Matt Godbolt
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Matt Godbolt
@matt.godbolt.org
3.8K followers 680 following 900 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
Starting tomorrow! Subscribe now so as not to miss anything!

#AoCO2025
November 30, 2025 at 5:59 PM
matt.godbolt.org
Retro Christmas shenanigans...
Me grinning like a berk holding a BBC Micro outside in the snow against a snow-filled back garden in Chicago
November 30, 2025 at 2:17 PM
matt.godbolt.org
Thank you all for the orders so far! I'll keep this on until Monday! So there's still time to treat yourself (or a geek in your life), get 10% off /and/ help @compiler-explorer.com
matt.godbolt.org Matt Godbolt @matt.godbolt.org · 2d
I'm not good at this marketing lark, but as it's black friday and I'm inundated with other people's offers...

You can get 10% off CE swag today with code BLACKFRIDAY :)

shop.compiler-explorer.com/promo/BLACKF...

Makes a great present too!
Compiler Explorer
The official Compiler Explorer shop! Come show your support for CE and get cool gear!
shop.compiler-explorer.com
November 30, 2025 at 12:24 AM
matt.godbolt.org
Just spent a couple of days with my son helping out at @bloopmuseum.bsky.social - something really exciting is being put together just outside Pittsburgh. Opening soon and if you're into retro stuff of any kind; video games and personal computing: check it out!
givebutter.com/bloopholiday
Bloop Museum Moves to Pittsburgh
We got the building! Here's what's next.
givebutter.com
November 29, 2025 at 2:46 PM
Reposted by Matt Godbolt
lookitup.baby
Technically “fuck around and find out” is the scientific method
November 29, 2025 at 1:00 AM
Reposted by Matt Godbolt
lefticus.bsky.social
I know you "need" this Christmas Winter Holiday themed pirate constexpr long sleeve shirt!

jason-turner-shop.fourthwall.com/products/con...
constexburrr pirate Christmas themed shirt. It's red and long sleeve. Honestly, I'm not sure why I did this one. I was on a roll. you should see the car pirate constexpr one that's also in the store.
November 29, 2025 at 12:22 AM
matt.godbolt.org
I'm not good at this marketing lark, but as it's black friday and I'm inundated with other people's offers...

You can get 10% off CE swag today with code BLACKFRIDAY :)

shop.compiler-explorer.com/promo/BLACKF...

Makes a great present too!
Compiler Explorer
The official Compiler Explorer shop! Come show your support for CE and get cool gear!
shop.compiler-explorer.com
November 28, 2025 at 2:24 PM
matt.godbolt.org
Today marks one year since I left my job with my pals at Aquatic. I've not quite achieved all the things I wanted to do in this time but I definitely have had an amazing time. CE work, conference talks, Computerphile, emulators...it's been a blast.

One week til new job at Hudson River! Can't wait!!
November 24, 2025 at 12:14 PM
Reposted by Matt Godbolt
inversephase.bsky.social
Every time I see this I think about@matt.godbolt.org
A CPU card for an S-100 bus computer copyright Godbout (not Godbolt) Electronics
November 23, 2025 at 3:39 PM
Reposted by Matt Godbolt
moorejh.bsky.social
Love this! #retrocomputing #coding
November 22, 2025 at 2:21 PM
Reposted by Matt Godbolt
gotocon.com
“Assembly isn’t dead - just specialized.” Matt Godbolt and Dan Kusswurm explore modern x86 coding, when assembly is worth it, and how it can deliver up to 100x speedups for critical tasks.
youtu.be/L2Qu9rk05rE?...
Modern X86 Assembly Language Programming • Daniel Kusswurm & Matt Godbolt • GOTO 2025
YouTube video by GOTO Conferences
youtu.be
November 20, 2025 at 1:45 PM
matt.godbolt.org
Delighted to have been able to spend time chatting with Dan Kusswurm about his excellent x86 programming book. Thanks to @gotocon.com for setting this up!

