巨人の肩に乗る
本記事は 仮想通貨 Advent Calendar 2025 の24日目の記事です。 はじめに はじめまして、ymdと申します。普段は、株や暗号資産の分析をし、マーケットが盛り上がったときに落ちているお金を拾っています。 今年のAdvent Calendarを眺めていると、DEXの分析やLLMを活用した自動トレード戦略作成など、非常に有益な記事が目白押しです。 これらを見て思い出したのが、ニュートンの「巨人の肩に乗る」という言葉。本記事では、この精神に倣い、AIの力と先人の知見という2つの「肩」を借りながら、お金拾いの方法を探っていきます。 AIの肩に乗る AI駆動開発の3つのアプローチ AIを活用した開発には、大きく3つの方向性があります： 情報収集の自動化：論文や API ドキュメントの要約 戦略生成の自動化：複数のアプローチを並行生成 コーディングの自動化：コードそのものを AI に
【C#】マルチスレッド関連操作の詳説。 - ねののお庭。
この記事は Qiita C# Advent Calendar 2021 23日目の記事です。 マルチスレッドプログラミングにおける問題。 原子性 コンパイラによる命令の並び替え メモリバリアについて acquire / release acquire / release の取り扱いづらさ sequential consistency C# でのマルチスレッド関連操作 lock (statement) volatile (keyword) Volatile (class) Interlocked (class) Common Language Infrastructure (CLI) における volatile read / write の仕様 まとめ References この記事のお話の流れは、①マルチスレッドプログラミングで発生する問題、②それらの問題に対処するためのメモリバイアについ
TL;DR; We are changing std::sort in LLVM’s libcxx. That’s a long story of what it took us to get there and all possible consequences, bugs you might encounter with examples from open source. We provide some benchmarks, perspective, why we did this in the first place and what it cost us with exciting ideas from Hyrum’s Law to reinforcement learning. All changes went into open source and thus I can
Suppose you have an array of floating-point numbers, and wish to sum them. You might naively think you can simply add them, e.g. in Rust: fn naive_sum(arr: &[f32]) -> f32 { let mut out = 0.0; for x in arr { out += *x; } out } This however can easily result in an arbitrarily large accumulated error. Let’s try it out: naive_sum(&vec![1.0; 1_000_000]) = 1000000.0 naive_sum(&vec![1.0; 10_000_000]) = 1
I read a blog post by Alex Muscar, “Beautiful Binary Search in D“. It describes a binary search called “Shar’s algorithm”. I’d never heard of it and it’s impossible to google, but looking at the algorithm I couldn’t help but think “this is branchless.” And who knew that there could be a branchless binary search? So I did the work to translate it into a algorithm for C++ iterators, no longer requir
3/7/2023 When Zig is safer and faster than Rust There are endless debates online about Rust vs. Zig, this post explores a side of the argument I don't think is mentioned enough. Intro / TLDRλ I was intrigued to learn that the Roc language rewrote their standard library from Rust to Zig. What made Zig the better option? They wrote that they were using a lot of unsafe Rust and it was getting in thei
Cedro Español, English Cedro is a C language extension that works as a pre-processor with eight features: The backstitch macro x@ f(), g(y); → f(x); g(x, y); (related work). Deferred resource release auto ... or defer ... (related work). Break out of nested loops break label; (related work). Notation for array slices array[start..end] (related work). Block macros #define { ... #define }. Loop macr
Tier 4 Support § Support for these targets is entirely experimental. If this target is provided by LLVM, LLVM may have the target as an experimental target, which means that you need to use Zig-provided binaries for the target to be available, or build LLVM from source with special configure flags. zig targets will display the target if it is available. This target may be considered deprecated by
When people say Rust is a “safe language”, they often mean memory safety. And while memory safety is a great start, it’s far from all it takes to build robust applications. Memory safety is important but not sufficient for overall reliability. In this article, I want to show you a few common gotchas in safe Rust that the compiler doesn’t detect and how to avoid them. Why Rust Can’t Always Help Eve
JavaScript needs more helper functions for iteration (map, filter, etc.) – where should we put them?
