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smol-rs

12 indexed repositories · View on GitHub

smol
A small and fast async runtime for Rust

Rust · 5068 stars
async-channel
Async multi-producer multi-consumer channel

Rust · 948 stars
polling
Portable interface to epoll, kqueue, event ports, and wepoll

Rust · 766 stars
fastrand
A simple and fast random number generator

Rust · 604 stars
event-listener
Notify async tasks or threads

Rust · 515 stars
async-executor
Async executor

Rust · 459 stars
blocking
A thread pool for isolating blocking I/O in async programs

Rust · 385 stars
async-lock
Async synchronization primitives

Rust · 292 stars
async-process
Async interface for working with processes

Rust · 216 stars
async-compat
Compatibility adapter between tokio and futures

Rust · 196 stars
async-fs
Async filesystem primitives

Rust · 151 stars
piper
An asynchronous single-consumer single-producer pipe for bytes

Rust · 17 stars

Beginner friendly Everything

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Update to focused 0.100 windows crates to follow Microsoft guidance Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

smol-rs/polling#267 · 6 comments · Opened Sep 17, 2026
`port::Poller::modify` and `delete` might be unsound. Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

smol-rs/polling#266 · 1 comment · Opened Aug 24, 2026
`Executor::grow_pool` livelocks at 100 % CPU when `thread::Builder::spawn` fails persistently Open

Difficulty 3/5 1-2 days Newbie friendliness 74/100

smol-rs/blocking#79 · Opened Aug 24, 2026
Website in Readme and documentation no longer valid Open

Difficulty 1/5 1-3 hours Newbie friendliness 82/100

smol-rs/event-listener#167 · Opened Jul 28, 2026
Global RNG: seed with a slightly more unique identifier? Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

smol-rs/fastrand#130 · 2 comments · Opened Jun 22, 2026
WyRand fails collisions tests—maybe switching to a generator with more state? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

smol-rs/fastrand#128 · 14 comments · Opened May 11, 2026
`async_native_tls` / `native_tls` error when running `hyper-server` example Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

smol-rs/smol#375 · Opened Mar 23, 2026
w1rand Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

smol-rs/fastrand#123 · 2 comments · Opened Mar 22, 2026
[compiler bug] piper fails to compile for Xtensa-based ESP32 targets Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

smol-rs/piper#33 · 4 comments · Opened Mar 17, 2026
Allow build executor Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

smol-rs/smol#370 · 2 comments · 1 reaction · Opened Feb 20, 2026
`Child::output` should have a version that takes a `&mut Child` Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

smol-rs/async-process#108 · Opened Feb 15, 2026
OpenBSD: kqueue fd accounting causing errors in Niri Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

smol-rs/polling#262 · 4 comments · Opened Feb 10, 2026
try_tick does not reschedule tasks Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

smol-rs/async-executor#158 · Opened Jan 17, 2026
Does a task-cancel interrupt a TcpStream read await? Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

smol-rs/smol#364 · 4 comments · Opened Jan 10, 2026
Example for multi-threaded priority executor which doesn't run forever Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

smol-rs/async-executor#156 · 1 comment · Opened Dec 25, 2025
Send singular message without `Clone` Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

smol-rs/event-listener#159 · 1 reaction · Opened Dec 15, 2025
Is it possible to make the internal lock optional? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

smol-rs/polling#254 · 1 comment · Opened Nov 21, 2025
Is unblock runtime agnostic? Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

smol-rs/blocking#77 · 1 comment · Opened Nov 20, 2025
Tokio console support Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

smol-rs/async-executor#153 · 1 reaction · Opened Nov 18, 2025
Should clarify the behavior when dropping a Task handle Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

smol-rs/blocking#76 · Opened Oct 31, 2025
Document cancel safety guarantees. Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

smol-rs/async-channel#111 · 2 comments · Opened Oct 28, 2025
Question: What is the difference between using `#![apply(smol_macros::main!)]` and `ex.spawn` as shown in the example, and using `async_global_executor::block_on(async { })` and `async_global_executor::spawn`? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/smol#357 · 1 comment · Opened Oct 22, 2025
poller wait() code example does not delete() on earlier ? error return. Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

