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
Assuming you're already familiar with HTTP/1, there are only three new concepts that you need to understand. Pseudo-HeadersIn HTTP/1, the first line of the request contains the request method and path. HTTP/2 replaces the request line with a series of pseudo-headers. The five pseudo-headers are easy to recognize as they're represented using a colon at the start of the name: :method - The request m
This paper details how Wi-Fi works in the United States. While most of this paper also applies to other countries, there will be subtle Wi-Fi differences supported channels, Tx power allowed, etc for other countries, for which Wikipedia has the details. Faster website navigation TIP: As you scroll through this paper, headers are 'sticky' and remain docked at the top of the web browser window. Clic
This repository contains KVM/QEMU Windows guest drivers, for both paravirtual and emulated hardware. The code builds and ships as part of the virtio-win RPM on Fedora and Red Hat Enterprise Linux, and the binaries are also available in the form of distribution-neutral ISO and VFD images. If all you want is use virtio-win in your Windows virtual machines, go to the Fedora virtIO-win documentation f
Add an option to initialize automatic variables with either a pattern or with zeroes. The default is still that automatic variables are uninitialized. Also add attributes to request uninitialized on a per-variable basis, mainly to disable initialization of large stack arrays when deemed too expensive. This isn't meant to change the semantics of C and C++. Rather, it's meant to be a last-resort whe
This tool will let you mount image files of hard drive, cd-rom or floppy, and create one or several ramdisks with various parameters. This all-in-one package includes the ImDisk Virtual Disk Driver (2.1.1), the DiscUtils library that extends the number of supported image file formats, and adds several GUIs and features. 64-bit: https://sourceforge.net/projects/imdisk-toolkit/files/20240210/ImDiskT
tlsdate: secure parasitic rdate replacement tlsdate sets the local clock by securely connecting with TLS to remote servers and extracting the remote time out of the secure handshake. Unlike ntpdate, tlsdate uses TCP, for instance connecting to a remote HTTPS or TLS enabled service, and provides some protection against adversaries that try to feed you malicious time information. On Debian GNU/Linux
An open source multi-tool for exploring and publishing data Datasette is a tool for exploring and publishing data. It helps people take data of any shape or size and publish that as an interactive, explorable website and accompanying API. Datasette is aimed at data journalists, museum curators, archivists, local governments, scientists, researchers and anyone else who has data that they wish to sh
linux syscall tracer Official repositories are at GitHub and GitLab. You can get latest binary packages from Fedora rawhide, OBS, Sisyphus. The latest officially signed release tarball can be found here. Development takes place on the mailing list (archive). Everyone is welcome to send bug reports, feature requests, comments and patches there. IRC channel: #strace@oftc. strace is released under th
WireGuard® is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography. It aims to be faster, simpler, leaner, and more useful than IPsec, while avoiding the massive headache. It intends to be considerably more performant than OpenVPN. WireGuard is designed as a general purpose VPN for running on embedded interfaces and super computers alike, fit for many different c
dest-unreach / socat socat - Multipurpose relay Abstract what: "netcat++" (extended design, new implementation) OS: AIX, BSD, Linux, Solaris e.a. (UNIX) lic: GPL2 inst: tar x...; ./configure; make; make install doc: README; socat.html, socat.1 ui: command line exa: socat TCP6-LISTEN:8080,reuseaddr,fork PROXY:proxy:www.domain.com:80 keyw: tcp, udp, ipv6, raw ip, unix-socket, pty, pipe, listen, sock
はてなアプリケーションエンジニアの id:takuya-a です。 この記事では、Microsoft の検索エンジン Bing で採用された BitFunnel アルゴリズムを紹介します。 昨年のエンジニアアドベントカレンダーでは、文字列検索のアルゴリズム全般について紹介しました（文字列アルゴリズムの学びかた - Hatena Developer Blog）。今年はそのなかでも、インデックス（索引）を使った全文検索アルゴリズムについてのお話になります。 この記事の前半は全文検索の入門にもなっていますので、検索技術になじみがない方にも楽しんでいただけるのではないでしょうか。 逆に、「そんなのもう知ってるよ！」という方は、本題である「BitFunnel アルゴリズムの詳細」から目を通していただければと思います。 この記事は、はてなエンジニア Advent Calendar 2017の21日目の
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