My colleague Sanjay Ghemawat & I have done a fair bit of performance tuning of various pieces of code. We wrote an internal Performance Hints document ~2 years ago as a way of identifying some general principles & we've recently published a version of it externally. Doc: abseil.io/fast/hints.h...

🎊 Go 1.26 Release Candidate 1 is released! 🏃‍♀️ Run it in dev! Run it in prod! File bugs! https://go.dev/issue/new 🗣 Announcement: https://groups.google.com/g/golang-announce/c/i0ei8EKtYjc/m/h0jl7InPCwAJ ⬇️ Download: https://go.dev/dl/#go1.26rc1 #golang

What's new in gopls 21: go.dev/gopls/releas... Please try it out: $ go install golang.org/x/tools/gopls@latest

Gist of Go: Concurrency is out! Learn Go concurrency from the ground up with 50 auto-tested exercises and tons of interactive examples. It's a full course + book in one. antonz.org/go-concurrency

"why i think #jj-vcs is worth your time" schpet.com/note/why-i-t...

The new chapter of my Go Concurrency book covers the scheduler and its implementation details. It's not meant to be a deep dive. But it's short, easy to understand, and will teach you more about goroutine scheduling than many other developers know. antonz.org/go-concurren...

I documented the steps and missteps I took with jj (jujutsu) getting a repo set up from scratch, initial commits made, and pushed to github. This is the intro workflow I needed, but couldn't find. www.visualmode.dev/from-zero-to...

Accepted! Go 1.26 will introduce per-state goroutine metrics: running, waiting, in syscalls, etc. Developers can use them to catch problems early without needing full traces. antonz.org/accepted/gor...

BREAKING: This is huge news, the EU's equivalent of the 🇺🇸Supreme Court's 2015 Obergefell v. Hodges ruling. 🇪🇺Court of Justice just ruled all 🇪🇺countries must recognise same-sex marriages granted in other member states. This effectively legalises gay marriage across 🇪🇺

synctest — the package introduced in Go 1.25 to make concurrency testing easier — looks deceptively simple. But don't let its innocent appearance fool you. To really understand synctest, check out the new chapter of my interactive Go Concurrency book. antonz.org/go-concurren...

Small contribution just before the Go 1.26 freeze: go.dev/cl/610815 removes the hard-coded 100ms sleep from the CPU profiler for most platforms. This will make it more efficient and unblock deeper call stacks. As a bonus, uncovered and fixed an 8 year old bug in the profiler go.dev/cl/722940 :)

My talk from GopherCon 2025 about Green Tea is up on YouTube! www.youtube.com/watch?v=gPJk...

#GopherCon 2025 - the first videos are up! @michael.express gives a great overview of how the Go garbage-collector works, and the changes in the the new design. www.youtube.com/watch?v=gPJk...

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

"By doing things voters wanted, he set unrealistic expectations. Soon, voters will expect ALL politicians to represent their interests. Then where will we be?” www.mcsweeneys.net/articles/yea...

New blog post: I'm Independently Verifying Go's Reproducible Builds: www.agwa.name/blog/post/ve...

If you have an interest in understanding garbage collection better, or in how Go's new GC works under-the-hood, I highly recommend reading @michael.express's thorough guide through Go's current and Green Tea GC.

Extremely happy to see Source Spotter, a Go Checksum Database monitor and Go toolchain reproducer by @agwa.name. These use the transparency logs we built into the Go supply chain to keep the Google-operated services honest.

Flame Graphs in Go https://lemire.me/blog/2025/10/26/flame-graphs-in-go/

I got frustrated with how GitHub Actions lets workflows with read-only permissions poison the cache of read/write workflows (!!??!?), so yesterday night I put together an Action that runs commands in a gVisor sandbox.

As professional maintainers we can invest in making our projects safer and more reliable. To that end, here's a draft of the Geomys Standard of Care. It covers general maintenance, stability & reliability, dependency management, account and CI security, vulnerability handling, licensing, and more.

Today's bug of the day has it all: ultimately caused by missing zero-initialization, bug in libc (-ish, arguably), copious use of setjmp/longjmp. I love C. github.com/ericphanson/...

