Patrick Dubroy
@dubroy.com
Programmer & researcher, co-creator of https://ohmjs.org. 🇨🇦 🇩🇪 🇪🇺
Co-author of https://wasmgroundup.com — learn Wasm by building a simple compiler in JavaScript.
Prev: CDG/HARC, Google, BumpTop
Co-author of https://wasmgroundup.com — learn Wasm by building a simple compiler in JavaScript.
Prev: CDG/HARC, Google, BumpTop
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Patrick Dubroy
@dubroy.com
· Mar 10
Excited to announce the official launch of our online book, WebAssembly from the Ground Up! 🎉
It's the book we wish we'd had 3 years ago.
No messing with tools and frameworks. It's a hands-on guide to the core of Wasm: the instruction set and module format.
Link below. 👇
It's the book we wish we'd had 3 years ago.
No messing with tools and frameworks. It's a hands-on guide to the core of Wasm: the instruction set and module format.
Link below. 👇
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!!
If you bought it in early access, thanks for your support! 🙏
If you haven't bought it yet, please check it out!!
Thanks, hadn’t heard of it before but I’ll check it out!
January 17, 2026 at 6:17 PM
Thanks, hadn’t heard of it before but I’ll check it out!
Ah, good point. I've been using Ecosia. Haven't tried Kagi.
January 17, 2026 at 2:01 PM
Ah, good point. I've been using Ecosia. Haven't tried Kagi.
Very cool. What kind of machine is this?
January 16, 2026 at 3:39 PM
Very cool. What kind of machine is this?
New blog post:
De-Googling
→ dubroy.com/blog/de-goog...
…in which I tell you about some great services & companies that I'm very happy to have discovered.
De-Googling
→ dubroy.com/blog/de-goog...
…in which I tell you about some great services & companies that I'm very happy to have discovered.
January 16, 2026 at 3:35 PM
New blog post:
De-Googling
→ dubroy.com/blog/de-goog...
…in which I tell you about some great services & companies that I'm very happy to have discovered.
De-Googling
→ dubroy.com/blog/de-goog...
…in which I tell you about some great services & companies that I'm very happy to have discovered.
Nice, looks really good!
January 12, 2026 at 4:28 PM
Nice, looks really good!
A few quotes about Steve Jobs from "Valley of Genius" by Adam Fisher.
January 11, 2026 at 5:26 PM
It's actually official supported (from the pre-X times), you can find instructions here: www.tweetarchivist.com/how-to-downl...
I just took that and wrote some scripts to do some additional processing on it (resolving short links, etc.)
I just took that and wrote some scripts to do some additional processing on it (resolving short links, etc.)
www.tweetarchivist.com
January 10, 2026 at 7:15 PM
It's actually official supported (from the pre-X times), you can find instructions here: www.tweetarchivist.com/how-to-downl...
I just took that and wrote some scripts to do some additional processing on it (resolving short links, etc.)
I just took that and wrote some scripts to do some additional processing on it (resolving short links, etc.)
I believe it can! But it was a one-time thing, and I tried gallery-dl first, and it worked.
January 10, 2026 at 6:16 PM
I believe it can! But it was a one-time thing, and I tried gallery-dl first, and it worked.
Two talks on data-oriented design that I enjoyed this week:
Data-Oriented Design and C++ by Mike Acton
→ www.youtube.com/watch?v=rX0I...
(End with an unfortunately lame quote, but otherwise great)
Cpu Caches and Why You Care by Scott Meyers
→ www.youtube.com/watch?v=WDIk...
Data-Oriented Design and C++ by Mike Acton
→ www.youtube.com/watch?v=rX0I...
(End with an unfortunately lame quote, but otherwise great)
Cpu Caches and Why You Care by Scott Meyers
→ www.youtube.com/watch?v=WDIk...
CppCon 2014: Mike Acton "Data-Oriented Design and C++"
YouTube video by CppCon
www.youtube.com
January 10, 2026 at 1:57 PM
Two talks on data-oriented design that I enjoyed this week:
Data-Oriented Design and C++ by Mike Acton
→ www.youtube.com/watch?v=rX0I...
