I did Compiler Explorer's monthly accounts, and for the first time in ages we only broke even. Usually we run at a small surplus (which I save) & we have a year contingency saved up. If you want to support us: * Buy stuff: shop.compiler-explorer.com * Patron/GH: "Other" menu on CE Please repost. thx

Ep 536 -Devirtualization and performance with final youtu.be/MbqWWkP8Ras

Here's an easter egg in the new Lego Batman that I think all of you will REALLY appreciate. It's so good, I had to make a video.

link here btw: www.youtube.com/watch?v=lI7t...

keith and I are ready to watch the C++ documentary premiere

(noon PST today) are you?

C++: The Documentary premiered last week, and will be live to the world at 7pm UTC tomorrow: www.youtube.com/watch?v=lI7t... Had a blast moderating the panel and getting to know some absolute C++ Legends! Thank again to @cultrepo.bsky.social and my employer Hudson River Trading!

More #notai #badhumanart. Join me! #watercolor and #clay. Orca. I'm actually kind of proud of these ones. Attempt 16. Bonus #pixelart orca also.

If you are free tomorrow do you fancy a visit to the Northwest Computer Museum to help them celebrate their 3rd birthday? Entry is free and there's so much to see and do. I hope to see you there, please say hello if you do! It's located in Leigh, near Manchester. Here's a flyer from their socials.

Word, Ms Word

It's been like 3w since I did a CE update oops. 68 PRs on the main repo alone (20+ on the other projects...) Sorry everyone! I'm catching up now...

Flamboyant (adj): - burns but also floats on water

How aware are modern compilers of exact microarchitectural layouts?

 Quite a lot…in one very specific way. 
Intel x86 is *not* the same as AMD x86. 

 Sure…it’s the “same ISA” in the broadest sense, but the individual instructions often take different numbers of cycles.

Watch me try and make division sexy again with some help from Sean at Computerphile! www.youtube.com/watch?v=-14t...

Managed to distract myself completely yesterday instead of edit the next Two's Complement.

Only 4 weeks until my next C++ Best Practices workshop, in Folkestone, UK. Be sure to sign up now! accuonsea.uk/2026/session...

Badger Badger Badger Badger Mushroom Snaaaaaake

@davidjefferies.bsky.social has been very busy converting 6502 based BBC Micro Exile to C++ so that it can be run on modern day computers. Check out what he's managed to achieve - stunning! www.youtube.com/watch?v=Tywb...

Had fun yesterday at the GCASR 2026 conference! It was a delight to be able to walk to it from my house, and I met some very interesting folks and learned a ton. My own awkward presentation was out of place but at least got some laughs! Thanks for having me!

Somewhere in the last couple weeks I passed my 30,000th anti-ice whistle printed and shipped to organizers, neighbors, and friends around the country. the work has become second-nature at this point, the chirp of the printer a sound nobody in my house even notices. Get yours: linktr.ee/3Dwhistles

Back from C++Now and wow, what a conference. I'd forgotten how beautiful the venue is, how intimate the setting, how friendly everyone is and how much you really get to know all the other attendees. Loved it!

First full "dress rehearsal" and 1h25, so very close to time. Also, for the first time (and this is 6th run-through) it felt like "maybe this is actually good?". Man, I love performance (both kinds!!) but i hate the doldrums during preparation!

I think I maybe have the slides for my C++Now talk presentation ready! I'm on my 5th run through, and each time they get a bit better. Now time to really polish and probably remove 25% of them... :/ No matter how many times I've done this the arc is always the same, panic finally gives way to calm.

Very excited to watch this! Go learn some 6502 and get a real insight into how computers really work!

I’ve posted it before, but it feels evergreen The two hardest problems in Computer Science are 1. Human communication 2. Getting people in tech to believe that human communication is important

Got thoughts on C++? Share them with Jason on CppCast!

It is spooky how much Fabian Giesen and I agree on so many many things. So in lieu of me making a video of my ramblings, watch his instead. www.youtube.com/watch?v=UBhT...

