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smol-rs
smol
Rust2020–2023
smol-rs / smol

smol

A small and fast async runtime for Rust

10Distinct people
10Mentions
0Explicit recommenders
5.1KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

A small and fast async runtime for Rust

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year10 dated mentions

Observed mentions: 2020-04-27 12:59:02 UTC to 2023-09-26 01:20:27 UTC.

02462020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 7 mentions; 4 submissions, 3 comments20202021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments20212022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2023

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC743
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC000
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC101
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC211

What Hacker News says

10 sources
My understanding is you always need a runtime to play the async game -- something needs to drive the async flow. But there are others on the market, just not without the.. market domination... of tokio. https://github.com/smol-rs/smol looks promising simply for being minimal https://github.com/bytedance/monoio looks potentially easier to work with than tokio https://github.com/DataDog/glommio is built around linux io_uring and seems somewhat promising for performance reasons. I haven't played with any of these yet, because Tokio is unfortunately the path of least resistance. And a bit viral in how it's infected things. But I'm planning on giving glommio at least a whirl.
In The State of Async Rust: Runtimes
This is a reasonable overview with a few caveats - Warp seems to have one of the better api experiences but has significant performance issues. In the async world I think https://github.com/stjepang/smol is going to have a pretty big positive impact on the useability of the whole system so I wouldn't rush to go all in on either async-std or tokio just yet. Last I read it was still having some fairness issues that were next to fix though. There is also https://github.com/withoutboats/ringbahn Which is very disruptive in that io-uring doesn't have a natural async interface?
In Choosing a Rust web framework
vlmutolo·Jun 16, 2020Submission

Ask HN: How do you print code?

I would really like to print out stjepang’s library smol. It’s just a few thousand lines of code and I have a feeling that it would be easier for me to understand on paper. How does anyone do this? I’ve heard that companies sometimes do code reviews on paper, so I figured this would be a solved problem. Still, I couldn’t find a decent solution anywhere. So there’s the question for Ask HN. How in the world does anyone print code in a reasonable way? By “reasonable”, I mean: 1. with line numbers, 2. with syntax highlighting, 3. and preferably some sane separation of source files. Smol: https://github.com/stjepang/smol
7 points · Open discussion
From the article: > Because our code winds up running in other people’s apps we don’t use a full-fledged async runtime like tokio or async-rs since those are optimized for “use all available resources” scenarios like network servers or client applications. Have you considered the recent alternative, smol [1]? Do you have any plans to share source or build scripts for the glue components? How have you been able to incorporate native functionality such as media codecs and screen capture with shared logic written in Rust? Has Rust worked well when you also need to integrate with runtimes such as React Native or Flutter? [1] https://github.com/stjepang/smol
In How we use Rust in our mobile SDK

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