Go listen at: youtu.be/L2Qu9rk05rE
Modern X86 Assembly Language Programming • Daniel Kusswurm & Matt Godbolt • GOTO 2025
YouTube video by GOTO Conferences
youtu.be
November 20, 2025 at 1:56 PM
Reposted by Matt Godbolt
lookitup.baby
These are not serious people.
COWEN: The stupidest question possible: Why don't we just make more GPUS? ALTMAN: Because we need to make more electrons. COWEN: What's stopping that? What's the ultimate binding constraint? ALTMAN: We're working on it really hard. COWEN: If you could have more of one thing to have more compute, what would the one thing be? ALTMAN: Electrons.
November 19, 2025 at 9:05 AM
Reposted by Matt Godbolt
inversephase.bsky.social
Sorry I'll never get to write those Apple IIGS bangers for your game, Becky - I hope you're finally able to see Jennell again. 🫂
bloopmuseum.bsky.social The Bloop Museum @bloopmuseum.bsky.social · 12d
So saddened to lose Burger Becky, teller of stories, coder of games, ports, libraries. Becky was diagnosed with adenocarcinoma just 2 months ago. The gofundme was to help with her care; now it's for the funeral.

gofund.me/b71c7b1ae

Please help us archive your stories or ephemera related to Becky!
Donate to Help Rebecca Ann Heineman Fight Aggressive Cancer, organized by Rebecca Heineman
I’m Rebecca Ann Heineman. The very first video game champion, creat… Rebecca Heineman needs your support for Help Rebecca Ann Heineman Fight Aggressive Cancer
gofund.me
November 18, 2025 at 9:37 PM
Reposted by Matt Godbolt
keefstuart.bsky.social
Hi I wrote about the Sega Master System and how it’s been criminally overlooked because everyone goes on about the NES like it was the only 8bit console in the world look don’t get me started

www.theguardian.com/games/2025/n...
Master System at 40: the truth about Sega’s most underrated console
Forty years ago, the Nintendo Entertainment System dominated the markets in Japan and the US. But in Europe, a technologically superior rival was making it look like an ancient relic
www.theguardian.com
November 18, 2025 at 12:05 PM
Reposted by Matt Godbolt
lefticus.bsky.social
Check out my new C++ research tools!

Disclaimer: I used AI exclusively for this. I wanted to see how far I could push the tools.

1) LaTeX to markdown: github.com/lefticus/cpp...
2) Diff tool of per-stable-name of the markdown

cppevo.dev/diffs/cpp11-... to see how has evolved!
GitHub - lefticus/cppstdmd: Converter for C++ Standard Latex into Human Readable Markdown
Converter for C++ Standard Latex into Human Readable Markdown - lefticus/cppstdmd
github.com
November 16, 2025 at 6:22 PM
matt.godbolt.org
I just posted my little intro to the Advent of Compiler Optimisation #AoCO that I announced yesterday. Check it out (and laugh at my terrible editing) at youtu.be/j-BwR-Cw0Gk?... @!4 if you want to watch the series, subscribe! :)
Intro to the Advent of Compiler Optimisations
YouTube video by Matt Godbolt
youtu.be
November 15, 2025 at 1:52 AM
matt.godbolt.org
Cripes; turns out if you advertise you get more subscribers hehe! Can't wait to release the videos and posts in a couple of weeks!
Hockey stick graph of new subscribers to my YT channel. 221 in the last 28d, more than usual by a margin
November 14, 2025 at 2:48 PM
Reposted by Matt Godbolt
compiler-explorer.com
Of course this series will demonstrate ways to use Compiler Explorer - and is part of a fund raiser too. shop.compiler-explorer.com and www.patreon.com/cw/mattgodbolt
Compiler Explorer
The official Compiler Explorer shop! Come show your support for CE and get cool gear!
shop.compiler-explorer.com
November 13, 2025 at 9:11 PM
matt.godbolt.org
This December, I'll be posting an article & video each day until Christmas in the Advent of Compiler Optimisations! #AoCO2025
Each day we'll explore a fun optimisation in C or C++; some low-level, x86 or ARM-specific, some high-level. Hope you'll join me!
YT: youtube.com/mattgodbolt
Blog: xania.org
Matt Godbolt’s blog
xania.org
November 13, 2025 at 7:51 PM
matt.godbolt.org
Sounds like something @aresluna.org might have some clues about - any ideas?
lauriewired.bsky.social LaurieWired @lauriewired.bsky.social · 19d
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