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Hewitt, Meijer and Szyperski: The Actor Model (everything you wanted to know...)

6 videos recommended on HN
YouTube
5 HN users recommended this interview5 months2015–2025 score 6.5
Years with an HN recommendation, 2007–2026

HN recommends it as the best video introduction to the actor model, straight from its inventor, and revisited it after Hewitt's death.

A standing whiteboard conversation at Lang.NEXT 2012 among Carl Hewitt, Erik Meijer and Clemens Szyperski about the actor model. Hewitt, who originated the model, explains its foundations.

“It's truly a masterclass.” (HN, 2023)

4 strong recommendations · 2 recommendations · 3 citations · Interviews · intermediate

9 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@napsterbr Mar 2021 Strongly recommends
on HN thread A few notes on message passing
I'm sorry to go completely off-topic here, but I just wanted to say thank you! Your discussion[0] with Meijer and Szyperski was mind-blowing and taught me a lot about the actor model. This was, hands down, one of the best classes I've ever had. Thanks for sharing this knowledge. [0] - [this video]
Mind-blowing discussion that teaches the actor model
@napsterbr Jan 2023 Strongly recommends
on HN thread Carl Hewitt has died [pdf]
May he RIP. I first heard about Hewitt after watching this[0] conversation about the actor model. It's truly a masterclass. For those who want to learn more about the actor model, or simply have a fond memory of ProfHewitt, I highly recommend it. [0] - [this video]
Masterclass conversation on the actor model with Hewitt
@TowerTall Jan 2023 Strongly recommends
on HN thread Carl Hewitt has died [pdf]
This is one of my favorite tech talks. Hewitt, Meijer and Szyperski: The Actor Model (everything you wanted to know but are afraid to ask) [this video]
Favorite tech talk on the actor model
@helge9210 Apr 2022 Recommends
on HN thread Actor system for the JVM developed by Electronic Arts
> so different in an actor vs a queue with workers In short: different computational model -- Actor model vs. Communicating sequential processes. This really helped me: [this video] Edit: added link to video
Clarifies actor model versus communicating sequential processes

Citations, criticism and jokes

@noblethrasher Sep 2015 Cites it
on HN thread Why WhatsApp Only Needs 50 Engineers for Its 900M Users
Indeed, Joe Armstrong once said that he believes Erlang to be the only OO language according to Alan Kay's idea [1]. Also, let's not forget to give credit to Carl Hewitt who came up with actors in the first place [2]. [1] [link] [2] [this video]
Carl Hewitt discussing the actor model he originated
@ahasani Mar 2020 Cites it
on HN thread Writing an OS in Rust: Async/Await
Read more
What do you think about hierarchical state machine [1] ? >Has it already been through state X? Like everything else, logging >Will it come back to this state in the future? Mentioned in the comment before, there is a transition graph that you can do static analysis on, note that you might run into a halting problem >Is there a route from state Y to state Z? There is a transition graph >State machines are effectively goto writ large... quoting Prof Carl Hewitt of Actor Model, "goto is harmless"[2], function/procedure call is a goto, much like sending an named event while in particular state with/out parameters [1] [link] [2] [this video] note: edited for formatting
Hewitt argues goto is harmless
@TowerTall Jun 2022 Cites it
on HN thread Ask HN: Are there senior devs who liked switching from static to dynamic typing?
Read more
Absolutely I would. Everyone has their opinion about Microsofts products, but the platform and frameworks that underpin them are rock solid, long-time battle-tested in production, and easy to work with as a developer. A .net stack comes with the comforting knowledge that this technology will never be made obsolete. It will undergo active development and will have support for many years to come. One day, long into the future, it will be super seeded by something else. When that happens, you know there will be a migration path because Microsoft has based their own business on it, and they need it for themselves, and all of their customers need it. .net does not go away tomorrow because something shinier showed up. That's nice to know. You will find that you will have a very stable and mature stack that is well integrated with Azure making deployment and testing easy. Was I to build a microservice application, I would not choose Kubernetes. I would choose the Microsoft Service Fabric Actor model over anything else that is out there. Service Fabric is Microsoft Secret Sause. It is the technology that underpins the Azure Platform itself. Service Fabric has a beautiful actor model that makes the development of cloud-based applications as simple as writing a single threaded console application. Service Fabric and Kubernetes: community comparison [1] The Actor Model [2] [1] [link] [2] [this video]
Background on the actor model

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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