技術部の笹田（ko1）と遠藤（mame）です。クックパッドで Ruby (MRI: Matz Ruby Implementation、いわゆる ruby コマンド) の開発をしています。お金をもらって Ruby を開発しているのでプロの Ruby コミッタです。 昨日 12/25 に、恒例のクリスマスリリースとして、Ruby 3.2.0 がリリースされました（Ruby 3.2.0 リリース）。今年も Ruby 3.2 の NEWS.md ファイルの解説をします。NEWS ファイルとは何か、は以前の記事を見てください。 プロと読み解く Ruby 2.6 NEWS ファイル - クックパッド開発者ブログ プロと読み解くRuby 2.7 NEWS - クックパッド開発者ブログ プロと読み解くRuby 3.0 NEWS - クックパッド開発者ブログ プロと読み解く Ruby 3.1 NEWS -
プロと読み解くRuby 3.4 NEWS テクノロジー部門技術基盤グループの笹田（ko1）と遠藤（mame）です。Ruby (MRI: Matz Ruby Implementation、いわゆる ruby コマンド) の開発をしています。お金をもらって Ruby を開発しているのでプロの Ruby コミッタです。 本日 12/25 に、恒例のクリスマスリリースとして、Ruby 3.4.0 がリリースされました（Ruby 3.4.0 リリース ）。今年も STORES Product Blog にて Ruby 3.4 の NEWS.md ファイルの解説をします（ちなみに、STORES Advent Calendar 2024 の記事になります。他も読んでね）。NEWS ファイルとは何か、は以前の記事を見てください。 プロと読み解く Ruby 2.6 NEWS ファイル - クックパッド開発者
GitHub - modelcontextprotocol/servers: Model Context Protocol Servers
Official integrations are maintained by companies building production ready MCP servers for their platforms. 21st.dev Magic - Create crafted UI components inspired by the best 21st.dev design engineers. 2slides - An MCP server that provides tools to convert content into slides/PPT/presentation or generate slides/PPT/presentation with user intention. ActionKit by Paragon - Connect to 130+ SaaS inte
プロと読み解くRuby 4.0 NEWS テクノロジー部門技術推進グループの笹田（ko1）と遠藤（mame）です。Ruby (MRI: Matz Ruby Implementation、いわゆる ruby コマンド) の開発をしています。お金をもらって Ruby を開発しているのでプロの Ruby コミッタです。 本日 12/25 に、恒例のクリスマスリリースとして、Ruby 4.0.0 がリリースされました（Ruby 4.0.0 リリース | Ruby）。今年も STORES Product Blog にて Ruby 4.0 の NEWS.md ファイルの解説をします（ちなみに、STORES Advent Calendar 2025 の記事になります。他も読んでね）。NEWS ファイルとは何か、は以前の記事を見てください。 プロと読み解く Ruby 2.6 NEWS ファイル - クック
I’ve been meaning to write a post about my perspective on Open Source and corporate entities. I already got the rough outline of it; however, I’m suffering from writer’s block, but more importantly, the whole post is a praise of how Shopify engages with Open Source communities. Hence, given the current climate, I don’t think I could publish it without addressing the elephant in the room first anyw
Rustで実装するLinuxカーネル（アセンブリ言語編）
「安全よりもスリルを！」 メモリ安全性のために、LinuxカーネルモジュールはRustで実装すべし、と世間に大声で訴えているけれど、本当はちょっと物足りない…危険に惹かれてしまう、そういう秘めた自分の気持ち、大切にしたいですよね！ 今回は、いかなる安全性も保証しないアセンブリ言語とRustを組み合わせて、Linuxカーネルの機能を実装してみました。 アセンブリ言語？「アセンブリ言語、何それ？」と思ったデジタルネイティブ世代の読者も大勢いることでしょう。CやRustのような高級プログラミング言語では、人間が理解しやすい型や構文などを使った記述形式をコンパイラを使って、CPUが実行できる形式へと翻訳します。一方、アセンブリ言語では、CPUが実行できる形式に限りなく近い記述形式を使います。自分の気持ちをインスタやLINEのメッセージで伝えるのは難しいですよね？アセンブリ言語はCPUへ直接気持ちを
The first Asahi Linux Alpha Release is here! - Asahi Linux
It’s been a long while since we updated the blog! Truth be told, we wanted to write a couple more progress reports, but there was always “one more thing”… So, instead, we decided to take the plunge and publish the first public alpha release of the Asahi Linux reference distribution! We’re really excited to finally take this step and start bringing Linux on Apple Silicon to everyone. This is only t
Published Feb 05, 2026 We tasked Opus 4.6 using agent teams to build a C Compiler, and then (mostly) walked away. Here's what it taught us about the future of autonomous software development. Written by Nicholas Carlini, a researcher on our Safeguards team. I've been experimenting with a new approach to supervising language models that we’re calling "agent teams." With agent teams, multiple Claude
Hello everyone, Asahi Lina here!✨ marcan asked me to write an article about the M1 GPU, so here we are~! It’s been a long road over the past few months and there’s a lot to cover, so I hope you enjoy it! What’s a GPU?You probably know what a GPU is, but do you know how they work under the hood? Let’s take a look! Almost all modern GPUs have the same main components: A bunch of shader cores, which
Assessing Claude Mythos Preview’s cybersecurity capabilities April 7, 2026 Nicholas Carlini, Newton Cheng, Keane Lucas, Michael Moore, Milad Nasr, Vinay Prabhushankar, Winnie Xiao Hakeem Angulu, Evyatar Ben Asher, Jackie Bow, Keir Bradwell, Ben Buchanan, David Forsythe, Daniel Freeman, Alex Gaynor, Xinyang Ge, Logan Graham, Kyla Guru, Hasnain Lakhani, Matt McNiece, Mojtaba Mehrara, Renee Nichol, A
I'm about to share a lengthy tale that begins with Apache OpenDAL™ op.read() and concludes with an unexpected twist. This journey was quite enlightening for me, and I hope it will be for you too. I'll do my best to recreate the experience, complete with the lessons I've learned along the way. Let's dive in! All the code snippets and scripts are available in Xuanwo/when-i-find-rust-is-slow TL;DR Ju
