reflect: add Value.Caller
Read on GitHub reflect.Call allocates a []reflect.Value slice of length nout for the number of return arguments from the function. This is fine for a one-off call of
Issue #99
reflect.Value.Caller accepted to cut Call's return-slice allocation
The reflect package picks up Value.Caller, an accepted proposal aimed at the allocation reflect.Call does for its return-value slice on every invocation, which matters for anyone leaning on reflection in a hot path. Alongside it, a separate proposal to add maps.Grow is under discussion, filling in the obvious gap next to slices.Grow. On the lighter side, there is a writeup on faking a permanent green dot in Microsoft Teams from Go, which is exactly the sort of thing a Wednesday deserves.
Thursday, September 24, 2026 · Issue #99
🐿️ reflect.Value.Caller accepted to cut Call's return-slice allocation
The reflect package picks up Value.Caller, an accepted proposal aimed at the allocation reflect.Call does for its return-value slice on every invocation, which matters for anyone leaning on reflection in a hot path. Alongside it, a separate proposal to add maps.Grow is under discussion, filling in the obvious gap next to slices.Grow. On the lighter side, there is a writeup on faking a permanent green dot in Microsoft Teams from Go, which is exactly the sort of thing a Wednesday deserves.
Accepted Proposals 1
Proposals 2
proposal: maps: add Grow
Read on GitHub Proposal Details Add to package maps : go // Grow increases m's capacity, if necessary, so that at least n more // entries can be added without furthe
proposal: go/types: add Func.RecvBase method
Read on GitHub @ianlancetaylor recently pointed out that third-party analyzer writes often need to copy a number of widely used helper internal functions from x/tool
Discussions 4
go-astiav: FFMpeg and libav C bindings are now compatible with ffmpeg n9.0
Read on Reddit Golang ffmpeg and libav C bindings. Contribute to asticode/go-astiav development by creating an account on GitHub.
json/v2: slice nil checks considered harmful?
Read on Reddit Noticing after upgrading to json/v2 with the default unmarshal, all of my slice checks (!= nil or == nil) are either invalid (unmarshal gives me empty slices now) or redundant. I've been replacing all
AlpineJudge - A code judge engine made entirely with Go and containerd for easy deployment
Read on Reddit A lightweight, stateless code execution engine with secure sandboxing and horizontal scalability. - smsadat1/AlpineJudge
Articles 5
The best decision in Go’s new collections proposal is one underscore
Read on Medium There is a /v2 on the end of my module path and it is nobody's fault but mine. Continue reading on Medium »
SQLite in Go: WAL, Locking & Production Patterns
Read on Medium SQLite works remarkably well inside a Go service when the connection pool respects its locking model. This guide compares current drivers… Continue reading on Code Your Own Path »
TaskFlow: Building a Production-Oriented Backend System with Go
Read on Medium While learning Go, I wanted to build something beyond a traditional CRUD application. Continue reading on Medium »
We Profiled Before Optimizing. The Bottleneck Was Nowhere We Guessed
Read on Medium A py-spy and pprof war story, and the measure–fix–measure loop that ended our guessing Continue reading on Medium »
Why your nav health check slowed down as the menu grew
Read on Medium It worked in dev · Episode 5 · technique: returning two facts from one pass Continue reading on Level Up Coding »
Videos 5
Go tip: Return values & short params #shorts
Read on YouTube Return values & short params — a quick Go (Golang) tip from Day 9 of our free Learn Go in 30 Days course. ▷ Full lesson: ...
Resolving Blocking Issues with Golang c-shared Dynamic Libraries in PostgreSQL Background Workers
Read on YouTube Learn how to properly integrate Go-generated C shared libraries with PostgreSQL background workers to avoid blocking issues ...
Go tip: Wrap errors with %w #shorts
Read on YouTube Wrap errors with %w — a quick Go (Golang) tip from Day 17 of our free Learn Go in 30 Days course. ▷ Full lesson: ...
Go tip: Goroutines + WaitGroup #shorts
Read on YouTube Goroutines + WaitGroup — a quick Go (Golang) tip from Day 20 of our free Learn Go in 30 Days course. ▷ Full lesson: ...
Go tip: POST handler: 201 Created #shorts
Read on YouTube POST handler: 201 Created — a quick Go (Golang) tip from Day 28 of our free Learn Go in 30 Days course. ▷ Full lesson: ...
Trending 3
Add durable-go to workflow libraries list (#6707)
Read on Awesome Go Added durable-go to the list of workflow libraries.
add github.com/jbunds/coverage to the "Testing Frameworks" section (#6708)
Read on Awesome Go despite not being a framework, per se, there is precedent for the tool to be added to the "Testing Frameworks" section: - go-carpet - go-test-coverage
Jobs 2
Prenosis · Sr. Software Engineer
Read on Golangprojects Remote - Prenosis Inc. is an artificial intelligence company pioneering precision medicine in acute care. Our Immunix™ precision medicine platform drives the development of precision products and en
