#logging #tracing #metrics #subscriber

no-std tracing-subscriber

Utilities for implementing and composing tracing subscribers

58 releases

0.3.18 Nov 13, 2023
0.3.17 Apr 22, 2023
0.3.16 Oct 6, 2022
0.3.15 Jul 20, 2022
0.0.1-alpha.1 Jul 30, 2019

#4 in Debugging

Download history 984965/week @ 2023-11-05 1118503/week @ 2023-11-12 869397/week @ 2023-11-19 987496/week @ 2023-11-26 976189/week @ 2023-12-03 1018910/week @ 2023-12-10 938335/week @ 2023-12-17 513464/week @ 2023-12-24 834321/week @ 2023-12-31 1061763/week @ 2024-01-07 1094745/week @ 2024-01-14 1119918/week @ 2024-01-21 1187285/week @ 2024-01-28 1206033/week @ 2024-02-04 1221444/week @ 2024-02-11 1158602/week @ 2024-02-18

4,842,640 downloads per month
Used in 7,114 crates (3,090 directly)

MIT license

17K SLoC

Tracing — Structured, application-level diagnostics


Utilities for implementing and composing tracing subscribers.

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Compiler support: requires rustc 1.63+

Supported Rust Versions

Tracing is built against the latest stable release. The minimum supported version is 1.63. The current Tracing version is not guaranteed to build on Rust versions earlier than the minimum supported version.

Tracing follows the same compiler support policies as the rest of the Tokio project. The current stable Rust compiler and the three most recent minor versions before it will always be supported. For example, if the current stable compiler version is 1.69, the minimum supported version will not be increased past 1.66, three minor versions prior. Increasing the minimum supported compiler version is not considered a semver breaking change as long as doing so complies with this policy.


This project is licensed under the MIT license.


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tracing by you, shall be licensed as MIT, without any additional terms or conditions.


~36K SLoC