No-Panic Rust: A Nice Technique for Systems Programming
Can Rust replace C? This is a question that has been on my mind for many years, as I created and now am tech lead for upb, a C library for Protocol Buffers. There is an understandable push to bring memory safety to all parts of the software stack, and this would suggest a port of upb to Rust. While I love the premise of Rust, I have long been skeptical that a port of upb to Rust could preserve the
Join a VS Code Dev Days event near you to learn about AI-assisted development in VS Code. Update 1.67.1: The update addresses this security issue. Update 1.67.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the April 2022 release of Visual Studio Code. There are many updates in this version that we hope
Version 1.108 is now available! Read about the new features and fixes from December. Release date: June 12, 2025 Security update: The following extension has security updates: ms-python.python. Update 1.101.1: The update addresses these issues. Update 1.101.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome t
Motivation# Around 20% of Firefox’s HTTP traffic today uses HTTP/3, which runs over QUIC, which in turn runs over UDP. This translates to substantial UDP I/O activity. Firefox uses NSPR for most of its network I/O. When it comes to UDP I/O, NSPR only offers a limited set of dated APIs, most relevant here PR_SendTo and PR_RecvFrom, wrappers around POSIX’s sendto and recvfrom. The N in NSPR stands f
Since I was unable to travel for a couple of years during the pandemic, I decided to take my new-found time and really lean into Rust. After writing over 100k lines of Rust code, I think I am starting to get a feel for the language and like every cranky engineer I have developed opinions and because this is the Internet I’m going to share them. The reason I learned Rust was to flesh out parts of t
Making *MaNy* threads on Ruby Koichi Sasada Cookpad Inc. ko1@cookpad.com 1 RubyKaigi 2022 MaNy Project • Goal: Make MANY threads (> 100K) • Support massive network concurrent connections • HTTP/2, WebSocket, GRPC, … • Like Go, Erlang, … • Lightweight Ractor creation • Many actors like Erlang • Technique: M:N threads • M native threads (M is about nproc) and N (> 100K) Ruby threads • Current: 1:1 m
How a simple Linux kernel memory corruption bug can lead to complete system compromise
In this case, reallocating the object as one of those three types didn't seem to me like a nice way forward (although it should be possible to exploit this somehow with some effort, e.g. by using count.counter to corrupt the buf field of seq_file). Also, some systems might be using the slab_nomerge kernel command line flag, which disables this merging behavior. Another approach that I didn't look
Linux kernel bug can let hackers escape Kubernetes containers
HomeNewsSecurityLinux kernel bug can let hackers escape Kubernetes containers A vulnerability affecting Linux kernel and tracked as CVE-2022-0185 can be used to escape containers in Kubernetes, giving access to resources on the host system. Security researchers warn that exploiting this security issue is easier and more promising than initially estimated, and that patching is an urgent matter sinc
Eyes Above The Waves Robert O'Callahan. Christian. Repatriate Kiwi. Hacker. Archive 2025 June Not Joking About AI Building A PC April Rakiura Northwest Circuit February Tongariro Northern Circuit 2025 January Pararaha Valley 2025 2024 December Mt Arthur/Tablelands/Cobb Valley November Queen Charlotte Track 2024 October Auckland Half Marathon 2024 Advanced Debugging Technology In Practice June Waih
Linux 6.8 Network Optimizations Can Boost TCP Performance For Many Concurrent Connections By ~40% - Phoronix
Linux 6.8 Network Optimizations Can Boost TCP Performance For Many Concurrent Connections By ~40% Written by Michael Larabel in Linux Networking on 9 January 2024 at 02:23 PM EST. 76 Comments Beyond the usual new wired/wireless network hardware support and the other routine churn in the big Linux networking subsystem, the Linux 6.8 kernel is bringing some key improvements to the core networking co
