Patrick Dubroy

Here it is — very happy to officially release the book that @marianoguerra.org and I have been working on for the past 2½ years. If you bought it in early access, thanks for your support! 🙏 If you haven't bought it yet, please check it out!!

Another example: the paper about Incremental Packrat Parsing that I wrote with @dubroy.com has a bunch of nice diagrams that explain our idea. We made those using an explorable explanation -- a tiny parser that implements our idea. ohmjs.org/pubs/sle2017...

Everyone’s seen the Sketchpad demo. Few understand how it actually works. I reimplemented Sketchpad from scratch, and I’m making short videos that recreate Sutherland’s demos and explain how they work. The first 8 are up — from drawing a line to the famous rivet. Link below 👇

Been meaning to learn Wasm? Now's your chance to grab our book for CHEAP.

Tag yourself, I'm "future altered by doing request"

New blog post: Fast is better than slow → dubroy.com/blog/fast-is...

"You don't know which afternoon of debugging was the one that taught you something fundamental about your data until three years later, when you're working on a completely different problem and the insight surfaces" ergosphere.blog/posts/the-ma...

TIL: Python signal handling → github.com/pdubroy/til/...

Did you miss @dubroy.com teaching us about WebAssembly No worries! Check out our conversation on the Web Dev Podcast, then code along with us on Learn with Jason. WDP: codetv.dev/series/web-d... LWJ: codetv.dev/series/learn...

New post on the @ohmjs.org blog — Inside Ohm's PEG-to-Wasm compiler → ohmjs.org/blog/2026/03... v18 is now more than 50x faster for real-world grammars while using about 10% of the memory 🔥 …this post goes into the details of how it's built.

Love this — microui: A tiny, portable, immediate-mode UI library written in ANSI C → github.com/rxi/microui Only around 1100 SLoC (!)

In 30 minutes!

Tomorrow at 17:20 CET / 12:20 EDT / 9:20 PDT, I'll be livestreaming at twitch.tv/jlengstorf, teaching @jason.energy about WebAssembly!! I'll do my best to condense the best parts of our Wasm book (@wasmgroundup.com) into ~60 minutes. 😄

One more time — I'm looking for new consulting clients. Some ways I can help: ∙ Fractional tech leadership (tackling "leadership debt" in small eng orgs) ∙ Full-stack, 0 to 1 projects ∙ Language design & impl (eg with @ohmjs.org) ∙ JavaScript/TypeScript perf (🔁 appreciated)

TIL: Multithreaded WebAssembly → github.com/pdubroy/til/... (corrected)

TIL: Fibonacci hashing → https://github.com/pdubr...

TIL that everyone who installs the Vercel CLI now gets a copy of @ohmjs.org

Is it the end of February already?? Yes, yes it is. Which means we just sent out our #Wasm tidbits. Sign up here to get it in your inbox once a month (ish): sendfox.com/wasmgroundup

slowmo.dev by @seflless.bsky.social is pretty damn cool — "Slow down, pause, or speed up time of any web content." Here's how it works.

people often don't appreciate how dramatically the intensity of knowledge work, especially in STEM, has changed in the last 60 years even prior to the advent of AI. tough to imagine that a scientist would spend most of their time literally plotting data

TIL: Set difference vs symmetric difference → https://github.com/pdubr...

Finally! 😅

TIL: api-extractor → github.com/pdubroy/til/...

Looking forward to this — I'll be doing an invited talk at MoreVMs in Munich on March 17. Hope to see some of you there!

So excited to officially released the beta version! It's been a lot of work over the past ~year.

Happy Friday! We just published a new blog post — A WebAssembly Interpreter: Part 2 → wasmgroundup.com/blog/wasm-vm... In the first post, we wrote a small #Wasm interpreter from scratch in JS. In Part 2, we extend the interpreter to support local and global variables.

I'm extremely hyped about the performance of the upcoming (#Wasm-based) @ohmjs.org v18. !!! (please don't let this be a mistake in my benchmarking)

Final 24h! Early bird for #prog26 ends tomorrow, Feb 20. Don't miss the art & science of programming in Munich (Mar 16–20)! Register: 2026.programming-conference.org Submit to the Substrates workshop: 2026.programming-conference.org/home/substra...

This is exactly one of the findings of the study* on tabbed browsing I did ~15 yrs ago — tab usage is bimodal. Funny to see that it (anecdotally at least) still holds up! ∗ "A Study of Tabbed Browsing Among Mozilla Firefox Users" from CHI 2010: dl.acm.org/doi/pdf/10.1...

"This speed can lead users to race past useful experiences, particularly ones that are artistically or pedagogically helpful." Slowness, Politics, and Joy: Values That Guide Technology Choices in Creative Coding Classrooms → www.mcnutt.in/assets/tatto...

"The root cause of the Spectre and Meltdown vulnerabilities was that processor architects were trying to build not just fast processors, but fast processors that expose the same abstract machine as a PDP-11." C Is Not a Low-level Language: spawn-queue.acm.org/doi/pdf/10.1...

+1, really enjoyed this talk. Some incredible examples involving the "the sophisticated software at the very lowest layers of the stack".

Don't miss this! It's a joy, and it feels like a throwback in the best way possible (caring about UI details, remember that??)

What I'm doing now → dubroy.com/now/ Note: I have availability for consulting projects in 2026. If you know of something interesting, please get in touch!

TIL: HTTP Range requests → https://github.com/pdubr...

New blog post — Look for what's true → dubroy.com/blog/look-fo...