Bookmarks (141)

Tim Bray's Go Diaries: Generics — Tim (one of the original co-authors of the XML spec) finds a use case for generics in his Quamima pattern matching library, only to find that there are some ‘bumps in the road’ which he shares here for everyone’s benefit.Tim concludes: “I don’t hate Go’s generics, which is actually pretty strong testimony given that I spent the best...

Calculating Type Sets Is Harder Than You Think — If you like going into the weeds of typing, this is going to be catnip to you as the author picks up on something in the generics spec and walks us through the math (and code) to show just how hard proving a type set is empty really is.

Let's Build a Distributed Postgres Proof of Concept — Could you put together a mini Postgres in 600 lines of Go? Another example of some of the complicated things you can get done with just a little bit of code in Go (even where third-party packages do much of the lifting.)

Roaring 2.0: Roaring Bitmap Data Structures in Go — Bitsets/bitmaps are useful data structures but can take up a lot of space if uncompressed. Roaring bitmaps are particularly efficient compressed bitmaps and used in systems like Lucene, ClickHouse, and Spark. If this area interests you, you may also want to check out Dgraph's Sroar which promises even more efficiency as well as their fantastic writeup...

wazero: Zero Dependency WebAssembly Runtime for Go Devs — A WebAssembly 1.0 spec compliant runtime written in Go and it doesn’t lean on cgo at all. There’s a bunch of sample projects showing off what it can do, but at the minimum you can use it to call code written in other languages (that compile to WASM) from your Go apps.

Sneller: A Vectorized SQL Engine for JSON — Designed to handle (PartiQL-enhanced) SQL queries upon terabytes of JSON without needing a schema, all at speed. Check out the example queries in the README. (Note the AGPL license.)

Cardrank: Go Types and Functions for Working with Cards, Decks, and Poker Hands — Poker is one of those words you tend to avoid in emails like this, but I imagine there are enough of you who are into the game that you’d find this interesting.

Notes on Practical Concurrency in Go — Not exactly a tutorial but a set of notes around a variety of concurrent related mechanisms in Go including mutexes, channels, patterns for distributing tasks, etc.

▶  What to Do When Projects Get Big and Messy — The Go Time podcast tackles the topic of software maintenance again. (66-minutes.)

Fx 24.0: A Command-Line JSON Processing Tool — If you’ve got some files full of JSON that you want to process, Fx will slice and dice it however you want. It was recently rewritten in Go from its original JavaScript and now supports writing reducers in JavaScript, Python or Ruby.

Changing One Character Wildly Improved Segment's App Performance — In terms of value per keypress, you can’t beat this, surely. Segment’s engineers noticed some sluggishness in a Go-powered system, used pprof to see what was going on, and discovered a tiny change to a sorting comparison function would pay huge dividends.

rqlite 7.4.0: A Distributed Relational Database Built on SQLite — 7.4.0 adds support for restoring a node from an actual SQLite file rather than an SQL dump.

OctoSQL: Join, Analyze, and Transform Data From Multiple Sources using SQL — Supported sources are CSV, JSON, MySQL, PostgreSQL, Redis and, as of this week, Parquet.

FerretDB 0.2: An In-Progress, Go-Powered MongoDB Alternative — MongoDB, you say? Yes. This is an attempt to recreate the essentials of MongoDB in Go so it could work as a drop-in replacement and it uses Postgres as the underlying database engine.

▶  How to Refactor Cloud Apps in Go 1.18 with Generics — A 20-minute talk from this week’s Google I/O event by two Googlers that introduces Go 1.18’s generics feature, how they differ to other implementations, why to use them, plus a practical demo of refactoring a Go 1.16 app. Easy to follow – a good primer.

Efficient Infrastructure with DNSimple's Terraform Provider — Use DNSimple’s Terraform provider to manage DNS like with other cloud services, update DNS records & manage DNS infrastructure. Or use the DNSimple Consul integration to automatically provision DNS records from Consul in our authoritative name servers.

How to Use go run to Manage Tool Dependencies — Did you know that since Go 1.17 you can use go run to run things in remote packages that aren’t even related to your current project/go.mod?

Of Ducks and Go Interface Misuse — It’s easy to create interfaces when reuse needs arise, but it’s also easy to create bad interfaces that make things harder for developers to use later.

Shrink Your TinyGo WebAssembly Modules by 60% — Every byte matters when you’re sending it down the wire to be run in a browser, so going from 1.1MB to 377KB in this case with the same source file was a big win.

testscript: Define Filesystem-Based Tests by Creating Scripts — Originally created for testing the Go compiler itself, testscript makes filesystem-based testing simple with just a few Unix-like commands and intuitive utilities to check test success. This post shows it off.

Go's Concurrency Examples in Java 19 — Java is about to get support for ‘virtual threads’ which are vaguely similar to goroutines, and the author of this article wanted to compare some Go examples with what the equivalent Java will be. Go certainly wins when it comes to tighter, more readable code!