JavaScript needs more helper functions for iteration (map, filter, etc.) – where should we put them? Iteration is a standard that connects operations with data containers: Each operation that follows this standard, can be applied to each data container that implements this standard. In this blog post: We first explore three questions: How does JavaScript’s iteration work? What are its quirks? What
Async Rust is amazing, but far from flawless. In this blog, I'll walk you through the current struggles and possible solutions. So async Rust is amazing. It makes it possible to write code that can run concurrently with other code without having to manage dozens of manually written state machines. This is great for resource use. While waiting on data on a socket, the code won't spin or block a thr
sdadams.org
The problem: data corruption I decided it was finally time to build a file server to centralize my files and guard them against bit-rot. Although I would have preferred to use OpenBSD due to its straightforward configuration and sane defaults, I was surprised to find that none of the typical NAS filesystems were supported. In particular I would need three features in such a filesystem. Firstly I w
Deno標準モジュール解説［後編］ ～モジュール解説（FS～Wasi）と、Deno標準モジュールの今後の展望 Deno標準モジュールを、前編と後編の2回に分けて解説します。本記事は後編です（前編はこちら）。 モジュール解説 前編に続き、以下ではDeno標準モジュールの中の各モジュールについて解説していきます。 11. FS FSではファイル操作用のユーティリティが実装されています。具体的には以下のような機能が提供されています。 copy：ファイルもしくはディレクトリをコピーする detect：ファイルの内容を受け取ってファイルの改行形式を判定する emptyDir：ディレクトリを空にする（ディレクトリ自体は消されない） ensureDir：ディレクトリがなければ作成する ensureFile：ファイルがなければ作成する ensureLink：ハードリンクがなければ作成する ensure
Zig; what I think after months of using it What I like Arbitrary sized-integers and packed structs Generic types are just functions at the type level Error Union Types C interop is probably the best The build system is nice What I like less Error handling Shadowing is forbidden Compile-time duck typing No typeclasses / traits comptime is probably not as interesting as it looks No encapsulation Mem
こんにちは、R&Dチームの齋藤（@aznhe21）です。 今日はオプティムの創立記念パーティーがオンラインで行われます。 オプティムは2000/6/8に設立され、去年は20周年の節目であったにも関わらず生憎の時制で大きく祝えませんでしたが、 今年は準備も万全、盛大にお祝いしたいと思います。 さて、本日、日本時間6/18(金)、Rust 1.53がリリースされました。 この記事ではRust 1.53での変更点を詳しく紹介します。 6/18は京大の前身・京都帝国大学創立の日 ピックアップ 識別子にASCII以外の文字も使えるようになった ORパターンが使えるようになった 配列にIntoIteratorが実装された 安定化されたAPIのドキュメント AtomicBool::fetch_update サンプル AtomicPtr::fetch_update サンプル BTreeMap::retai
V Language Review (2022)
V is a programming language promising to be “Simple, fast, safe, compiled. For developing maintainable software.” V has a controversial past but what is the state of V in 2022? Is V worth checking out? In this post, we’ll take a look at V as it exists in May 2022. TLDR Read the summary Rules of engagement I’ll be using the current version of V built from git which is 50ab2cfd1ae02d4f4280f38c60b8db
Is Rust faster than C?
Is Rust faster than C? Jun 9, 2025 Someone on Reddit recently asked: What would make a Rust implementation of something faster than a C implementation, all things being the same? I think this is a great and interesting question! It’s really tough because it ultimately relies on what exactly you mean by “all things being the same.” And I think this is something that makes it hard to compare languag
References are like jumps
In a high-level language, the programmer is deprived of the dangerous power to update his own program while it is running. Even more valuable, he has the power to split his machine into a number of separate variables, arrays, files, etc.; when he wishes to update any of these he must quote its name explicitly on the left of the assignment, so that the identity of the part of the machine subject to
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
Reading the excellent article by JeanHeyd Meneide on how broken string encoding in C/C++ is made me realise that Unicode is a topic that is often overlooked by a large number of developers. In my experience, there’s a lot of confusion and wrong expectations on what Unicode is, and what best practices to follow when dealing with strings that may contain characters outside of the ASCII range. This a
It is now 45+ years since C++ was first conceived. As planned, it evolved to meet challenges, but many developers use C++ as if it was still the previous millennium. This is suboptimal from the perspective of ease of expressing ideas, performance, reliability, and maintainability. Here, I present the key concepts on which performant, type safe, and flexible C++ software can be built: resource mana