In preparation for our upcoming release of Wasmtime 1.0 on September 20, we have prepared two blog posts describing the work we have put into the compiler and runtime recently. This first post will describe performance-related projects: making the compiler generate faster code, making the compiler itself run faster, making Wasmtime instantiate a compiled module faster, and making Wasmtime’s runtim
11th March 2025 Online discussions about using Large Language Models to help write code inevitably produce comments from developers who’s experiences have been disappointing. They often ask what they’re doing wrong—how come some people are reporting such great results when their own experiments have proved lacking? Using LLMs to write code is difficult and unintuitive. It takes significant effort
We officially launched 1Password for Linux today! 🎉 What makes this release even more amazing is it was created from scratch and developed using new languages and techniques most of our team never used before. Almost everything you can name we did in a new way: from team organization, programming languages and toolkits, design language and processes, all the way through to new deployment and pack
Posted by Felix Wilhelm, Project Zero Introduction KVM (for Kernel-based Virtual Machine) is the de-facto standard hypervisor for Linux-based cloud environments. Outside of Azure, almost all large-scale cloud and hosting providers are running on top of KVM, turning it into one of the fundamental security boundaries in the cloud. In this blog post I describe a vulnerability in KVM’s AMD-specific co
After almost three years since the initial design document and hundreds of CLs in the meantime, the V8 Sandbox — a lightweight, in-process sandbox for V8 — has now progressed to the point where it is no longer considered an experimental security feature. Starting today, the V8 Sandbox is included in Chrome's Vulnerability Reward Program (VRP). While there are still a number of issues to resolve be
Jun 19, 2024 Why I am not yet ready to switch to Zig from Rust I am not going to lie: I love programming in C. I know it’s a little bit irrational, but programming in C just feels right. Perhaps that’s because I did spend a lot of time programming with C as I contributed to the Linux kernel. Those were good times because I had the opportunity to learn from some of the best C programmers in the wor
Introduction Some part of me has always been fascinated with coercing code to run in weird places. I scratch this itch a lot with my security research projects. These often lead me to writing shellcode to run in kernels or embedded hardware, sometimes with the only way being through an existing bug. For those not familiar, shellcode is honestly hard to describe. I don’t know if there’s a very form
Trivia About Rust Types: An (Authorized) Transcription of Jon Gjengset's Twitter Thread
Preface (by Jimmy Hartzell) I am a huge fan of Jon Gjengset’s Rust for Rustaceans, an excellent book to bridge the gap between beginner Rust programming skills and becoming a fully-functional member of the Rust community. He’s famous for his YouTube channel as well; I’ve heard good things about it (watching video instruction isn’t really my thing personally). I have also greatly enjoyed his Twitte
How to modernize C arrays for greater memory safety: a case-study in refactoring the Linux kernel and a look to the future Kees Cook C is not just a fancy assembler any more Large projects written in C, especially those written close to the hardware layer like Linux, have long treated the language as a high-level assembler. Using C allowed for abstracting away much of the difficulty of writing dir
Ubuntu Announces Official Support For The PolarFire SoC FPGA Icicle Kit RISC-V Board - Phoronix
Ubuntu Announces Official Support For The PolarFire SoC FPGA Icicle Kit RISC-V Board Written by Michael Larabel in Ubuntu on 8 March 2023 at 10:45 AM EST. 5 Comments Following work bringing Ubuntu Linux to the RISC-V boards like the StarFive VisionFive 2, LicheeRV, Nezha, and others, Canonical today announced they have published an optimized RISC-V image for the Microchip PolarFire SoC FPGA powere
Update 1.87.1: The update addresses these issues. Update 1.87.2: The update addresses this security issue. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the February 2024 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: Voice dictation in editor - Use your