(End with an unfortunately lame quote, but otherwise great)
Cpu Caches and Why You Care by Scott Meyers
→ www.youtube.com/watch?v=WDIk...
Data-Oriented Design and C++ by Mike Acton
→ www.youtube.com/watch?v=rX0I...
(End with an unfortunately lame quote, but otherwise great)
Cpu Caches and Why You Care by Scott Meyers
→ www.youtube.com/watch?v=WDIk...
TIL: One-liners for downloading media
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
January 10, 2026 at 1:44 PM
TIL: One-liners for downloading media
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
Lots of gems here. Definitely worth a read if you blog or would like to.
(And I'll be following @thorstenball.com's advice in 2026: set a schedule.)
(And I'll be following @thorstenball.com's advice in 2026: set a schedule.)
Here's one final remix of the 2025 tech blogger interviews: everyone sharing their top blogging lessons learned writethatblog.substack.com/p/technical-...
January 9, 2026 at 6:35 PM
Lots of gems here. Definitely worth a read if you blog or would like to.
(And I'll be following @thorstenball.com's advice in 2026: set a schedule.)
(And I'll be following @thorstenball.com's advice in 2026: set a schedule.)
Oh dang, that looks nice! I think I saw it a while back but forgot about it.
If I had remembered, I would have probably just used that :-)
If I had remembered, I would have probably just used that :-)
January 9, 2026 at 5:09 PM
Oh dang, that looks nice! I think I saw it a while back but forgot about it.
If I had remembered, I would have probably just used that :-)
If I had remembered, I would have probably just used that :-)
My web site is built with a custom-written static site generator (basically just a ~700 line Python script + Jinja templates).
I extended it to be able to able to parse the download and render the downloaded archive (with lots of help from Claude Code).
I extended it to be able to able to parse the download and render the downloaded archive (with lots of help from Claude Code).
January 9, 2026 at 2:52 PM
My web site is built with a custom-written static site generator (basically just a ~700 line Python script + Jinja templates).
I extended it to be able to able to parse the download and render the downloaded archive (with lots of help from Claude Code).
I extended it to be able to able to parse the download and render the downloaded archive (with lots of help from Claude Code).
Finally have a self-hosted version of my personal Twitter archive, so I can really, truly delete everything over there.
→ dubroy.com/twitter
It's actually a lot of fun going through these! And orders of magnitude faster and more pleasant than on the official site.
→ dubroy.com/twitter
It's actually a lot of fun going through these! And orders of magnitude faster and more pleasant than on the official site.
January 9, 2026 at 11:34 AM
Finally have a self-hosted version of my personal Twitter archive, so I can really, truly delete everything over there.
→ dubroy.com/twitter
It's actually a lot of fun going through these! And orders of magnitude faster and more pleasant than on the official site.
→ dubroy.com/twitter
It's actually a lot of fun going through these! And orders of magnitude faster and more pleasant than on the official site.
"Valgrind is in essence a virtual machine using just-in-time compilation techniques."
Huh. I had no idea.
en.wikipedia.org/wiki/Valgrind
Huh. I had no idea.
en.wikipedia.org/wiki/Valgrind
![Valgrind is in essence a virtual machine using just-in-time compilation techniques, including dynamic recompilation. Nothing from the original program ever gets run directly on the host processor. Instead, Valgrind first translates the program into a temporary, simpler form called intermediate representation (IR), which is a processor-neutral, static single assignment form-based form. After the conversion, a tool (see below) is free to do whatever transformations it would like on the IR, before Valgrind translates the IR back into machine code and lets the host processor run it. Valgrind recompiles binary code to run on host and target (or simulated) CPUs of the same architecture. It also includes a GDB stub to allow debugging of the target program as it runs in Valgrind, with "monitor commands" that allow querying the Valgrind tool for various information.
A considerable amount of performance is lost in these transformations (and usually, the code the tool inserts); usually, code run with Valgrind and the "none" tool (which does nothing to the IR) runs at 20% to 25% of the speed of the normal program.[7][8]](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:zcycfvljdjkc2ywtj33blgdl/bafkreighxogjwjq66ed5qqsnmghnt4dzkwkt5xzy4ccsyqn52ck5fmyc6i@jpeg)
January 7, 2026 at 7:06 PM
"Valgrind is in essence a virtual machine using just-in-time compilation techniques."
