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

GopherCon 2025 - Advancing Go Garbage Collection with Green Tea - Michael Knyszek

YouTube video by Gopher Academy

youtube.com

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

Happy to see someone outside Google rebuild/verify Go toolchains. Thanks @agwa.name! www.agwa.name/blog/post/ve... "So far, Source Spotter has successfully reproduced every toolchain since Go 1.21.0, for every architecture and operating system. As of publication time, that's 2,672 toolchains!"

For some added fun, also see go.dev/cl/715362, wherein I discover that VPCOMPRESSQ is horrifically slow on AMD Zen 4, but only with a memory destination. And thanks to @lemire.bsky.social for writing about this, which made this much faster to track down!

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

I'd love to hear from folks about your experiences. Do you use execution tracing often. If not, is it due to lack of need, lack of documentation, missing information, tooling issues, etc?

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.

Go@golang.org · 10mo ago

“Flight Recorder in Go 1.25” by Carlos Amedee and Michael Knyszek — https://go.dev/blog/flight-recorder #golang

“Flight Recorder in Go 1.25” by Carlos Amedee and Michael Knyszek — https://go.dev/blog/flight-recorder #golang

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

Testing Time (and other asynchronous code) - Damien Neil | GopherCon EU 2025

YouTube video by GopherCon Europe

youtu.be

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

Faster Go Maps With Swiss Tables - Michael Pratt | GopherCon EU 2025

YouTube video by GopherCon Europe

youtu.be

What if Go’s garbage collector could just run faster? Join @michael.express from the Go Team for a deep dive into Green Tea — a new experimental parallel mark algorithm designed to speed up Go’s garbage collector through better cache locality and SIMD. www.gophercon.com/agenda/sessi...

Thanks @commaok.xyz for hosting @michael.express and I to talk about a fun bug in Go’s new Green Tea GC and the tools we used to investigate. sigpod.dev/6

Significant Bits | Read/Write/Nil with Michael Knyszek and Michael Pratt

Please read important erratum at end of these notes!Astute listeners will notice that this is the first episode in over a year. I recorded not one but two awesome interviews...and then failed to ed...

sigpod.dev

New experimental garbage collector for Go programs! github.com/golang/go/is...

runtime: green tea garbage collector · Issue #73581 · golang/go

Green Tea 🍵 Garbage Collector Authors: Michael Knyszek, Austin Clements Updated: 2 May 2025 This issue tracks the design and implementation of the Green Tea garbage collector. As of the last update...

github.com

How often do people run into the SetFinalizer footguns in Go? (Accidental cycle, for example.) Would a GODEBUG that does something slow but tells you when you've made a mistake be useful to you? (Maybe even just for tests, to prevent a regression?) Sketch: go-review.googlesource.com/c/go/+/634599