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@jboner
jboner / latency.txt
Last active June 30, 2026 03:13
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD
@arianvp
arianvp / SSH_MACOS_SECURE_ENCLAVES.md
Last active June 30, 2026 03:11
Native Secure Enclaved backed ssh keys on MacOS

Native Secure Enclave backed ssh keys on MacOS

It turns out that MacOS Tahoe can generate and use secure-enclave backed SSH keys! This replaces projects like https://github.com/maxgoedjen/secretive

There is a shared library /usr/lib/ssh-keychain.dylib that traditionally has been used to add smartcard support to ssh by implementing PKCS11Provider interface. However since recently it also implements SecurityKeyProivder which supports loading keys directly from the secure enclave! SecurityKeyProvider is what is normally used to talk to FIDO2 devices (e.g. libfido2 can be used to talk to your Yubikey). However you can now use it to talk to your Secure Enclave instead!

@karpathy
karpathy / llm-wiki.md
Created April 4, 2026 16:25
llm-wiki

LLM Wiki

A pattern for building personal knowledge bases using LLMs.

This is an idea file, it is designed to be copy pasted to your own LLM Agent (e.g. OpenAI Codex, Claude Code, OpenCode / Pi, or etc.). Its goal is to communicate the high level idea, but your agent will build out the specifics in collaboration with you.

The core idea

Most people's experience with LLMs and documents looks like RAG: you upload a collection of files, the LLM retrieves relevant chunks at query time, and generates an answer. This works, but the LLM is rediscovering knowledge from scratch on every question. There's no accumulation. Ask a subtle question that requires synthesizing five documents, and the LLM has to find and piece together the relevant fragments every time. Nothing is built up. NotebookLM, ChatGPT file uploads, and most RAG systems work this way.

@k16shikano
k16shikano / SKILL.md
Last active June 30, 2026 03:09
japanese-tech-writing/SKILL
name japanese-tech-writing
description 日本語の技術文書・書籍原稿の文章規範。整形（一文一行、引用ブロック、脚注、コラム記法）、段落と論証の構成（パラグラフライティング）、論証の厳密さ（ツッコミどころの除去）、読み手の負荷の管理、視点と語り、演出の抑制、LLM っぽい空句の禁止、冗長の排除を定める。日本語で技術書の章、草稿、記事、解説文を書くとき、または推敲・リライトするときに使用する。

日本語技術文書の文章規範

日本語で技術的な原稿（書籍の章、記事、解説文）を書く・推敲するときは、以下の規範に従う。

整形

@diego3g
diego3g / settings.json
Last active June 30, 2026 03:09
VSCode Settings (Updated)
{
"workbench.startupEditor": "newUntitledFile",
"editor.fontSize": 16,
"editor.lineHeight": 1.8,
"javascript.suggest.autoImports": true,
"javascript.updateImportsOnFileMove.enabled": "always",
"editor.rulers": [
80,
120
],
@bradtraversy
bradtraversy / terminal-commands.md
Last active June 30, 2026 03:08
Common Terminal Commands

Common Terminal Commands

Key Commands & Navigation

Before we look at some common commands, I just want to note a few keyboard commands that are very helpful:

  • Up Arrow: Will show your last command
  • Down Arrow: Will show your next command
  • Tab: Will auto-complete your command
  • Ctrl + L: Will clear the screen
@docularxu
docularxu / blog-claude-code-china-zh.md
Last active June 30, 2026 02:52
在中国使用 Claude Code 解决 403 错误 - 完整指南（中文版）

在中国使用 Claude Code 解决 403 错误 - 完整指南（中文版）

在中国使用 Claude Code 解决 403 错误

2026 年 2 月 12 日

如果你在中国尝试使用 Claude Code，大概率会撞上 403 错误。本文覆盖三种使用场景的解决方案：

  • macOS 终端 (shell) - 在终端里直接使用 claude 命令行
  • VS Code 终端 - 在 VS Code 内置终端里使用 claude 命令行