Mastering Customer Segmentation with LLM | Towards Data Science
Unlock advanced customer segmentation techniques using LLMs, and improve your clustering models with advanced techniques Content Table · Intro · Data · Method 1: Kmeans · Method 2: K-Prototype · Method 3: LLM + Kmeans · Conclusion Intro A customer segmentation project can be approached in multiple ways. In this article I will teach you advanced techniques, not only to define the clusters, but to a
Rust Language Cheat Sheet 26. August 2021 Contains clickable links to The Book , Rust by Example , Std Docs , Nomicon , Reference . Data Structures Data types and memory locations defined via keywords. Example Explanation struct S {} Define a struct with named fields. struct S { x: T } Define struct with named field x of type T. struct S (T); Define "tupled" struct with numbered field .0 of type
Introduction: Density Is King (With a Tiny VM) I've previously come to the conclusion that there's little reason for using bytecode in the modern world, except in order to get more compact code, for which it can be very effective. So, what kind of a bytecode engine will give you more compact code? Suppose I want a bytecode interpreter for a very small programming environment, specifically to minim
Part of my job is to make JavaScript things go fast. Speed is a feature, and when working in an interpreted language, squeezing every last bit of performance can be the difference between a great product and unusable garbage. Anyway, how cool would it be to make JavaScript itself go faster? I’m not a C++ programmer, but that didn’t stop me before, so I thought I’d give it a try anyway! The objecti
As I've written about before, an important goal for async Rust is to support async functions everywhere, including in trait objects (dyn Trait). To this end, we are adding a new experimental type called dyn* that will give us more flexibility to support dynamic dispatch for async methods. We now have experimental support for dyn* in nightly Rust now, so we can start to kick the tires and use our e
by Drew Miller on 2026-2-12 So long and thanks for all the frames. We were moving Tritium off egui and into a more powerful UI abstraction to better access OS primitives, improve rendering and provide extension support. We were moving over to a declarative UI framework that would allow for us as a team to take Tritium to the next level. We were moving to Slint. Until we didn't. Some thoughts on wh
Large Text Compression Benchmark Matt Mahoney Last update: Mar. 25, 2026. history This competition ranks lossless data compression programs by the compressed size (including the size of the decompression program) of the first 109 bytes of the XML text dump of the English version of Wikipedia on Mar. 3, 2006. About the test data. The goal of this benchmark is not to find the best overall compress
Zig 言語リファレンス
index.md これは Zig ドキュメント 0.10.1 を DeepL Pro と ChatGPT を利用して翻訳したものです。 一部 master なモノもあります、ごちゃ混ぜです 自分用に翻訳しています zig_doc_0.10.1.md Zig 言語リファレンス はじめに Zig は、堅牢で最適かつ再利用可能なソフトウェアを維持するための汎用プログラミング言語およびツールチェインです。 ロバスト メモリ不足などのエッジケースでも正しく動作する。 最適化 プログラムが最適に動作・実行されるように記述する。 再利用可能 同じコードが、制約の異なる多くの環境で動作します。 保守性 コンパイラや他のプログラマに意図を正確に伝えることができる。コードを読むためのオーバーヘッドが少なく、要件や環境の変化に強い言語です。 新しいことを学ぶのに一番効率的な方法は例を見ることであることが多いので
Following up from the last post, there is a lot more we need to cover. This was intended to be the post where we talk exclusively about benchmarks and numbers. But, I have unfortunately been perfectly taunted and status-locked, like a monster whose “aggro” was pulled by a tank. The reason, of course, is due to a few folks taking issue with my outright dismissal of the C and C++ APIs (and not showi
Pandas is a very popular tool for data analysis. It comes built-in with many useful features, it's battle tested and widely accepted. However, pandas is not always the best tool for the job. SQL databases have been around since the 1970s. Some of the smartest people in the world worked on making it easy to slice, dice, fetch and manipulate data quickly and efficiently. SQL databases have come such
Version 12.1 of the GNU Compiler Collection (GCC) is expected to be released in April 2022. Like every major GCC release, this version will bring many additions, improvements, bug fixes, and new features. GCC 12 is already the system compiler in Fedora 36. GCC 12 will also be available on Red Hat Enterprise Linux in the Red Hat Developer Toolset (version 7) or the Red Hat GCC Toolset (version 8 an
地面を見下ろす少年の足蹴にされる私
