Flume

A blazingly fast multi-producer, multi-consumer channel.

let (tx, rx) = flume::unbounded();

thread::spawn(move || (0..10).for_each(|i| { tx.send(i); }));

let received = rx
    .iter()
    .sum();

assert_eq!((0..10).sum(), received);

Why Flume?

• Featureful: Unbounded, bounded and rendezvous queues
• Fast: Always faster than std::sync::mpsc and sometimes crossbeam-channel
• Safe: No unsafe code anywhere in the codebase!
• Flexible: Sender and Receiver both implement Send + Sync + Clone
• Familiar: Drop-in replacement for std::sync::mpsc
• Capable: Additional features like MPMC support and send timeouts/deadlines
• Simple: Few dependencies, minimal codebase, fast to compile
• Asynchronous: async support, including mix 'n match with sync code
• Ergonomic: Powerful select-like interface

Usage

To use Flume, place the following line under the [dependencies] section in your Cargo.toml:

flume = "x.y"

Benchmarks

Although Flume has its own extensive benchmarks, don't take it from here that Flume is quick. The following graph is from the crossbeam-channel benchmark suite.

Tests were performed on an AMD Ryzen 7 3700x with 8/16 cores running Linux kernel 5.11.2 with the bfq scheduler.

License

Flume is licensed under either of:

• Apache License 2.0, (http://www.apache.org/licenses/LICENSE-2.0)

• MIT license (http://opensource.org/licenses/MIT)