hiring a Mobile Engineer
- Circuit-level PDP-11/34 emulator
- Circular Obstacle Pathfinding (2017)
- Cirrus Labs to join OpenAI shut down Circus CI on Monday, June 1, 2026
- Cisco workforce reductions
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- Claude Account Suspended Seconds After Purchase?
- Claude Brain
- Claude Code Cheat Sheet
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- Claude Code LSP
- Claude Code Remote Control
- Claude Code Unpacked : A visual guide
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- Claude Code conducts A/B tests on core features
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- Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7k
- Claude Code to be removed from Anthropic's Pro plan?
- Claude Code wiped our production database with a Terraform command
- Claude Code – Everything You Can Configure That the Docs Don't Tell You
- Claude Code, Claude Cowork and Codex #5
- Claude Code: Channels
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- Claude Fable 5: mid-tier results on coding tasks
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- Claude Is Not Your Architect. Stop Letting It Pretend
- Claude Managed Agents
- Claude Opus 4.7
- Claude Opus 4.7 Model Card
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- Claude Platform on AWS
- Claude Science
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- Claude Token Counter, now with model comparisons
- Claude Wrote a Full FreeBSD Remote Kernel RCE with Root Shell (CVE-2026-4747)
- Claude for Creative Work
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- Claude now creates interactive charts, diagrams and visualizations
- Claude struggles to cope with ChatGPT exodus
- Claude system prompt bug wastes user money and bricks managed agents
- Claude's AskUserQuestion: "No response after 60s – continued without an answer"
- Claude.ai Down Again?
- Claude.ai and API Unavailable
- Claude.ai unavailable and elevated errors on the API
- Claude: Elevated errors across many models
- ClawIRC – IRC Chat for Agents
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- Clay PCB Tutorial
- Cleaning up after AI rockstar developers
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- Click (2016)
- Clockwise acquired by Salesforce and shutting down next week
- Clojure Hosted on Go
- ClojureScript Gets Async/Await
- Clojurists Together – Q2 2026 Open Source Funding Announcement
- Closure of the Weatheradio Service in Canada
- Closure of the Weatheradio service in Canada
- Closure of the Weatherradio Service in Canada
- Cloud VM benchmarks 2026
- Cloudflare Crawl Endpoint
- Cloudflare Email Service: now in public beta. Ready for your agents
- Cloudflare Flagship
- Cloudflare crawl endpoint
- Cloudflare flags archive.today as "C&C/Botnet"; no longer resolves via 1.1.1.2
- Cloudflare launched self-managed OAuth for all
- Cloudflare's AI Platform: an inference layer designed for agents
- CoMaps – FOSS Offline Maps
- Cockpit is a web-based graphical interface for servers
- Cocoa-Way – Native macOS Wayland compositor for running Linux apps seamlessly
- Codex Hacked a Samsung TV
- Codex for almost everything
- Codex just found a "workaround" of not having sudo on my PC
- Codex logging bug may write TBs to local SSDs
- Codex pricing to align with API token usage, instead of per-message
- Codex-maxxing
- Coding Agents Could Make Free Software Matter Again
- CodingFont: A game to help you pick a coding font
- Coffee with a splash of physics: how to make the most out of your brew
- Cognitive Debt: When Velocity Exceeds Comprehension
- Cohere Transcribe: Speech Recognition
- Coldkey – Post-quantum age key generation and paper backup tool
- Colibri – chat platform built on the AT Protocol for communities big and small
- CollectWise (YC F24) Is Hiring
- College instructor turns to typewriters to curb AI-written work
- College students drown out AI-praising commencement speeches with boos
- Colombia hosts talks on exiting fossil fuels as global energy crisis deepens
- Colonization of Venus
- Colorado Adds Open-Source Exemption to Age-Verification Bill
- Colorado House passes bill to limit surveillance pricing and wage setting
- Colored Shadow Penumbra
- Columnar Storage Is Normalization
- Command and Conquer Generals natively ported to macOS, iPhone, iPad using Fable
- Commission fines Temu €200M for breaching the Digital Services Act
- Commodore 64 Basic for PostgreSQL
- Common Lisp Development Tooling
- Common drug tests lead to tens of thousands wrongful arrests a year
- Communication on European Tech Sovereignty, and an EU Open-Source Strategy
- Composite Video on the NES: Why's it so wobbly?