Exactly ten years ago today, we published "Why We Created Julia", introducing the Julia project to the world. At this point, we have moved well past the ambitious goals set out in the original blog post. Julia is now used by hundreds of thousands of people. It is taught at hundreds of universities and entire companies are being formed that build their software stacks on Julia. From personalized me
AV1 is an increasingly important video format and it needs a memory safe, high performance decoder. We worked with the team at Immunant to develop rav1d. Performance is critical in this context, so we've asked Stephen Crane, CTO of Immunant, to explain their efforts in achieving performance parity. If you'd like to dig deeper, check out our recent blog post about how we ported the C AV1 decoder to
Rust for Secure IoT Applications: Why C Is Getting Rusty
www.embedded-world.eu Rust for Secure IoT Applications Why C Is Getting Rusty Mario Noseda, Fabian Frei, Andreas Rüst, Simon Künzli Zurich University of Applied Sciences (ZHAW) Institute of Embedded Systems (InES) Winterthur, Switzerland mario.noseda@zhaw.ch, fabian.frei@zhaw.ch, andreas.ruest@zhaw.ch, simon.kuenzli@zhaw.ch Abstract— Memory corruption is still the most used type of exploit in toda
Hermit: Deterministic Linux for Controlled Testing and Software Bug-finding
Hermit: Deterministic Linux for Controlled Testing and Software Bug-finding If you've used emulators for older platforms, you probably experienced a level of precise control over software execution that we lack on contemporary platforms. For example, if you play 8-bit video games emulated on your modern console, you are able to suspend and rewind gameplay, and when you resume, that incoming creatu
Safer Usage Of C++
Safer Usage Of C++ This document is PUBLIC. Chromium committers can comment on the original doc. If you want to comment but can’t, ping palmer@. Thanks for reading! Google-internal short link: go/safer-cpp Authors/Editors: adetaylor, palmer Contributors: ajgo, danakj, davidben, dcheng, dmitrig, enh, jannh, jdoerrie, joenotcharles, kcc, markbrand, mmoroz, mpdenton, pkasting, rsesek, tsepez, awhalle
In April 2026, Canonical disclosed 44 CVEs in uutils, the Rust reimplementation of GNU coreutils that ships by default since 25.10. Most of them came out of an external audit commissioned ahead of the 26.04 LTS. I read through the list and thought there’s a lot to learn from it. What’s notable is that all of these bugs landed in a production Rust codebase, written by people who knew what they were
Unsafe Rust Is Harder Than C
Or: The Most Expensive Linked List I’ve Ever Written Some of you already know the contents of this post, especially if you’ve written embedded or unsafe code in Rust. But I didn’t, so I thought it was useful to write down my experience as accurately as I can. Without further ado… Last year, I wrote Photohash, software to help me index my NAS and find duplicate photos with rotation-independent hash
Journey to libbpf 1.0
Libbpf 1.0 release is here! It has been a pretty long journey to get to libbpf 1.0, so to commemorate this event I decided to write a post that would highlight main features and API changes (especially breaking ones) and show large amount of work done by libbpf community that went into improved usability and robustness of libbpf 1.0. The idea to clean up and future-proof and shed some organically
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
プロと読み解く Ruby 3.2 NEWS - クックパッド開発者ブログ
プロと読み解くRuby 3.4 NEWS - STORES Product Blog
プロと読み解くRuby 4.0 NEWS - STORES Product Blog
Dear Rubyists: Shopify Isn’t Your Enemy
Building a C compiler with a team of parallel Claudes
Tales of the M1 GPU - Asahi Linux
Claude Mythos Preview \ red.anthropic.com
Rust std fs slower than Python!? No, it's hardware!
April 2022 (version 1.67)
May 2025 (version 1.101)
Fast UDP I/O for Firefox in Rust
Rust: A Critical Retrospective « bunnie's blog
Making *MaNy* threads on Ruby
So You Want To Build A Browser Engine
Wasmtime 1.0: A Look at Performance
Here’s how I use LLMs to help me write code
Behind the scenes of 1Password for Linux
An EPYC escape: Case-study of a KVM breakout
The V8 Sandbox · V8
Why I am not yet ready to switch to Zig from Rust
Rust on MIPS64 Windows NT 4.0
Bounded Flexible Arrays in C
February 2024 (version 1.87)
Why We Use Julia, 10 Years Later
Optimizing rav1d, an AV1 Decoder in Rust
Bugs Rust Won't Catch | corrode Rust Consulting