Cargo
mio
Lightweight non-blocking I/O.
asynchronousnetworkingnon-blockingrust
github.com/tokio-rs/mioMITThomas de Zeeuw, Carl Lerche23.4M / week7.1k · 884 forks · 264 contributors
Release cadenceEvery 2 months
Last releaseOct 3, 2026
Open advisories0
Changelog quality82% curated
CHANGELOG + GitHub Releases, gaps for some releases
Release history SecurityYou're on
66 older or filtered releases not shown.
Upgrade guides
Breaking changes and a migration checklist for each major versionmio 0.8 → 10.8.11 → 1.2.4Oct 3, 2026 BreakingBreaking2Platform3New12Changed16Fixed16Other1mio 0.7 → 0.80.7.14 → 0.8.11Mar 1, 2024 BreakingBreaking1Security1New12Changed7Fixed12Other5mio 0.6 → 0.70.6.23 → 0.7.14Oct 16, 2021 BreakingBreaking1Security1Platform1Deprecated3New21Changed5Fixed20Other1mio 0.5 → 0.60.5.1 → 0.6.23Dec 1, 2020 BreakingBreaking14Platform6Deprecated5New25Changed13Fixed33Other2mio 0.4 → 0.50.4.4 → 0.5.1Apr 27, 2016 BreakingBreaking7Platform1New1Changed4Fixed1mio 0.3 → 0.40.3.7 → 0.4.4Nov 5, 2015 BreakingBreaking2New2Changed3Fixed3mio 0.2 → 0.30.2.1 → 0.3.7Jul 9, 2015 Unknownmio 0.1 → 0.20.1.0 → 0.2.1Feb 18, 2015 Unknown
VersionChannelDateChangesSecurity
1.2.4 StableOct 3, 2026Fixed31.2.3 StableSep 2, 2026Changed1Fixed21.2.2 StableJul 13, 2026New21.2.1 StableMay 28, 2026Changed2Fixed21.2.0 StableMar 27, 2026New2Changed11.1.1 youStableDec 4, 2025Fixed21.1.0 StableOct 17, 2025Platform1New1Changed3Fixed21.0.4 StableMay 24, 2025Changed2Fixed21.0.3 StableNov 29, 2024New1Changed21.0.2 StableAug 12, 2024Fixed21.0.1 StableJul 23, 2024Changed2Fixed1Other11.0.0 StableJun 14, 2024Breaking2Platform2New6Changed30.8.11 StableMar 1, 2024Security1Fixed1Fix0.8.10 StableDec 6, 2023New10.8.9 StableOct 23, 2023New5Fixed20.8.8 StableMay 30, 2023Fixed10.8.7 StableMay 28, 2023New1Changed2Fixed10.8.6 StableFeb 14, 2023New1Changed1Fixed2Other10.8.5 StableOct 24, 2022Changed2Fixed2Other20.8.4 StableJun 19, 2022New1Other1