文書の一覧 JTC1/SC22/WG21 - Papers mailing2025-12 全部で113本あります。 もくじ N5011 Brno 2026 N5029 WG21 2025-10 Kona Admin telecon minutes N5031 WG21 2025-11 Kona Minutes of Meeting N5032 Working Draft, Standard for Programming Language C++ N5033 Editors' Report - Programming Languages - C++ P1317R2 Remove return type deduction in std::apply P1789R2 Library Support for Expansion Statements P1789R3 Library Suppor
Engineering a fixed-width bit-packed Integer Vector in Rust | Luca Lombardo
If you’ve ever worked with massive datasets, you know that memory usage can quickly become a bottleneck. While developing succinct data structures, I found myself needing to store large arrays of integers—values with no monotonicity or other exploitable patterns, that I knew came from a universe much smaller than their type’s theoretical capacity. In this post, we will explore the engineering chal
I wanted to explore different ways of communicating between different processes executing on the same machine, and doing so as fast as possible. We're focussing on high speed inter-process communication (IPC), but some of these approaches can be extended across a network. We'll do this exploration in Rust. A reminder that since these are independent processes, most approaches you'd take within-pro
As of C++20, we have four keywords beginning with const. What do they all mean? Are they mostly the same? Let’s compare them in this article. const vs constexpr const, our good old fried from the early days of C++ (and also C), can be applied to objects to indicate immutability. This keyword can also be added to non-static member functions, so those functions can be called on const instances of a
Update: dolthub/swiss has been archived because Golang 1.24 made Swiss tables the default map implementation. Today's blog is announcing SwissMap, a new Golang hash table based on SwissTable that is faster and uses less memory than Golang's built-in map. We'll cover the motivation, design and implementation of this new package and give you some reasons to try it. This blog is part of our deep-dive
As part of my PhD studies, I’m working on a distributed task runtime called HyperQueue. Its goal is to provide an ergonomic and efficient way to execute task graphs on High-Performance Computing (HPC) distributed clusters, and one of its duties is to be able to spawn a large amount of Linux processes efficiently. HyperQueue is of course written in Rust1, and it uses the standard library’s Command
I write a lot of reductions: loops that combine every element from a collection in some way. For example, summing a vector of integers: (reduce (fn [sum x] (+ sum x)) 0 [1 2 3]) ; => 6 If you’re not familiar with Clojure’s reduce, it takes a reducing function f, an initial accumulator init, and a collection xs. It then invokes (f init x0) where x0 is the first element in xs. f returns a new accumu
I have an enum. It looks a bit like this: pub enum SomeEnum { A = 0, B = 1, C = 2, D = 3, } I have a number. It looks a lot like this: let number = 0b10. Turning an enum into a number is pretty simple; I can do SomeEnum::B as u8. Turning a number into an enum is considerably more difficult; number as SomeEnum won't work as number can't be constrained to only be the values of the provided enum (i.e
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Changing std::sort at Google’s Scale and Beyond
Taming Floating-Point Sums | orlp.net
Beautiful Branchless Binary Search
When Zig is safer and faster than Rust
C programming language extension: Cedro pre-processor
0.8.0 Release Notes ⚡ The Zig Programming Language
Pitfalls of Safe Rust | corrode Rust Consulting
Debloat your async Rust - Blog - Tweede golf
Deno標準モジュール解説［後編］ ～モジュール解説（FS～Wasi）と、Deno標準モジュールの今後の展望 | gihyo.jp
strongly-typed-thoughts.net
Rust 1.53を早めに深掘り - OPTiM TECH BLOG
Unicode is harder than you think · mcilloni's blog
21st Century C++ – Communications of the ACM
https://cheats.rs/rust_cheat_sheet.pdf
bytecode interpreters for tiny computers ⁑ Dercuano
I made JSON.parse() 2x faster
A Look at dyn* Code Generation
Tritium | Thanks for All the Frames: Rust GUI Observations
Large Text Compression Benchmark
cuneicode, and the Future of Text in C
Practical SQL for Data Analysis
New C++ features in GCC 12 | Red Hat Developer
IPC in Rust - a Ping Pong Comparison
const vs constexpr vs consteval vs constinit in C++20
SwissMap: A smaller, faster Golang Hash Table
Process spawning performance in Rust
Loopr: A Loop/Reduction Macro for Clojure
Rust ints to Rust enums with less instructions