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matt.godbolt.org
Matt Godbolt
@matt.godbolt.org
3.7K followers 680 following 880 posts
Sometime verb, real person, lover of 8-bit computers, husband & father, trying to be a kind person. #blacklivesmatter; trans rights are human rights.
he/him
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matt.godbolt.org
Sounds like something @aresluna.org might have some clues about - any ideas?
lauriewired.bsky.social LaurieWired @lauriewired.bsky.social · 10h
Before the IBM standardization, it get’s murky.



There’s a German teletype machine with the backslash symbol from 1937…but no one really knows what it was used for.
November 11, 2025 at 10:27 PM
Reposted by Matt Godbolt
bgrueskin.bsky.social
Kyle Kingsbury is not a journalist. He is not an op-ed writer.

He is a computer safety researcher.

And he has written one of the most compelling, comprehensive accounts of the ongoing hell in Chicago that you could possibly imagine.

In under 1600 words.

aphyr.com/posts/397-i-...
I Want You to Understand Chicago Politics Chicago 2025-11-08 I want you to understand what it is like to live in Chicago during this time. Every day my phone buzzes. It is a neighborhood group: four people were kidnapped at the corner drugstore. A friend a mile away sends a Slack message: she was at the scene when masked men assaulted and abducted two people on the street. A plumber working on my pipes is distraught, and I find out that two of his employees were kidnapped that morning. A week later it happens again. An email arrives. Agents with guns have chased a teacher into the school where she works. They did not have a warrant. They dragged her away, ignoring her and her colleagues’ pleas to show proof of her documentation. That evening I stand a few feet from the parents of Rayito de Sol and listen to them describe, with anguish, how good Ms. Diana was to their children. What it is like to have strangers with guns traumatize your kids. For a teacher to hide a three-year-old child for fear they might be killed. How their relatives will no longer leave the house. I hear the pain and fury in their voices, and I wonder who will be next. Understand what it is to pray in Chicago. On September 19th, Reverend David Black, lead pastor at First Presbyterian Church of Chicago, was praying outside the ICE detention center in Broadview when a DHS agent shot him in the head with pepper balls. Pepper balls are never supposed to be fired at the head because they can seriously injure, or even kill. “We could hear them laughing as they were shooting us from the roof,” Black recalled. He is not the only member of the clergy ICE has assaulted. Methodist pastor Hannah Kardon was violently arrested on October 17th, and Baptist pastor Michael Woolf was shot with pepper balls on November 1st. Understand what it is to sleep in Chicago. On the night of September 30th, federal agents rappelled from a Black Hawk helicopter to execute a raid on an apartment building on the South Sho…
November 9, 2025 at 8:49 PM
matt.godbolt.org
Lovely to hang out with the lovely folk at Solid Sands: youtu.be/5hvMDUWjw-Q
Webinar: Compiler Explorer’s @MattGodbolt meets Solid Sands’ CTO Marcel Beemster
YouTube video by Solid Sands
youtu.be
November 7, 2025 at 1:28 AM
matt.godbolt.org
I try to muddle through a few encodings to explain how (some) Ethernet works at the wire level. Thanks as ever to @seanski44.bsky.social for making me appear to make sense!

Watch here! www.youtube.com/watch?v=SJE2...
How Ethernet Sends Data - Computerphile
YouTube video by Computerphile
www.youtube.com
November 6, 2025 at 3:04 PM
matt.godbolt.org
I'll be chatting about testing, coding, Compiler Explorer, why I love optimisation, and origin stories (and more!) in a few hours' time with my pals at Solid Sands. Please, join us: register with the link below!

meet.zoho.eu/pdtm-xue-gmu
Register for Webinar
By clicking 'Register', you acknowledge that the webinar organizer may use this information to share updates regarding this webinar as well as for future communications.
meet.zoho.eu
November 5, 2025 at 12:40 PM
Reposted by Matt Godbolt
embeddedfm.bsky.social
Jason Turner of C++ Weekly spoke with us about the joy of puzzles, the changing directions of an interesting career, and the C++ programming language. We talked about C++; but only a little.

