Async Rust: What is a runtime? Here is how tokio works under the hood

• reqwest

  57 9,095 8.7 Rust

  An easy and powerful Rust HTTP Client

> The big HTTP libraries let you opt out (of async)

At least for reqwest it just wraps the async code in something like `block_on`: https://github.com/seanmonstar/reqwest/blob/5397d2cf8eaecc9f...

And as the sibling comment says, you can do that in your own code. It does still add Tokio to your binary size, and probably start a bunch of worker threads you don't need, but it does work.

• wg-async

  8 363 5.9 Rust

  Working group dedicated to improving the foundations of Async I/O in Rust

  

This is a consequence of runtimes relying on global variables that their core future types are dependent on. Creating abstractions to solve this problem is one of the main goals of the the async working group [0].

[0]: https://github.com/rust-lang/wg-async

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• smol

  9 3,401 7.0 Rust

  A small and fast async runtime for Rust

  

• preemptible-thread

  16 23 5.1 C

  How to preempt threads in user space

There's waiters and polling that only executed your function to progress and there's pending and done. Any help to understand the relationship between the three things would be appreciated.

I wrote a M:N thread scheduler in C, Java and Rust. The C version also can schedule file reading to an IO thread but I'm nowhere near finished.

https://github.com/samsquire/preemptible-thread

Another of my ideas is to rewrite synchronous code into parallel LMAX disruptors. In other words a tree of RingBuffer each line of synchronius code its own event loop. Rather than one event loop multiplexing events from different systems you pipeline every blocking call. I think it would be very fast.

Here's a write-up.

https://github.com/samsquire/ideas4#51-rewrite-synchronous-c...

• ideas4

  26 89 4.6

  An Additional 100 Ideas for Computing https://samsquire.github.io/ideas4/

There's waiters and polling that only executed your function to progress and there's pending and done. Any help to understand the relationship between the three things would be appreciated.

I wrote a M:N thread scheduler in C, Java and Rust. The C version also can schedule file reading to an IO thread but I'm nowhere near finished.

https://github.com/samsquire/preemptible-thread

Another of my ideas is to rewrite synchronous code into parallel LMAX disruptors. In other words a tree of RingBuffer each line of synchronius code its own event loop. Rather than one event loop multiplexing events from different systems you pipeline every blocking call. I think it would be very fast.

Here's a write-up.

https://github.com/samsquire/ideas4#51-rewrite-synchronous-c...

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