Lightnews — Scholar-powered news

thepudds @thepudds.bsky.social · 9d

(SMP support a ~couple months ago, the gvisor network stack running under UEFI more recently, ...)

bsky.app/profile/andr...

Andrea Barisani @andreabarisani.bsky.social · 25d

Screw PXE, this means the entire Go TLS and networking stack is available under UEFI.

In seconds I added DHCP and an SSH server to remotely manage my pre-boot environments.

I see much potential.

Andrea Barisani @andreabarisani.bsky.social · 25d

Adding networking to go-boot through UEFI Simple Network Protocol.

It took 77 LOCs of pure Go to add the UEFI driver and bridge it to gVisor stack.

thepudds @thepudds.bsky.social · 9d

@andreabarisani.bsky.social is the author of the new-ish proposal for bare metal support for Go, which seems to be gathering some momentum AFAICT.

Andrea continues to share some fairly exciting progress... 🚀

( #golang proposal: github.com/golang/go/is... )

Andrea Barisani @andreabarisani.bsky.social · 9d

First ever boot of a TamaGo unikernel in the cloud, here on Google Cloud Compute Engine, automatically deployed from remote userspace!

Looking forward to polish and publish this.

1 2

Reposted by thepudds

Jake Bailey @jakebailey.dev · 10d

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).

1 4 19

Reposted by thepudds

Steve Klabnik @steveklabnik.com · 12d

Stupid #jj-vcs tricks

andre.arko.net/2025/09/28/s...

stupid jj tricks

This post was originally given as a talk for JJ Con. The slides are also available. Welcome to “stupid jj tricks”. Today, I’ll be taking you on a tour through many different jj configurations that I h...

andre.arko.net

1 7 49

Reposted by thepudds

Patrick Walton @pcwalton.bsky.social · 12d

OK, I love this. tl;dr using knowledge of your allocator, speed up linked list traversal by adding a branch that guesses where the next linked list element is and pre-populates the "next" variable to eliminate stalls if the allocations are well-behaved.

miguelraz_t @movraxrax.bsky.social · 13d

15/n This horrible one is for @eikopf.com
mazzo.li/posts/value-...

Beating the L1 cache with value speculation

mazzo.li

2 31

Reposted by thepudds

Michael Pratt @prattmic.com · 14d

If you haven't been keeping up, Go 1.21 reduced overhead from ~10% to ~1%. 1.22 overhauled the format to improve reliability and add information. 1.25 has a built in trace flight recorder. And we have an active proposal (go.dev/issue/62627) for a trace parsing package to enable arbitrary tooling.

proposal: x/debug/trace: add package for parsing execution traces · Issue #62627 · golang/go

As part of #60773 (tracking issue #57175) I've been working on a new parser for the execution tracer, and to save work down the line I've also been trying to come up with a nice API that would work...

go.dev

1 3 12

Reposted by thepudds

Michael Pratt @prattmic.com · 14d

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 · 14d

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

#golang

1 9 30

Reposted by thepudds

Kemal Akkoyun @kakkoyun.me · 17d

I recently spoke at GopherCon UK 2025 about the hidden power of #Go’s `-toolexec` flag. How it can turn every `go build` into a programmable pipeline for things like error-handling enforcement and observability hooks. Here’s the recording:

Unleashing the Go Toolchain - Kemal Akkoyun

The -toolexec flag hides a super-power in the Go toolchain: it lets you turn every go build into a programmable pipeline. In this session we’ll reveal how a simple wrapper command can inject custom…

youtu.be

2 7

Reposted by thepudds

Bryan Boreham @bboreham.bsky.social · 22d

My talk from #gopherconuk is up on YouTube!
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

* Talk contains no AI, but does contain pictures of cats.

Swiss Maps in Go - Bryan Boreham

YouTube video by GopherCon UK

youtu.be

2 8

Reposted by thepudds

Josh Bleecher Snyder @commaok.xyz · 24d

New blog post: Security through intentional redundancy

commaok.xyz/post/securit...

Security through intentional redundancy

When writing a service, it’s very easy to accidentally forget to check permissions or ownership of an object. This code has a gaping security hole in it: func (s *Server) deletePhoto(w http.ResponseWr...

commaok.xyz

2 6

Reposted by thepudds

Andrea Barisani @andreabarisani.bsky.social · 25d

Screw PXE, this means the entire Go TLS and networking stack is available under UEFI.

