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This podcast is available on 4 platforms including Apple Podcasts, Spotify, and more. You can also use the RSS feed directly.

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Yes, this podcast regularly features guests.

WebAssembly Unleashed

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by F5

5.0(2 reviews)

30 episodes

Updated Daily

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Podcast Overview

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.

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11/14/2023

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34 minutes

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18 episodes over 1.5 years

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Recent Episodes

June 17, 2026

Composable instrumentation in the Component Model | WebAssembly Unleashed

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, portable capability. Elizabeth explains how she arrived at WebAssembly through the developer tooling and fault-injection world, and why existing instrumentation approaches in Wasm often boil down to fragile bytecode rewriting. Whamm reframes the problem as “match and inject,” letting you express instrumentation at a higher level and then compile the probe logic as WebAssembly itself. That means you can write the instrumentation in any language that compiles to Wasm, while Whamm handles the hard parts: matching at opcodes, function entry/exit, branches and branch targets, imports, and other low-level control-flow details that are easy to get wrong. The conversation also covers an important evolution: running Whamm through an engine interface instead of pure rewriting. In that model, the runtime understands probes as probes, giving stronger isolation guarantees and opening the door to a standardized, portable instrumentation mechanism across engines. Finally, Elizabeth previews Splicer, her component-model work that can interpose on edges in a component composition graph and visualize those relationships, plus a candid look at where things get hard, especially around resources. If you care about observability, debugging, security analysis, or performance tooling for WebAssembly, this is a clear look at why the future may be less about more tools and more about better ways to describe instrumentation.

May 15, 2026

AI + Wasm: Sandboxing codegen, fixing Wasmtime fast, & new research | WebAssembly Unleashed

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 Mellon and one of the principal creators of the WebAssembly standard. They start with a timely catalyst: a Bytecode Alliance Wasmtime security sprint where engineers used new AI models to stress-test the runtime and patch 11 vulnerabilities in just three weeks. From there, the conversation tackles the bigger question: if AI dissolves language boundaries for developers, does language still matter at runtime? Ben argues that it does, and that WebAssembly’s deterministic execution, portability, and lightweight sandboxing become even more valuable when code is generated on demand and needs to run safely across machines. The episode digs into how researchers are using WebAssembly to sandbox AI-generated code, why containers alone can be too heavyweight or too permissive, and how capability-based security is still underused as teams connect agents to tools and APIs. Ben also shares where AI is useful today, from generating tests to surfacing corner cases, and where it still struggles, especially with architecture and abstraction. The discussion closes with a look at active research in the Wasm ecosystem, including instrumentation languages, component interposition, dynamic language performance, kernel interfaces, and deterministic record-and-replay, plus an honest take on how AI is reshaping how students learn and how educators assess real understanding. Read the Wasmtime blog: <a href="https://bytecodealliance.org/articles/wasmtime-security-advisories">https://bytecodealliance.org/articles/wasmtime-security-advisories</a>

April 16, 2026

Why Programmability Still Wins: iRules, APIs, and Wasm (WorldTech IT) | WebAssembly Unleashed

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 conversation moves from the reality of messy APIs and legacy constraints to the practical value of a programmable data plane. Austin and Josh share examples ranging from deterministic routing based on fields buried inside JSON payloads to deeply unglamorous but essential protocol surgery, including binary-level LDAP manipulation and SAML/OAuth edge cases that break whenever an upstream system refuses to behave. The common thread is clear: when the app team can’t change the app, the network and security layers become the integration surface. They also dig into why language choice still matters, even in the age of AI-assisted coding. Tooling ecosystems, native support for things like JSON parsing, and access to third-party libraries can turn “weeks of custom glue” into something maintainable. That’s where WebAssembly enters the picture: portable components and familiar languages that can run close to the traffic without forcing teams into legacy scripting or vendor-specific dialects. If you’re building AI-enabled applications, modernizing older systems, or trying to keep pace with constantly changing APIs, this episode makes the case that programmable middleware isn’t optional. It’s how you avoid waiting on feature releases, adapt safely, and turn a good fit into a production-ready one.

30 total episodes available

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What is 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.
How often does this podcast release new episodes?: This podcast updates daily.
Where can I listen to this podcast?: This podcast is available on 4 platforms including Apple Podcasts, Spotify, and more. You can also use the RSS feed directly.
Does this podcast accept guests?: Yes, this podcast regularly features guests.

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