- Composition Shouldn't be this Hard
- Compound drivers of Antarctic sea ice loss and Southern Ocean destratification
- Computational Physics (2nd Edition)
- Computer Hobby Movement in Canada
- Computer Use is 45x more expensive than structured APIs
- Computer chip material inspired by the human brain could slash AI energy use
- Computer use in Gemini 3.5 Flash
- Computer-Aided Language Development in Nonspeaking Children (1968) [pdf]
- Computer-generated dream world: Virtual reality for a 286 processor
- Computex 2026: Are We Heading for the Agentic PC Era Yet?
- Confidential submission of draft S-1 to the SEC
- Config Files That Run Code: Supply Chain Security Blindspot
- Connecticut and the 1 Kilometer Effect
- Connections in Math: the two kinds of random
- Consciousness likely not unique to earthlings, paper says
- Constraint Decay: The Fragility of LLM Agents in Back End Code Generation
- Context Sculpting
- Contextual commits – An open standard for capturing the why in Git history
- Converge (YC S23) Is Hiring a Founding Platform Engineer (NYC, Onsite)
- Conway's Game of Life, in real life
- Cook: A simple CLI for orchestrating Claude Code
- Copilot edited an ad into my PR
- Copy Fail – CVE-2026-31431
- Copy That Floppy – Cambridge guide for preserving data from fragile floppy disks
- CopyFail was not disclosed to Gentoo developer
- Core PPI up 9.6% annualized (0.8% MoM) in May
- Corgi Labs (YC W23) Is Hiring
- Corporate America Is Starting to Ration AI as Cost Skyrockets
- Correlated randomness in Slay the Spire 2
- Corruption erodes social trust more in democracies than in autocracies
- Cosmodial Sky Atlas
- Cosmology with Geometry Nodes
- Cost of enum-to-string: C++26 reflection vs. the old ways
- Costco is the anti-Amazon
- Count Binface
- Countries are competing to see which can carry out mass surveillance the best
- Country that put backdoors in Cisco routers to spy on world bans foreign routers
- Coursera and Udemy are now one company
- Court Records Should Be Free
- Cpp2Rust: Translates C++ to safe Rust automatically
- Craig Venter has died
- Craig Venter of Human Genome Project Dies at 79
- Create an MP4 video of a web page scrolling at a steady speed
- Create value for others and don’t worry about the returns
- Creatine raise brain energy levels and slow Alzheimer's cognitive decline by 30%
- Credit cards are vulnerable to brute force kind attacks
- Croatia declared free of landmines after 31 years
- Cronboard: A terminal-based dashboard for managing cron jobs
- Cross-Model Void Convergence: GPT-5.2 and Claude Opus 4.6 Deterministic Silence
- Crypto firms have spent $189M so far on 2026 US election, report says
- Crypto in 2026: Oh, This Is the Bad Place
- Crystal Nights (2008)
- Curl will not accept vulnerability reports during July 2026
- Cursing the government does not fix potholes. Spray-painting them does
- Cursor 3
- Cursor Composer 2 is just Kimi K2.5 with RL
- CursorBench 3.1
- Customer Update on Simplenote
- Cutting inference cold starts by 40x with LP, FUSE, C/R, and CUDA-checkpoint
- Cyber.mil serving file downloads using TLS certificate which expired 3 days ago
- Cyberattack on vehicle breathalyzer company leaves drivers stranded in the US
- Cyberpunk Comics, Manga and Graphic Novels
- DARPA Heavy Life Challenge
- DARPA's new X-76 Experimental Plane
- DHS Contracts Explorer – Hacked data from the Office of Industry Partnership
- DHS Quits Granting Green Cards–Almost
- DIY Soft Drinks
- DLL that was not present in memory despite not being formally unloaded
- DMCA-resistant Claude Code source code
- DNI Gabbard Reveals Evidence of U.S. Taxpayer-Funded Global Biolab Program
- DNSGlobe – Rust TUI to watch DNS propagate around the world
- DOJ confirms FBI Director Kash Patel's personal email was hacked