Asynchronous programming

Asynchronous programming is a form of programming where the programs execution is non-linear.

This is achieved by implementing “futures” or “promises”, which will return a value at some point, but not immediately. It breaks the flow of execution that is typically expected from reading source code.

In Rust, this is achieved by the async and await keywords.

Async is typically a better option if the program is I/O bound instead of CPU bound.

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