~golangweekly | Bookmarks (188)

Actionlint: Static Checker for GitHub Actions Workflow Files — GitHub Actions workflow files are notoriously tricky to get right, so this could be helpful. You can also try it online via this playground.

Chapar: An In-Development API Testing Tool — Built in Go using the Gio UI library, Chapar is designed for testing both HTTP and gRPC-based APIs in a slightly Postman-like fashion. It’s still under development but is ready to try out, says the author. GitHub repo.

Reclaiming CPU for Free with PGO — We’ve previously featured Dolt’s experiences with PGO but Cloudflare has been experimenting and benefiting from Go 1.20+’s profile-guided optimization too. At Cloudflare’s scale of running Go-based services across thousands of cores, the end result is quite striking.

ok Considered Harmful? — “Just like there’s an unwritten law that every error variable in Go must be named err, there’s an unwritten law that every map existence variable in Go must be named ok.” But Zach thinks we can, and should, look at doing better.

🗣️ Do Gophers Really Tend to Build Everything From Scratch? — Over on Reddit, a developer new to Go wondered why Go has few large scale frameworks and whether we tend to just build everything from scratch. The top response sums up a typical Go approach well – we have lots of great libraries, and Go makes it easy to compose them together. Full thread.

The Notifier Pattern for Apps That Use Postgres — Brandur is a big fan of Postgres’s built-in pub/sub features.

Building a Web App with Go and React — The goal of this series seems to be to show off JetBrains’ GoLand IDE, with less focus on the design of the app itself. This does not, however, mean it’s not useful to see how the parts come together.

Create a DNS Resolver with Go — There are plenty of ways to do this quickly, but if you want to dig into the packets and learn how it works, why not?

Product for Engineers: A Newsletter Helping Flex Your Product Muscle — Subscribe to get curated advice on building great products and best practices of top startups.

How I Made My GitHub Profile README Dynamic — There’s no Go here, alas, but a neat demo of how it’s not too tricky to give your GitHub profile extra flair by pulling in blog posts or other info.

hnsw: In-Memory HNSW Vector Indexing for Go — A library providing a simple, in-memory vector database. HNSW stands for Hierarchical Navigable Small Worlds and is a way of indexing vectors by way of a multi-layer graph.

GoWrap: CLI Tool for Generating Decorators for Interfaces — Provides a variety of templates to easily add metrics, tracing, fallbacks, pools, and other features into your existing code.

Evolving the Go Standard Library with math/rand/v2 — Generating random numbers takes much more than you might think. Go’s initial RNG has multiple flaws, but fixing it breaks repeatability requirements. So, the core team created a “version 2” package that keeps Go’s compatibility promise and sets forth principles for future such 'version 2' packages generally.

Secure Randomness in Go 1.22 — If you’re interested in how randomness has improved in Go recently, this is for you, as the authors dive more into the security requirements of some use cases, how Go was enabling insecure code, and how doing the ChaCha(Rand8) led to not only better, faster, more secure random number generation but also how “Go 1.22 makes your programs...

Borgo: A New Language That Compiles to Go — People on Hacker News got very excited about this! Borgo’s authors aim to create a language “more expressive than Go but less complex than Rust.” The result is more type safety and it's certainly worth a look.

Using Structs for Generic Argument Lists — The example compares running a new algorithm vs an old one, and comparing the results to ensure they have the same answer. Think of it as feature flags for testing refactorings, and how using structs + generics cleans the code up.

An Applied Introduction to EBPF with Go — We’ve linked to stories about eBPF a few times, and this article goes through the basics and two examples of using eBPF to measure resources, such as tracking packets.

Nimble Terminal Charts: Charting for Bubble Tea — Provides a way to render bar, line, scatter, time series, and other charts with Bubble Tea. Lots of examples here.

v8go: Execute JavaScript from Go via V8 — If this feels familiar, it’s a fork of this main v8go project, but adding support for Android, newer versions of V8, JS symbols, and more.

mactop: A Terminal Based Monitoring Tool for Apple Silicon — A Mac-specific htop-a-like that shows off real-time CPU and GPU usage, along with metrics about power and memory usage.

Logdy: A Web-Based Viewer for Logs — Web based real-time log viewer. Stream any content to a web UI with autogenerated filters, then parse any format with TypeScript. Live demo.

Sonic: A Newly Open Sourced Low Latency Network and I/O Library — Not to be confused with the eponymous blogging tool or JSON library, this Sonic is an asynchronous network and I/O library for Go, newly open sourced by a company specializing in trading infrastructure. “Sonic is an alternative to the net package. It removes the need to use multiple goroutines to handle multiple connections...

Tokens for LLMs: Byte Pair Encoding in Go — Tokens are fundamental to LLMs, so understanding how they’re encoded and decoded can help you better understand how LLMs work too.

The Two Reasons I Prefer Passing Struct Pointers Around — When passing structs to functions, how do you decide whether or not to use a pointer? Preslav has some solid criteria inspired by the principles of domain-driven design that may give you a new, more maintainable approach.