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parking_lot

v0.12.5 Growing

More compact and efficient implementations of the standard synchronization primitives.

MIT OR Apache-2.0 Edition 2021 MSRV 1.71
Concurrency #mutex#thread#rwlock#condvar#once

Quick Verdict

  • !Pre-1.0: API may have breaking changes
  • โœ“Massive adoption (115.4K crates depend on it)
  • โœ“Permissive license (MIT OR Apache-2.0)

Security

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Downloads
912.8M
Dependents
115.4K
Releases
58
Size
47KB

Deep Insights

๐Ÿ“Š
Stable downloads

61.7M downloads in the last 30 days (2.1M/day). Volume is roughly flat compared to the previous period.

๐Ÿ›๏ธ
Foundational crate

115.4K crates depend on parking_lot โ€” it's part of the Rust ecosystem's core infrastructure. Removing it from your dependency tree would be extremely difficult.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 10+ years old, parking_lot hasn't reached 1.0 yet. Expect potential API changes between versions.

๐Ÿ“
Compact crate

At 46KB, parking_lot is lightweight. Small crate size correlates with focused, well-scoped functionality.

๐ŸŒŸ
Used by top crates

Notable dependents include tokio, nix, tokio-util, tracing-subscriber, tokio-stream. When high-quality crates choose parking_lot, it's a strong quality signal.

Health Breakdown

Maintenance 8/25

Recency, release consistency, active ratio

Quality 16/25

Yanked ratio, deps, size, maturity, features

Community 16/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
1.9M/day avg-49%
01.0M2.0M3.0M4/265/146/16/197/77/24

Top Dependents

Version Adoption

v0.12.5
29%
v0.12.3
22%
v0.12.1
20%
v0.11.2
18%
v0.12.4
11%

Release Timeline

10 releasessince 2020
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2020
3
2021
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2022
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2023
2024
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2025
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2026
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Feature Flags

serdenightlyarc_lockowning_refsend_guarddeadlock_detectionhardware-lock-elision

README

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Maintainers

Dependencies
4
direct dependencies
Dependents
115.4K
crates depend on parking_lot

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