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WASM 3.0 with Andreas Rossberg

Oct 16, 2025
Guest
Andreas Rossberg
Andreas Rossberg, a programming language researcher and key contributor to WebAssembly, dives into the exciting updates of WASM 3.0. He discusses groundbreaking features like garbage collection, which allows languages like Java and Kotlin to thrive. The episode also covers enhancements in module design, security, and multi-memory support, all while connecting them to real-world applications like Google Sheets. Andreas even shares a sneak peek at future developments in threading and async programming, shaping the next era of WebAssembly.
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INSIGHT

WASM 3.0 Unlocks Broad Language Support

  • WebAssembly 3.0 bundles features that let many more languages target it effectively.
  • Garbage collection, exceptions, tail calls and 64-bit addressing are the major enablers.
INSIGHT

Aim For Language Neutrality

  • The goal is for WebAssembly to be a universal, language-independent compilation target.
  • Andreas emphasizes low-level neutrality to avoid favoring any single language design.
ANECDOTE

Users Pushed For 64-Bit Address Space

  • Companies working on blockchain-like distributed computation pressured for larger address space.
  • Andreas recounts users who struggled with the previous 4GB limit and asked for 64-bit addressing.
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