smol-rs/polling#253 · Opened Sep 22, 2025
Support Custom Allocator of Channel Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/async-channel#110 · 2 comments · Opened Aug 9, 2025
Document `RwLockWriteGuard::downgrade()` guarantees Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

smol-rs/async-lock#100 · 1 comment · Opened Jul 23, 2025
add new `io_uring` on linux? should be widely adopted enough since 2025 Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/polling#245 · 4 comments · Opened Jul 21, 2025
into_inner methods to access sync file Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

smol-rs/async-fs#49 · 1 comment · Opened Jul 21, 2025
Update minimal subcrates versions? Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

smol-rs/smol#344 · 1 comment · Opened Jul 7, 2025
`poll_write` May Cause an Infinite Loop in the Upper Layer Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

smol-rs/blocking#70 · 1 comment · Opened Jun 11, 2025
WASM compatibility Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

smol-rs/async-compat#43 · 1 comment · Opened May 13, 2025
Is the `StaticExecutor` not updating the `Task`'s reference count correctly? Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

smol-rs/async-executor#140 · 7 comments · Opened Mar 31, 2025
Difference with `tokio::task::spawn_blocking`? Open

Difficulty 3/5 1-2 days Newbie friendliness 30/100

smol-rs/blocking#68 · 1 comment · Opened Mar 24, 2025
Auto-vectorization Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

smol-rs/fastrand#101 · 1 reaction · Opened Mar 17, 2025
Support disjoint polls on separate threads Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/polling#227 · 2 comments · Opened Feb 21, 2025
Feature request: Support `task_local!` Open

good first issue

Difficulty 5/5 Over a week Newbie friendliness 30/100

smol-rs/async-executor#139 · 2 comments · 1 reaction · Opened Feb 17, 2025
Question: does `smol` have something similar to `tokio::task_local!` and `async_std::task_local!`? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

smol-rs/smol#329 · 3 comments · Opened Jan 27, 2025
Use kqueue on haiku Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

smol-rs/polling#223 · 2 comments · Opened Dec 25, 2024
Add "exists" operation Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

smol-rs/async-fs#41 · 1 comment · Opened Dec 1, 2024
Not working with TcpStream Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

smol-rs/blocking#65 · 2 comments · Opened Oct 15, 2024
Expose the guard API to allow users to enter tokio runtime Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

smol-rs/async-compat#34 · 1 reaction · Opened Sep 22, 2024
RwLock.write() and Mutex.lock() hang forever Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/async-lock#91 · 15 comments · 1 reaction · Opened Sep 8, 2024
Better docs on multi-threaded executor Open

smol-rs/smol#317 · 4 comments · 3 reactions · 1 assignee · Opened Aug 18, 2024
Tests mpmc_stream and mpmc fails on s390x: assertion `left == right` failed Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

smol-rs/async-channel#99 · 4 comments · Opened Jul 29, 2024
Make it so `Event::is_interrupt` corresponds to EV_EOF on kqueue platforms Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

smol-rs/polling#213 · Opened Jul 25, 2024
Use ProcessSocketNotifications on Windows? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/polling#208 · 1 comment · Opened Jun 9, 2024
Equivalent of `tokio::sync::watch` Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

smol-rs/smol#311 · 3 comments · 3 reactions · Opened Jun 8, 2024
Expose async-broadcast in smol Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

smol-rs/smol#310 · 1 comment · 2 reactions · Opened Jun 8, 2024
Sending can yield the thread Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

smol-rs/async-channel#96 · 2 comments · Opened Jun 3, 2024
Equivalent of `tokio::task::JoinSet` Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

smol-rs/smol#308 · 4 comments · Opened Jun 2, 2024
StaticLocalExecutor usage example? Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

smol-rs/async-executor#119 · 1 comment · 1 reaction · Opened May 28, 2024

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