In this episode of WasmAssembly, host Thomas Steiner welcomes Thomas Lively from Google, the new co-chair of the W3C WebAssembly Community Group. Taking over the role from past guest Deepti Gandluri (episode #2), we seize the opportunity to ask Lively the exact same three questions we posed to Deepti—listen back to compare their perspectives! In the second half, the two Thomases dive deep into the proposals Lively is personally championing, covering Custom Descriptors and JS Interop, and the highly-anticipated Shared-Everything Threads.

Chapters:

0:00 - The Wasm team "Thomas" confusion

0:57 - Thomas' way into Google's Wasm team

4:10 - Wasm CG vs. Wasm WG

9:39 - Is Wasm standardization moving slowly?

17:58 - Wasm at Google and the Chrome team

22:33 - The Custom Descriptors and JS Interop proposal

35:02 - The Shared-Everything Threads proposal

43:28 - Wasm, but not

Resources:

• Thomas Lively on LinkedIn → https://goo.gle/45U8uRA

• WebAssembly Community Group → https://goo.gle/3K0qSj3

• From asm.js to Wasm with Emscripten creator Alon Zakai → https://goo.gle/47zQTj9

• CG, WG, W3C, Deepti—Wasm standardization with Deepti Gandluri → https://goo.gle/4ndWX5X

• Custom Descriptors and JS Interop → https://goo.gle/4ggStbY

• WebAssembly threads →​​ https://goo.gle/45Z0kaI

• Shared-Everything Threads → https://goo.gle/47BnLYG

• Thomas Lively on Bluesky → https://goo.gle/4gcm2v8

In this episode of WasmAssembly, your host Thomas Steiner is joined by Ömer Ağacan and Martin Kustermann from the Dart team at Google. They explore Dart, the language behind Flutter, and how Dart nearly landed in V8 alongside JavaScript, and why Flutter doubled down on Dart and WebAssembly Garbage Collection (WasmGC). Ömer and Martin then share insights on Dart’s performance leap from dart2js to dart2wasm, its potential beyond the browser, and what the WasmGC transition means for developers and the broader ecosystem. Finally, they look at Jaspr, Dart-only web apps, or how different browsers are handling WasmGC. This episode again is packed with sharp technical detail and bold visions for the future of WebAssembly.

Resources:

• Dart → https://goo.gle/4kfijgD

• Flutter → https://goo.gle/4kh4jDi

• Before Flutter | Rubber Duck Engineering | Episode #100 → https://goo.gle/4nujV9g

• State of Developer Ecosystem Report → https://goo.gle/4lrmya6

• What's new in Flutter → https://goo.gle/44xx0Gl

• Dart & Flutter momentum at Google I/O 2025 → https://goo.gle/3TgUr1p

• Accessibility in Flutter on the Web → https://goo.gle/4l2xfQB

• Stateful hot reload in DartPad → https://goo.gle/4nokFg1

• WebAssembly (Wasm) compilation → https://goo.gle/3I8Ngpx

• Support for WebAssembly (Wasm) → https://goo.gle/45L0wdR

• WebAssembly Garbage Collection (WasmGC) now enabled by default in Chrome → https://goo.gle/3G7qLAS

• Wasm-feature-detect library → https://goo.gle/4evqS5Y

• A new way to bring garbage collected programming languages efficiently to WebAssembly → https://goo.gle/4keW0rt

• [dart2wasm] Support non-JS wasm runtimes → https://goo.gle/44wr3t3

• Safari bug: Umbrella: Using Canvas image sources between different canvases and canvas types is slow → https://goo.gle/3TmuSvM

• Firefox bug: OffscreenCanvas.transferToImageBitmap incurs a copy → https://goo.gle/3GoIGD2

• Ömer Ağacan on LinkedIn → https://goo.gle/4lA6fYB

• Martin Kustermann on LinkedIn → https://goo.gle/3TffQbc

On this WasmAssembly podcast episode, host Thomas Steiner speaks with David Kircos from Quadratic. They discuss how Quadratic's spreadsheet utilizes WebAssembly to enable scientific computing directly in the browser, leveraging tools like Pyodide, pandas, and numpy. The conversation also covers practical challenges such as bundling large-scale Wasm applications, exploring browser limitations, and Quadratic's integration of AI.

Resources:

• David Kircos on LinkedIn → https://goo.gle/4jcpQg6

• Building on the modern web app architecture → https://goo.gle/4hPpcnH

• Pyodide → https://goo.gle/445YEv9

• Pandas → https://goo.gle/4ldvkcp

• Numpy → https://goo.gle/3E1qSNb

• Esbuild-wasm → https://goo.gle/4hRqNJL

• Using JavaScript in a spreadsheet → https://goo.gle/3XIRk4W

• Making API requests from your spreadsheets → https://goo.gle/3FQQPja

• Quadratic Python roadmap: building a spreadsheet developers love → https://goo.gle/446dLot

• ES module integration proposal → https://goo.gle/3C8wd3L

• AI spreadsheets are here: Quadratic + GPT → https://goo.gle/4hZpFUB

• Database connectors → https://goo.gle/3QXMs8g

• SQLite Wasm → https://goo.gle/3FSn3dW

• Quadratic's GitHub organization → https://goo.gle/4jhWqNY