Pollster

Pollster is an incredibly minimal async executor for Rust that lets you block a thread on the result of a future.

let my_fut = async {};
let result = pollster::block_on(my_fut);

That's it. That's all it does. Nothing more. No dependencies, no complexity. No need to pull in 50 crates to evaluate a future.

Note that pollster will not work for arbitrary futures because some require a specific runtime or reactor. See here for more information about when and where pollster may be used. However, if you're already pulling in the required dependencies to create such a future in the first place, it's likely that you already have a version of block_on in your dependency tree that's designed to poll your future, so use that instead.