🎧 embedded.fm/episodes/513

#puzzles #author #C++ #learning #embedded #engineering #podcast #cpp #career
513: I’m Sorry You Learned Something — Embedded
Jason Turner of C++ Weekly and Empty Crate spoke with us about the joy of puzzles, the changing directions of an interesting career, and the C++ programming language. I mean, of course we talked about...
embedded.fm
November 3, 2025 at 6:04 PM
Reposted by Matt Godbolt
adamgordonbell.bsky.social
New Podcast Episode: @matt.godbolt.org is back after 5 years!

And he's sharing stories about breaking through layers.

Sometimes your “disk write” is a network hop in a trench coat, and your “fast path” hides a page fault.

Godbolt's rule will help.

corecursive.com/godbolt-rule...
Godbolt's Rule - CoRecursive Podcast
What do you do when your code breaks and the only fix is to dig into the runtime below?Matt Godbolt lives for that. Tile-based renderers, color-coded scanlines, zero-copy NICs—each story is a clue tha...
corecursive.com
November 4, 2025 at 12:21 PM
Reposted by Matt Godbolt
swiftonsecurity.com
I have a plea for you. I need an automotive engineer familiar with programming of the safety systems in a crash.

This is both an engineering passion of mine, and deeply personal. Hell, I will pay them an hourly rate.

Story I've tried for years. It feels like I've hit a wall on millisecond logic.
November 2, 2025 at 7:32 PM
matt.godbolt.org
Ooh! It's me again! www.youtube.com/watch?v=gg4p... - trying to teach an old dog some new tricks (again!) This time at the fantastic C++ on Sea :)
Teaching an Old Dog New Tricks - A Tale of Two Emulators - Matt Godbolt - C++ on Sea 2025
YouTube video by cpponsea
www.youtube.com
November 2, 2025 at 2:06 PM
matt.godbolt.org
If you see this, quite with a robot that isn't from Star Wars, Star Trek, Doctor Who, or Transformers.
Robbie, the NES robot!
October 31, 2025 at 2:24 AM
Reposted by Matt Godbolt
horsenburger.bsky.social
Teletext Halloween A-Z: K is for Killer Klowns from Outer Space
October 31, 2025 at 2:00 AM
matt.godbolt.org
Freezing cold as I've been doing a bunch of filming and I can't have the heating on without making a noise :-)
October 29, 2025 at 6:00 PM
Reposted by Matt Godbolt
foone.bsky.social
Finally, a personal request: I've been bedridden for the last year with medical issues, and I'm just now finally getting set up with a surgeon to get them fixed. I'm not able to work in this condition, so if you can spare a few dollars, that'd really help.

ko-fi.com/fooneturing
Support Foone Turing ❤️
Become a supporter of Foone Turing today!
ko-fi.com
October 28, 2025 at 1:32 AM
matt.godbolt.org
Who knows what mysteries I'll find on this (if I can find a drive)
A 3.5" floppy disc with no label. The metal protector has the Argonaut logo and "Argonaut" written underneath
October 26, 2025 at 6:32 PM
Reposted by Matt Godbolt
scottbatemanart.bsky.social
An animated loop basd on the games of the ZX Spectrum 8 bit micro from the 1980s

This was made in photoshop and Blender and just a fun little tribute to my all time favourite home computer

#zxspectrum #retrogaming #pixelart #8bitart
October 26, 2025 at 7:47 AM
matt.godbolt.org
Learning some video editing skills...wow what a time sink!
A desktop with a mouse, headphones, and various electronic junk. The PC is running video software and has a timeline on it.
October 24, 2025 at 10:44 PM
Reposted by Matt Godbolt
changelog.com
🚢 New Changelog interview! changelog.fm/663
Changelog Interviews #663
Ellie Huxtable's magical shell tool, Atuin, won developers' hearts by syncing, searching, and backing up our shell history with ease. Now Ellie is tackling the desktop with a GUI built to help teams make their workflows repeatable, shareable, and reliable.
changelog.fm
October 22, 2025 at 6:30 PM
matt.godbolt.org
I just rediscovered a mind map of the CppCon presentation I gave earlier this year. A window into my process!
Handwritten mind map on plain paper with interconnected bubbles and boxes exploring C++ ecosystem topics. Clearly readable elements include: Top area: "Build community", "IKEA doc", "Committee", "Know how stuff really works" Left side: "Circle", "Ranges", "Reflection" Central node: "C++" connecting to "Compile", "STL", "Stepanov" Right side: "Welsh", "School", "Local meetup", "conferences" "Eco system" (boxed) connects to: Build tools: "make", "OSS" Compiler infrastructure: "libclang", "Sanitizers", "clang", "LLVM" "CE" (Compiler Explorer) "libraries", "boost", "FMT" "tooling" "AI?" Throughout the map are numerous connecting arrows and lines showing relationships between concepts. Several bubbles contain handwriting that's too unclear to confidently transcribe, along with various time notations and red/pink annotations.
October 21, 2025 at 7:03 PM
matt.godbolt.org
I am so lucky to get to talk about things I love in Computerphile! Old hardware, cool encoding, prog rock and folks also spotted some Easter eggs in the background :)

