blocking

A thread pool for isolating blocking I/O in async programs

1.6.2 164M downloads/mo #582 most downloaded on crates.io smol-rs/blocking

What this package is like to depend on

Last release 1 years ago

06 Jul 2025

Release timing varies

gaps range from 2 weeks to 1.1 years

Nearly every release is documented

notes for 31 of 31 stable releases

1 version withdrawn

withdrawn after publishing

7 years old

32 releases · first in 2019

0 releases in the last 12 months

see the full history below

Release timeline

32 releases · Jun 2019 to Jul 2025

2020 2021 2022 2023 2024 2025 2026

Release Pre-release Withdrawn

Releases

latest 32

1.6.2 06 Jul 2025
Release notes
- Fix build failure with minimal-versions. (#71)
Open source →
Release notes
- Fix build failure with minimal-versions. (#71)
Open source →
1.6.1 26 May 2024
Release notes
- Remove our dependency on the async-lock crate. (#59)
Open source →
Release notes
- Remove our dependency on the async-lock crate. (#59)
Open source →
1.6.0 27 Apr 2024
Release notes
- Panics that occur in unblocked functions are now propagated to the calling
  function. (#58)
- Add a new optional tracing feature. When enabled, this feature adds logging
  to the implementation. By default it is disabled. (#60)
- Remove the unused fastrand dependency. (#61)
Open source →
Release notes
- Panics that occur in unblocked functions are now propagated to the calling function. (#58)
- Add a new optional tracing feature. When enabled, this feature adds logging to the implementation. By default it is disabled. (#60)
- Remove the unused fastrand dependency. (#61)
Open source →
1.5.1 13 Nov 2023
Release notes
- Fix compilation on WebAssembly targets (#54).
Open source →
Release notes
- Fix compilation on WebAssembly targets (#54).
Open source →
1.5.0 06 Nov 2023 withdrawn
Release notes
- Bump MSRV to 1.61. (#50)
Open source →
Release notes
- Bump MSRV to 1.61. (#50)
Open source →
1.4.1 08 Oct 2023
Release notes
- Change the error_span in grow_pool into trace_span. (#45)
Open source →
Release notes
- Change the error_span in grow_pool into trace_span. (#45)
Open source →
1.4.0 25 Sep 2023
Release notes
- Bump MSRV to 1.59. (#44)
- Remove the unused memchr dependency. (#38)
- Extract read/write pipes into the piper crate, which this crate now uses. (#37)
- Mark as forbid(unsafe_code) (#37).
- Set up logging using tracing. (#40)
Open source →
Release notes
- Bump MSRV to 1.59. (#44)
- Remove the unused memchr dependency. (#38)
- Extract read/write pipes into the piper crate, which this crate now uses. (#37)
- Mark as forbid(unsafe_code) (#37).
- Set up logging using tracing. (#40)
Open source →
1.3.1 07 Apr 2023
Release notes
- Gracefully handle the inability to spawn threads. (#31)
Open source →
Release notes
- Gracefully handle the inability to spawn threads. (#31)
Open source →
1.3.0 26 Nov 2022
Release notes
- Remove the dependency on the once_cell crate to restore the MSRV. (#30)
Open source →
Release notes
- Remove the dependency on the once_cell crate to restore the MSRV. (#30)
Open source →
1.2.0 12 Mar 2022
Release notes
- Return Task from unblock instead of returning opaque type. (#25)
Open source →
1.1.0 10 Nov 2021
Release notes
- Add an environment variable to customize the maximum number of threads. (#21)
Open source →
1.0.2 09 Oct 2020
Release notes
- Update futures-lite.
Open source →
1.0.1 05 Oct 2020
Release notes
- Use async-task.
Open source →
1.0.0 07 Sep 2020
Release notes
- Stabilize.
Open source →
0.6.1 28 Aug 2020
Release notes
- Add probabilistic yielding to improve fairness.
Open source →
0.6.0 26 Aug 2020
Release notes
- Remove the unblock! macro.
Open source →
0.5.2 18 Aug 2020
Release notes
- Implement Sync for Unblock.
Open source →
0.5.1 14 Aug 2020
Release notes
- Add Unblock::with_capacity().
- Add unblock() function.
- An optimization in task spawning.
Open source →
0.5.0 21 Jul 2020
Release notes
- Simplify the API to just unblock! and Unblock.
Open source →
0.4.7 19 Jul 2020
Release notes
- Simplify dependencies for faster compilation.
Open source →
0.4.6 17 Jun 2020
Release notes
- Update doc comment on Unblock.
Open source →
0.4.5 17 Jun 2020
Release notes
- Implement AsyncSeek/Seek for Unblock/BlockOn.
Open source →
0.4.4 30 May 2020
Release notes
- Remove the initial poll in block_on that caused lost wakeups.
Open source →
0.4.3 23 May 2020
Release notes
- Fix a bug where a closed Receiver causes panics.
Open source →
0.4.2 17 May 2020
Release notes
- Start thread numbering from 1.
Open source →
0.4.1 17 May 2020
Release notes
- Attach names to spawned threads.
Open source →
0.4.0 17 May 2020
Release notes
- Remove Future impl for Blocking.
- Add unblock().
- Rename blocking! to unblock!.
- Rename Blocking to Unblock.
- Add block_on(), block_on!, and BlockOn.
Open source →
0.3.2 11 May 2020
Release notes
- Make Blocking implement Send in more cases.
Open source →
0.3.1 10 May 2020
Release notes
- Add Blocking::with_mut().
Open source →
0.3.0 10 May 2020
Release notes
- Remove Blocking::spawn().
- Implement Future for Blocking only when the inner type is a FnOnce.
Open source →
0.2.0 09 May 2020
Release notes
- Initial version
Open source →
0.1.0 15 Jun 2019
Release notes
- Reserved crate name
Open source →

blocking

What this package is like to depend on

Release timeline

Releases

Every package, every release, already written down.