Huh. I had no idea.
en.wikipedia.org/wiki/Valgrind
Huh. I had no idea.
en.wikipedia.org/wiki/Valgrind
Do you ever (or would you consider) recording/streaming your investigation into such an issue? Would be really interesting to see imo.
January 7, 2026 at 5:45 PM
Do you ever (or would you consider) recording/streaming your investigation into such an issue? Would be really interesting to see imo.
TIL: Protomaps and PMTiles
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
January 6, 2026 at 3:43 PM
TIL: Protomaps and PMTiles
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
(This is basically the same as the distinction between synthesized vs inherited attributes in attribute grammars.)
January 5, 2026 at 12:08 PM
(This is basically the same as the distinction between synthesized vs inherited attributes in attribute grammars.)
One diff I've noticed is that in compilers, most computation is bottom up — generally, a change in a leaf means that all the ancestors are dirty.
Whereas in UI, there's a lot more top-down information flow (props).
Whereas in UI, there's a lot more top-down information flow (props).
January 5, 2026 at 12:06 PM
One diff I've noticed is that in compilers, most computation is bottom up — generally, a change in a leaf means that all the ancestors are dirty.
Whereas in UI, there's a lot more top-down information flow (props).
Whereas in UI, there's a lot more top-down information flow (props).
Nice article, I was looking at this recently as well: bsky.app/profile/dubr.... I've also been working on fully incremental pipelines on top of the incremental parsing support in @ohmjs.org.
PL folks —
For @ohmjs.org, I’m looking at how to support fully incremental pipelines (eg parsing → codegen, all incremental). I know about Salsa (github.com/salsa-rs/salsa); what else should I be looking at?
For @ohmjs.org, I’m looking at how to support fully incremental pipelines (eg parsing → codegen, all incremental). I know about Salsa (github.com/salsa-rs/salsa); what else should I be looking at?
GitHub - salsa-rs/salsa: A generic framework for on-demand, incrementalized computation. Inspired by adapton, glimmer, and rustc's query system.
A generic framework for on-demand, incrementalized computation. Inspired by adapton, glimmer, and rustc's query system. - salsa-rs/salsa
github.com
January 5, 2026 at 12:00 PM
Nice article, I was looking at this recently as well: bsky.app/profile/dubr.... I've also been working on fully incremental pipelines on top of the incremental parsing support in @ohmjs.org.
"a nice chewy problem"
January 5, 2026 at 10:11 AM
"a nice chewy problem"
So much good stuff here!
And lots of it can be applied to many other areas: learning experiences, programming languages, etc.
via @szymonkaliski.com
And lots of it can be applied to many other areas: learning experiences, programming languages, etc.
via @szymonkaliski.com
Game design is simple, actually. Except when it isn't. Here are the 12 things you need to know.
Game design is simple, actually
So, let’s just walk through the whole thing, end to end. Here’s a twelve-step program for understanding game design. One: Fun There are a lot of things people call “fun.” But most of them are not useful for getting better at making games, which is usually why people read articles like this. The fun of a bit of confetti exploding in front of you, and the fun of excruciating pain and risk to life and limb as you free climb a cliff are just not usefully paired together.
www.raphkoster.com
January 5, 2026 at 9:34 AM
So much good stuff here!
And lots of it can be applied to many other areas: learning experiences, programming languages, etc.
via @szymonkaliski.com
And lots of it can be applied to many other areas: learning experiences, programming languages, etc.
via @szymonkaliski.com
What I'm doing now
→ dubroy.com/now/
→ dubroy.com/now/
December 27, 2025 at 3:53 PM
What I'm doing now
→ dubroy.com/now/
→ dubroy.com/now/
TIL: V8 Natives syntax
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...
December 24, 2025 at 1:20 AM
TIL: V8 Natives syntax
→ github.com/pdubroy/til/...
→ github.com/pdubroy/til/...