See you in Toronto in a couple of weeks at NDC Toronto for a bunch of great C++ content and workshops! May 5-8 ndctoronto.com CODE: JASONS20 for 20% off

Today marks the 44th anniversary of the ZX Spectrum, the weird little goblin of a computer that changed my life. My ongoing book series Speccy Nation is my attempt to explore why this period of gaming captivated me so deeply. Buy 'em here: www.amazon.co.uk/s?k=speccy+n... #ZXSpectrum

I'm at the "cleaning the grease out of the hob extractor fans" stage of avoiding writing slides for C++Now

Something for @bloopmuseum.bsky.social to consider? Remote video console access? :-)

Great to see this being appreciated!

Another day, another set of broken YouTube on Chromecast features... today: live premieres loop a 4-second clip over and over again.

hey @limitedrungames.com, I have a bunch of your games from over the years. Do you mind explaining why you're violating the license of my friends emulator? bsky.app/profile/did:...

Full Video: www.youtube.com/watch?v=KKbg...

Modern DRAM is based on a brilliant design from IBM. But, we're still paying for a latency penalty that's existed since the 60s! In this video, I'm introducing my research project (Tailslayer) that immensely reduces p99.99 latency on traditional RAM!

And the man knew what morals were worth teaching.

Less than 2 weeks until my C++Online Workshop! Make sure you sign up now! cpponline.uk/workshop/per...

I have a Basic Fractal Benchmark on this Google Sheet: If anyone has cool computers with 80-columns and BASIC, try running this little program while timing it. Report back so I can add it to the leaderboard. docs.google.com/spreadsheets...

The programme for C++Now 2026 is now live which features 50 different talks across 5 days from May 4th - 8th and includes talks from @matt.godbolt.org @foonathan.fosstodon.org.ap.brid.gy and more! View the full announcement: cppnow.org/announcement... #cpp #cplusplus #programming

Sharing this random doodle from a meeting 6 years ago as part of #badhumanart inspired by @lefticus.bsky.social :) Clearly it was a riveting meeting (can't remember what it was about but I've kept this doodle ever since)

C++Now is pleased to announce the third of three keynotes for the 2026 Conference which will be presented on Friday 8th May! Benchmarking - It's About Time by @matt.godbolt.org Find out more and register: schedule.cppnow.org/session/2026... #cpp #cplusplus #programming

🧑‍🎓 LEARN how to WRITE ✍️ , RECOGNIZE 👀 , and GENERATE 🤖 better C++! Preview: youtu.be/Ipr6ntCAm9A Apr 9 online cpponline.uk/workshop/per... May 5-7 CA ndctoronto.com/workshops/c-... Jun 15-16 UK accuonsea.uk/tickets/ Sep 12-13 US cppcon.org/class-2026-b... Sep 21-22 NO ndctechtown.com/tickets

@fbuontempo.bsky.social joins 🖥️ @matt.godbolt.org to break down Modern C++ • How to learn modern C++ • The features most people struggle with • Why teaching matters more than syntax • What’s coming next this might help you unlearn and relearn the right things 🎧 gotopia.tech/podcast

Walking down memory lane with a bit of Claude assistance: a game I made in 1993 but lost the source to, reverse engineered and things like maps etc created: github.com/mattgodbolt/...

Having a great old time meeting friends and hacking on old Acorns at ABUG south. Representing my adopted homeland with an @adriansdigitalbasement.com t-shirt :)

I'm starting to get as excited as a kid before Christmas. I'm packing to go to ABUG in the UK. Last year was a load of fun and I'm really looking forward to meeting up with my pals! The simple pleasures of playing with old 8-bit computers with friends in a pub. Something needed right now!

I love this idea!!!

I really appreciate the 6mo free, @anthropic.com ! Yay but - I'm already on 20x and I can't accept it... - please help :)

At our next meeting on Monday 16th March come chat with @matt.godbolt.org in the pub (or on Zoom if you must) about JSbeeb, Compiler Explorer, and more! Free entry, but you have to buy your own drinks 😛 rougol.jellybaby.net/meetings/ind...