youtu.be/VEyVm6dU55c

Very fortunate to get these opportunities; hope I can find time to keep doing after I start my new job!
How Computers Store Data Serially - Computerphile
YouTube video by Computerphile
youtu.be
October 21, 2025 at 2:07 PM
Reposted by Matt Godbolt
81632bitretro.com
It's Monday!

It's raise up my fellow YouTubers time!

#1 @bloggospow.bsky.social

bsky.app/profile/blog...
bloggospow.bsky.social Bloggo's POW! @bloggospow.bsky.social · 25d
So the venerable Master Sarsons was Bloggo's first games console!
What was his impressions of this new tech from the east and more importantly what games dragged him away from his home micros?
Watch and see!
youtu.be/oysi9CYzF6s
Sega Master System 40th Anniversary POW!
YouTube video by Bloggos Pow
youtu.be
October 20, 2025 at 8:11 AM
Reposted by Matt Godbolt
bundgaardf.bsky.social
I am living for the sumo wrestlers having fun playing tourists while preparing for the sumo tournament in London
Sumo wrestlers enjoying Stonehenge Sumo wrestlers having fun posing with Stonehenge Sumo wrestlers having fun posing with Stonehenge Sumo wrestlers posing like The Beatles on Abbey Road
October 18, 2025 at 2:40 PM
Reposted by Matt Godbolt
migueldeicaza.bsky.social
From the mastdonsphere, jawnsy writes:

@matt.godbolt.org @compiler-explorer.com @lefticus.bsky.social

[0] xania.org/202206/happy-birthda…

[1] youtu.be/bSkpMdDe4g4

[2] youtu.be/nAbCKa0FzjQ

[3] youtu.be/kXe-YkJ9nBs
Something that I love about technology is that it often used in new, unexpected, and delightful ways. While @mattgodbolt created @compiler_explorer to better understand whether features could be used given his constraints at $work [0], it has since found many new use cases. Matt used it to teach us what compilers do [1, 2] and @lefticus used it to introduce Stack Usage [3].
October 18, 2025 at 3:43 PM
Reposted by Matt Godbolt
dirkmyers.bsky.social
This is the mug that stays near the computer, freeing other mugs to travel about the house.
matt.godbolt.org Matt Godbolt @matt.godbolt.org · Aug 17
If you're like me and can't remember if it's RCX or R8 for the fourth parameter... Get the Compiler Explorer ABI Mug: actual calling conventions for x86-64 System V, Windows, and ARM64. Support @godbolt.org: grab yours here -> shop.compiler-explorer.com/collections/...
October 17, 2025 at 8:19 PM
matt.godbolt.org
One of my favourite talks to have seen in person just got published: youtube.com/watch?v=sIZU... go check out Walter's brilliant presentation!
In Search of the Perfect Return: A C++ Programming Journey
YouTube video by Chicago C++ User Group
youtube.com
October 17, 2025 at 8:16 PM
matt.godbolt.org
I've been thrilled with the popularity of the mugs; thanks to those who've bought one (or more!) Every sale helps Compiler Explorer!
matt.godbolt.org Matt Godbolt @matt.godbolt.org · Aug 17
If you're like me and can't remember if it's RCX or R8 for the fourth parameter... Get the Compiler Explorer ABI Mug: actual calling conventions for x86-64 System V, Windows, and ARM64. Support @godbolt.org: grab yours here -> shop.compiler-explorer.com/collections/...
October 16, 2025 at 6:09 PM