To implement robust mitigations across Geomys, I did a survey of open source project compromises in 2024/2025. Three root causes dominate: phishing, control handoff, and unsafe GitHub Actions triggers. All three can be systematically avoided. words.filippo.io/compromise-s...

🥳 Go 1.25.2 and 1.24.8 are released! 📢 Announcement: https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI/m/qZN5nc-mBgAJ 📦 Download: https://go.dev/dl/#go1.25.2 #golang

jj v0.34 is out, including Gerrit upload support! github.com/jj-vcs/jj/re...

We are thrilled to announce that our NEW Large Language Model will be released on 11.18.25.

Fun little Go compiler CL merged today: go.dev/cl/706655 Uninlined generic functions have a "dict" arg, since Go generics are neither erased nor monomorphized, but instead instantiated for each "GC shape" (e.g. T=*int and T=*float64 get the same code, but T=int32 and T=int64 do not).

#jj-vcs part 1: what is it andre.arko.net/2025/09/28/j...

Go's execution tracer is a woefully underutilized tool. It contains tons of information about what is happening at any given moment that you won't get with a profile. In addition to showing flight recording capabilities, this post provides a nice example of how to use tracing to diagnose a problem.

Spotlight on @prattmic.com from the @golang.org team and his talk on on Faster Go Maps With Swiss Tables. youtu.be/aqtIM5AK9t4?... #gopherconEU #golang

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

I did a talk at the UK GopherCon last month about what my team does, and I only let my laptop fall asleep twice! www.youtube.com/watch?v=oLtq...

There is no thriving #Haskell community without its members of the LGBT community, and on that there cannot be any compromise.

😮 Support for `jj gerrit upload` has been merged, I can’t wait to try it out tomorrow! Thanks matts1 and thoughtpolice for working on this!! github.com/jj-vcs/jj/pu...

Hi folks, it’s survey time! We’d love to learn more about how you use Go and what could be improved. Share your feedback via our annual developer survey at google.qualtrics.com/jfe/form/SV_.... It should take 10 - 20 minutes to complete, and will be open through September 30. Thank you! #golang

Profile.

“A new experimental Go API for JSON” by Joe Tsai, Daniel Martí, Johan Brandhorst-Satzkorn, Roger Peppe, Chris Hines, and Damien Neil — https://go.dev/blog/jsonv2-exp #golang

Underappreciated part of JJ. It also means you reach competency faster, because you can fearlessly try new commands or new techniques without worrying about destroying work.

“jj undo can now undo multiple operations progressively by calling it repeatedly, whereas previously, running jj undo twice was previously a no-op (it only undid the last change).” 😮 It seems Christmas came early this year. github.com/jj-vcs/jj/re...

The GopherCon EU videos are online. I really enjoyed @misago.org’s about testing/synctest. But there were so many good talks, maybe watch them all? youtu.be/oIC3zhTAOsY #gopherconeu #golang

My GopherCon EU talk about Swiss Table maps is now available! youtu.be/aqtIM5AK9t4

Release Notes v2025.6 tldr: The videos are here! open.substack.com/pub/gopherco...

Heading home from #GopherCon 2025 in NYC. As usual, many people asked how to get one of the amazing Go gopher Hawaiian shirts by Renee French. I've posted the details at github.com/rsc/gophersh.... (I know one person who has made pajama pants with the pattern. Socks might be nice too.) Enjoy!

GopherCon 2025 is a wrap! Thank you very much to the organizers, staff, sponsors, the other speakers, and most importantly everyone who attended. See you next year! #gopherCon #golang

@zombiezen.com great lightning talk!

Ooh, the SIMD WIP stdlib API for #golang is ready for people to poke! From Cherry from a few minutes ago: > As of today, we've landed a preliminary version with a reasonable API coverage. You're welcome to check out the dev.simd branch and try it with your use cases. github.com/golang/go/is... 🚀

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

Here are the slides for my "What's coming to Go 1.25" talk at #GopherConUK! #golang

my favorite go 1.25 feature is whatever @thepudds.bsky.social lands