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