In seconds I added DHCP and an SSH server to remotely manage my pre-boot environments.

I see much potential.

Andrea Barisani @andreabarisani.bsky.social · 25d

Adding networking to go-boot through UEFI Simple Network Protocol.

It took 77 LOCs of pure Go to add the UEFI driver and bridge it to gVisor stack.

9 45

Reposted by thepudds

Dave Cheney @dave.cheney.net · Sep 9

This talk is like the solstice, it appears twice a year :)

1 5

Reposted by thepudds

Konrad Reiche @konradreiche.com · Sep 3

I've been eager to get more context and commentary on those slides. Fortunately, @dave.cheney.net gave the talk again at GopherCon Europe 2025, and the recording is now live! www.youtube.com/watch?v=RZe8...

1 2 6

Reposted by thepudds

Michael Pratt @prattmic.com · Sep 1

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

1 9 26

thepudds @thepudds.bsky.social · Aug 20

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...

🚀

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 ...

github.com

5 18

Reposted by thepudds

Daniel Lemire @lemire.bsky.social · Aug 15

Predictable memory accesses are much faster https://lemire.me/blog/2025/08/15/predictable-memory-accesses-are-much-faster/

2 15

Reposted by thepudds

Daniel Martí @mvdan.cc · Aug 14

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

#golang

What's coming in Go 1.25

What's coming in Go 1.25 GopherCon UK, 2025 - Daniel Martí @mvdan.cc

docs.google.com

1 16 43

Reposted by thepudds

Frederic Branczyk @brancz.com · Aug 13

Such an awesome feature! Catch a heap profile just before your Go process is just about to be killed by the OOM killer. (truly hooking into the kernel's OOMkiller with eBPF!)

Polar Signals @polarsignals.com · Aug 13

Tame the OOM killer with OOMProf, the new eBPF memory profiler for Go programs being taken out by the kernels OOM killer!
www.polarsignals.com/blog/posts/2...

OOMProf - Profiling on the Brink

Using eBPF to record your programs dying breathes

www.polarsignals.com

2 11

Reposted by thepudds

Roxy Light @zombiezen.com · Aug 13

I'm so excited to be giving a lightning talk at #Gophercon! Come see me talk way too fast about programming language nerdery. www.gophercon.com/agenda/sessi...

GopherCon 2025

Join us in New York City from August 26th - 28th at the North Javits Center for GopherCon 2025! As the premiere gathering of Go programming language enthusiasts, you can expect some of the very best p...

www.gophercon.com

1 5

thepudds @thepudds.bsky.social · Aug 12

Classic. 😅

Nice to see the traditions honored.

1 2

Reposted by thepudds

Michael Pratt @prattmic.com · Aug 12

Go 1.25 is the best release of Go yet!

Go @golang.org · Aug 12

🎊 Go 1.25.0 is released!

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

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

#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

1 1 20

Reposted by thepudds

Go @golang.org · Aug 12

🎊 Go 1.25.0 is released!

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

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

#golang

4 56 190

Reposted by thepudds

Klaus Post @klauspost.com · Aug 11

Excellent blog post about hooking up Go into Java for erasure coding:

kohlschuetter.github.io/blog/posts/2...

Faster Reed-Solomon Erasure Coding in Java with Go & FFM

Backblaze’s Java-based Reed-Solomon Erasure Coding library is great tech, but comparatively slow. Let’s add some optimized Go, and get a whopping speedup.

kohlschuetter.github.io

3 8

thepudds @thepudds.bsky.social · Aug 7

I'm happy to share that my talk proposal was accepted for GopherCon in NYC!

It's on the Go compiler & escape analysis.

I hope to chat with you there. Yes, you!

(And if we don't know each other yet, just introduce yourself, and then we can chat! 😅)

#golang #gophercon

GopherCon @gophercon.com · Aug 5

Why is your code allocating memory? How does the Go compiler see the world?

Join Go contributor @thepudds.bsky.social for a deep dive into escape analysis—the part of the compiler that decides whether your data stays on the stack or takes the more expensive trip to the heap.

🎟️ www.gophercon.com

4 3 23

Reposted by thepudds

Alan Donovan @adonovan.bsky.social · Jul 28

Gopls v0.20.0 is released: go.dev/gopls/releas...
$ go install golang.org/x/tools/[email protected]
Docs at go.dev/gopls.
Thanks to all who contributed!

Gopls release v0.20.0 - The Go Programming Language

go.dev

1 6 13