🇺🇦 Go performance channel

Package archsimd provides access to architecture-specific SIMD operations.
This is a low-level package that exposes hardware-specific functionality. It currently supports AMD64.

This package is experimental, and not subject to the #golang

pkg.go.dev/simd/archsim...

$ go install golang.org/dl/go1.25.5@latest $ go1.25.5 download Downloaded 0.0% ( 0 / 57815527 bytes) ... Downloaded 50.0% (28907763 / 57815527 bytes) ... Downloaded 100.0% (57815527 / 57815527 bytes) Unpacking go1.25.5.openbsd-riscv64.tar.gz ... Success. You may now run 'go1.25.5' $ go1.25.5 version go version go1.25.5 openbsd/riscv64

🥳 Go 1.25.5 and 1.24.11 are released!

🔐 Security: Includes security fixes for crypto/x509 (CVE-2025-61729, CVE-2025-61727).

🗣 Announcement: https://groups.google.com/g/golang-announce/c/8FJoBkPddm4/m/kYpVlPw1CQAJ

📦 Download: https://go.dev/dl/#go1.25.5

#golang

strconv: replace Ryu ftoa with Dragonbox

The new implementation has been fuzz-tested against the current
Ryu implementation in addition to the existing test suite.
Benchmarks show at least ~15-20% performance improvement.

go-review.googlesource.com/c/go/+/700075 #golang

“Go’s Sweet 16” by Austin Clements, for the Go team — https://go.dev/blog/16years

#golang

“The Green Tea Garbage Collector” by Michael Knyszek and Austin Clements — https://go.dev/blog/greenteagc

#golang

Memory Allocation in Go Memory Allocation in Go

Memory Allocation in #golang

nghiant3223.github.io/2025/06/03/m...

Swiss Maps in Go - Bryan Boreham YouTube video by GopherCon UK

Video is up now - my take on how map is implemented in Go, and what changed from Go 1.23 to 1.24 and 1.25.

youtu.be/M05t7Q6LbFs

Making `DecodeRuneInString` is inlinable #golang

github.com/golang/go/is...

proposal: simd: architecture-specific SIMD intrinsics under a GOEXPERIMENT · Issue #73787 · golang/go Update (08/20/2025): A preliminary implementation of AMD64 low-level SIMD package is being developed on the dev.simd branch. You're welcome to check it out and try it with your use cases. Feedback ...

proposal: simd: architecture-specific SIMD intrinsics under a GOEXPERIMENT #golang

github.com/golang/go/is...

🔥🔥🔥 #golang github.com/golang/go/is...

“Container-aware GOMAXPROCS” by Michael Pratt and Carlos Amedee — https://go.dev/blog/container-aware-gomaxprocs

#golang

$ go install golang.org/dl/go1.25.0@latest $ go1.25.0 download Downloaded 0.0% ( 0 / 58130695 bytes) ... Downloaded 50.0% (29065347 / 58130695 bytes) ... Downloaded 100.0% (58130695 / 58130695 bytes) Unpacking go1.25.0.freebsd-arm.tar.gz ... Success. You may now run 'go1.25.0' $ go1.25.0 version go version go1.25.0 freebsd/arm

🎊 Go 1.25.0 is released!

📝 Release notes: https://go.dev/doc/go1.25

⬇️ Download: https://go.dev/dl/#go1.25.0

#golang

How Go 1.24's Swiss Tables saved us hundreds of gigabytes | Datadog Go 1.24's Swiss Tables cut our map memory usage by up to 70% in high-traffic workloads. Here's how we profiled the savings and improved performance.

How Go 1.24's Swiss Tables saved us hundreds of gigabytes
#golang www.datadoghq.com/blog/enginee...

How to store Go pointers from assembly The standard Go toolchain comes with an assembler out of the box. Said assembler is highly idiosyncratic, using syntax inherited from Plan 9 and choosing its own names for platform-specific instructio...

How to store Go pointers from assembly mazzo.li/posts/go-asm... #golang

GitHub - jordanlewis/gcassert: Assert your Go code is inlined and bounds-check eliminated Assert your Go code is inlined and bounds-check eliminated - jordanlewis/gcassert

Assert your #golang code is inlined and bounds-check eliminated

github.com/jordanlewis/...

