WebAssembly Unleashed
Welcome to WebAssembly Unleashed, your monthly dive into the dynamic world of WebAssembly (Wasm). Join F5’s Joel Moses, Oscar Spencer, and Wasm enthusiast Matthew Yacobucci as they unpack the potential, challenges, and innovations within the Wasm ecosystem. Designed for architects, practitioners, technologists, and Wasm enthusiasts, episodes offer: Insightful discussions on Wasm advancements. Practical tips for seamless integration into projects. Interviews with influential figures shaping the Wasm landscape. Strategies for maximizing the potential of WebAssembly. Subscribe now and stay abreast of the latest in Wasm development. Whether you’re a seasoned pro or new to the field, WebAssembly Unleashed is your ticket to unlocking the full power of this revolutionary technology. Tune in for a deep dive into the limitless possibilities of WebAssembly.
Episodes
WebAssembly Unleashed is back with a conversation that goes beyond hype and into what’s actually holding Wasm back from broader adoption. Hosts Joel Moses and Oscar Spencer are joined by Ryan Hunt, Senior Software Engineer at Mozilla and lead of the WebAssembly team in Firefox’s SpiderMonkey engine, to discuss the real state of WebAssembly in 2026, what’s working, and what still needs to change.
Ryan shares a groun...
WebAssembly keeps expanding beyond its original “run C/Rust in the browser” story, and this episode is a tour through the ideas and tooling that are shaping what comes next. Joel Moses and Oscar Spencer are joined by Conrad Watt, PhD., co-chair of the W3C WebAssembly Community Group, a key contributor to the formal memory and concurrency models, and an assistant professor at NTU Singapore, to talk about how formal metho...
WASI Preview 3 is a turning point for WebAssembly outside the browser, and this episode explains why. F5's Joel Moses and Oscar Spencer are joined by Bailey Hayes, CTO of Cosmonic, to break down what “native async” really means for the component model, why it took two years to land, and how it changes the way we build polyglot, composable cloud systems.
At the center of P3 is first-class async and concurrency in the cano...
GPU acceleration is no longer “just for graphics,” and WebAssembly is stepping into a pivotal moment where portable compute means portable capabilities, not just portable code. In this episode of WebAssembly Unleashed, Joel Moses and Matt Yacobucci sit down with Mendy Berger from Cosmonic to unpack the latest shift in the WASI graphics ecosystem: why WASI WebGPU is being treated as the stable foundation, while higher-le...
Debugging is where real engineering happens, and WebAssembly is reaching the point where “you can instrument it” isn’t good enough. In this episode of WebAssembly Unleashed, Joel Moses and Oscar Spencer sit down with Elizabeth Gilbert, a PhD candidate at Carnegie Mellon, to talk about Whamm: a DSL and framework designed to make instrumentation in Wasm less of a one-off engineering project and more of a repeatable,...
AI is making code generation feel effortless, but it’s also flooding systems with more untrusted, machine-written logic than most teams are prepared to safely run. In this episode of WebAssembly Unleashed, Joel Moses and Oscar Spencer zoom out on what that shift means for WebAssembly, security, and the future of software development, with special guest Ben Titzer, Director of the WebAssembly Research Institute at Carnegie Mel...
WebAssembly Unleashed goes hands-on with a topic that shows up every time polished architectures collide with real production: programmability. Coming to you from F5's AppWorld 2026, hosts Joel Moses and Oscar Spencer are joined by WorldTech IT's Austin Geraci and Josh Brooks to talk about what actually happens when customers need traffic behavior that “shouldn’t exist,” but still has to work reliably at scale.
The...
WebAssembly is usually framed as an application runtime story, but at AppWorld 2026 in Las Vegas, WebAssembly Unleashed shifts the spotlight to a more urgent frontier: data. As AI architectures get hungrier and more distributed, performance and security constraints are moving closer to the data store itself. In this episode, Joel Moses and co-host Oscar Spencer explore why WebAssembly components could become the connective tissue b...
In this episode of WebAssembly Unleashed, hosts Joel Moses, Oscar Spencer, and Matt Yacobucci are joined by DevCentral Community Evangelist, Jason Rahm, to discuss programmability in the data plane. Through Jason's insights and use cases as both a former F5 customer and a current DevCentral maintainer they dig into the lessons learned from F5's iRules that Wasm should take note of.
Tune in to understand the programmability pai...
