message_worker 0.6.0

Message Worker is a low-ish level library for Rust for the creation of event-listeners using futures and streams. Notably MW supports non-sync and non-send (i.e. non-thread-safe) contexts within listeners.
Documentation 
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use criterion::{criterion_group, criterion_main, Criterion};
use tokio_stream::StreamExt;
use anyhow::Result;

use message_worker::{blocking, non_blocking, empty_ctx};
use std::rc::Rc;
use std::sync::Arc;

pub fn listener_creation(c: &mut Criterion) {
    c.bench_function("create listener", |b| {
        let executor = tokio::runtime::Runtime::new().unwrap();

        async fn handle_message(_ctx: Arc<()>, _event: ()) -> Result<Option<()>> { Ok(None) }

        b.to_async(executor).iter(move || async {
            let source = tokio_stream::iter(vec![()]);
            non_blocking::listen(source, empty_ctx, handle_message);
        })
    });
}

pub fn listener_process_one(c: &mut Criterion) {
    c.bench_function("listener process 1 message", |b| {
        let executor = tokio::runtime::Runtime::new().unwrap();

        async fn handle_message(_ctx: Arc<()>, _event: ()) -> Result<Option<()>> { Ok(None) }

        b.to_async(executor).iter(move || async {
            let source = tokio_stream::iter(vec![()]);
            non_blocking::listen(source, empty_ctx, handle_message).await.unwrap();
        })
    });
}

pub fn listener_process_many(c: &mut Criterion) {
    c.bench_function("listener process 1000 messages", |b| {
        let executor = tokio::runtime::Runtime::new().unwrap();
        async fn handle_message(_ctx: Arc<()>, _event: ()) -> Result<Option<()>> { Ok(None) }

        b.to_async(executor).iter(move || async {
            let source = futures::stream::repeat(()).take(1000);
            non_blocking::listen(source, empty_ctx, handle_message).await.unwrap();
        })
    });
}

pub fn blocking_listener_creation(c: &mut Criterion) {
    c.bench_function("(blocking) create listener", |b| {
        let executor = tokio::runtime::Runtime::new().unwrap();

        async fn handle_message(_ctx: Rc<()>, _event: ()) -> Result<Option<()>> { Ok(None) }

        b.to_async(executor).iter(move || async {
            let source = tokio_stream::iter(vec![()]);
            blocking::listen(source, empty_ctx, handle_message);
        })
    });
}

pub fn blocking_listener_process_one(c: &mut Criterion) {
    c.bench_function("(blocking) listener process 1 message", |b| {
        let executor = tokio::runtime::Runtime::new().unwrap();

        async fn handle_message(_ctx: Rc<()>, _event: ()) -> Result<Option<()>> { Ok(None) }

        b.to_async(executor).iter(move || async {
            let source = tokio_stream::iter(vec![()]);
            blocking::listen(source, empty_ctx, handle_message).await.unwrap();
        })
    });
}

pub fn blocking_listener_process_many(c: &mut Criterion) {
    c.bench_function("(blocking) listener process 1000 messages", |b| {
        let executor = tokio::runtime::Runtime::new().unwrap();
        async fn handle_message(_ctx: Rc<()>, _event: ()) -> Result<Option<()>> { Ok(None) }

        b.to_async(executor).iter(move || async {
            let source = futures::stream::repeat(()).take(1000);
            blocking::listen(source, empty_ctx, handle_message).await.unwrap();
        })
    });
}

criterion_group!(
    benches,
    listener_creation,
    listener_process_one,
    listener_process_many,
    blocking_listener_creation,
    blocking_listener_process_one,
    blocking_listener_process_many
);
criterion_main!(benches);