Golang sync.Pool is not a silver bullet A deep dive into Go's sync.Pool, its benefits, pitfalls, and when to use it (or not)

Golang sync.Pool is not a silver bullet

wundergraph.com/blog/golang-... #golang

proposal: runtime: CPU limit-aware GOMAXPROCS default · Issue #73193 · golang/go Overview Change the Go runtime on Linux to use CPU cgroup quota limits to set the default value of GOMAXPROCS. This is a concrete proposal for the ideas discussed in #33803. I've included a lot of ...

proposal: runtime: CPU limit-aware GOMAXPROCS default #golang

github.com/golang/go/is... by @prattmic.com

More predictable benchmarking with testing.B.Loop - The Go Programming Language Better benchmark looping in Go 1.24.

More predictable benchmarking with testing.B.Loop #golang go.dev/blog/testing...

🎊 Go 1.24.2 and 1.23.8 are released!

🔐 Security: Includes a security fix for net/http (CVE-2025-22871).

📣 Announcement: groups.google.com/g/golang-ann...

📦 Download: go.dev/dl/#go1.24.2

#golang

func mult(a, b float64) float64 { return a * b } func Benchmark1(b *testing.B) { for i := 0; i < b.N; i++ { mult(3.0, 5.0) } } func Benchmark2(b *testing.B) { for range b.N { mult(3.0, 5.0) } } func Benchmark3(b *testing.B) { for b.Loop() { mult(3.0, 5.0) } }

This is important: is the new Go 1.24 benchmark loop syntax making my code 7x slower, and why?
#golang

Diagnostics - The Go Programming Language

Diagnostics wiki go.dev/doc/diagnost... #golang

Faster interpreters in Go: Catching up with C++ — PlanetScale A novel technique for implementing dynamic language interpreters in Go, applied to the Vitess SQL evaluation engine

Faster interpreters in Go: Catching up with C++

planetscale.com/blog/faster-... #golang

cmd/compile: slow escape analysis in large package in the typescript compiler · Issue #72815 · golang/go Go version go version go1.24.1 linux/amd64 Output of go env in your module/workspace: AR='ar' CC='gcc' CGO_CFLAGS='-O2 -g' CGO_CPPFLAGS='' CGO_CXXFLAGS='-O2 -g' CGO_ENABLED='1' CGO_FFLAGS='-O2 -g' ...

Awesome work by @thepudds.bsky.social github.com/golang/go/is...

Compiling the typescript compiler went from 70s to 30s !

Pres Mihaylov on X: "Someone on the Go team decided to take a "quick stab" at fixing a small bug in Go's escape analysis, resulting in a 5x increase in typescript performance. Why Go you ask? https://t.co/ez7sD590zg" / X Someone on the Go team decided to take a "quick stab" at fixing a small bug in Go's escape analysis, resulting in a 5x increase in typescript performance. Why Go you ask? https://t.co/ez7sD590zg

Someone on the Go team decided to take a "quick stab" at fixing a small bug in Go's escape analysis, resulting in a 5x increase in typescript performance.

Why Go you ask? #golang

x.com/PreslavMihay...

link to the issue github.com/golang/go/is...

From unique to cleanups and weak: new low-level tools for efficiency - The Go Programming Language Weak pointers and better finalization in Go 1.24.

From unique to cleanups and weak: new low-level tools for efficiency

go.dev/blog/cleanup... #golang

🎉 Go 1.24.1 and 1.23.7 are released!

🔐 Security: Includes a security fix for net/http (CVE-2025-22870)

🗣 Announcement: groups.google.com/g/golang-ann...

🗃 Download: go.dev/dl/#go1.24.1

#golang

Faster Go maps with Swiss Tables - The Go Programming Language Go 1.24 improves map performance with a brand new map implementation

"Faster Go maps with Swiss Tables" by Michael Pratt — go.dev/blog/swissta...

#golang

cmd/compile: poor spill decisions making code 14% slower · Issue #71868 · golang/go At commit 266b0cf from earlier today (but also with some older toolchains, not claiming the behavior is new), suppose you: GOOS=linux GOARCH=amd64 go test -c math/big go tool objdump -s big.nat.sca...

cmd/compile: poor spill decisions making code 14% slower

github.com/golang/go/is...

#golang

Go 1.24 Release Notes - The Go Programming Language

🧨 Go 1.24.0 is released!

📝 Release notes: go.dev/doc/go1.24

⬇️ Download: go.dev/dl/#go1.24.0

#golang

design: add 54805-go-dynamic-tls.md by amusman · Pull Request #56 · golang/proposal design: add 54805-go-dynamic-tls.md

Proposal: Go general dynamic TLS (Thread Local Storage)

github.com/golang/propo... #golang