In this episode of WebAssembly Unleashed, hosts Joel Moses and Oscar Spencer kick things off with updates on the upcoming Wasm.IO conference in Barcelona and the latest buzz around WASI Preview 3 before diving into an in-depth conversation with guest Ralph Squillace on Microsoft's Wasm strategy.
Ralph shares his journey in open source, from the early adoption of Linux at Microsoft to the rise of containers and the growing impact of ...
Join F5's Joel Moses, guest host Pat Hickey, and Microsoft Developer Advocate Yosh Wuyts as they dive deep into Microsoft's new tool, Wassette, designed to enhance the security and functionality of AI agents through WebAssembly. Learn about Wassette's sandboxing capabilities, its design components like Wasmtime, and its integration with various programming languages. Discover how Wassette leverages the component model to offer a sa...
Join hosts Joel Moses, Oscar Spencer, and Matt Yacobucci, along with special guest Pat Hickey, for part two of their in-depth discussion on the latest WebAssembly proposals and advancements. This episode dives into the phase three, phase two, and phase one proposals in development, covering critical topics such as ESM integration, wide arithmetic, stack switching, and the Wasm component model. The team debates the significance of t...
Get ready to unleash the raw truth about WebAssembly! In this episode of WebAssembly Unleashed, hosts Joel Moses, Oscar Spencer, and Matt Yacobucci are joined by guest Pat Hickey for a no-holds-barred deep dive into the latest proposals and advancements shaking up the WebAssembly space. From phase five proposals like tail calls and extended constant expressions to the thorny complexities of garbage collection, multiple memories, an...
Join hosts Joel Moses and Oscar Spencer as they dig into recent developments in the world of WebAssembly, starting with a look at Microsoft's Wassette, an initiative utilizing Wasm to enhance AI agent security. Then hear from special guests Khagan (Khan) Karimov and Arjun Ramesh, two doctoral candidates passionate about innovative WebAssembly research. Hear about Khan's focus on fuzzing Wasm implementations to root out security vul...
Join Joel Moses, Matthew Yacobucci, and guest-host Chris Fallin as they dive into the maturation of WebAssembly technologies and their implementation. Special guest Oliver Medhurst, a former Mozilla engineer, joins the conversation to talk about his project, Porffor, a unique compiler kit for JavaScript that allows ahead-of-time compilation to WebAssembly. The discussion covers the challenges and benefits of ahead-of-time compilati...
Join hosts Joel Moses, Oscar Spencer, and Matt Yacobucci as they dive deep into the world of formal verification with special guest Chris Fallin. In this episode of WebAssembly Unleashed, the team discusses the importance of formal verification in software development, particularly for WebAssembly. Chris, a co-author of the Cranelift compiler and Mozilla alum, explains the concept of formal verification, its significance, and how i...
Joins hosts Joel Moses and Oscar Spencer as they delve into the world of WebAssembly with special guest Andreas Rossberg, co-designer of the WebAssembly specification. Andreas shares insights on SpecTec, a domain-specific language designed to streamline and verify the WebAssembly specification. The discussion covers the evolution of SpecTec, its impact on WebAssembly proposals, and future possibilities for its application. Addition...
Join Joel Moses, Oscar Spencer, and Matt Yacobucci as they discuss the latest news and recent developments in WebAssembly, such as Zig 0.140 and projects like running Linux inside a PDF file. This episode features special guest Nick Fitzgerald, a notable contributor to WasmTime and CraneLift, who explains the concept of garbage collection in programming. The discussion covers garbage collection in the context of WebAssembly, ...
Join hosts Joel Moses, Oscar Spencer, and Matthew Yacobucci as they discuss recent WebAssembly advancements, such as data science in browsers with WebR, LibreOffice now running as ZetaOffice, and a unique case study from Dagger.IO on replacing a React front end with Go and WebAssembly. The team is joined by special guest, journalist and analyst Bruce Gain, who shares his insights on the impact of WebAssembly in gaming and its appli...
Join hosts Joel Moses, Oscar Spencer, and Matthew Yacobucci as they take a retrospective look at WebAssembly's exciting developments from 2024 and share their insightful predictions for 2025. This special episode covers groundbreaking advancements in WebAssembly core technology, the WASI ecosystem, and highlights notable progress from previous guests like Bailey Hayes, Pat Hickey, Chris Dickinson, and more. Discover the evolving tr...
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