Tuesday, October 20, 2026

Async/Await languages design

A Design Space Exploration of Async/Await @brown.edu

Many programming languages now provide the async/await keywords for expressing concurrency. The design rationale is pretty consistent: to make concurrent programs look more like straight-line code (see: Python, Rust, or Swift). We therefore describe the paradigm which encompasses async/await as straight-line asynchrony, as opposed to using event loops or callbacks.

...how similar or different is async/await between languages?

The short answer is a lot more different than expected.




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