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bumpalo

v3.20.3 Stable

A fast bump allocation arena for Rust.

MIT OR Apache-2.0 Edition 2021 MSRV 1.71.1

Quick Verdict

  • โœ“Actively maintained (updated 3d ago)
  • โœ“Stable API (3.x for 7+ years)
  • โœ“Massive adoption (9.5K crates depend on it)
  • โœ“Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...
Downloads
399.2M
Dependents
9.5K
Releases
56
Size
99KB

Deep Insights

๐Ÿ“ˆ
Strong growth momentum

35.8M downloads in the last 30 days (1.2M/day), up 22% from the previous period.

๐Ÿ”—
Widely adopted

9.5K crates depend on bumpalo. Strong ecosystem adoption means battle-tested code and long-term stability.

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Prolific maintainer

The primary maintainer publishes 101 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

โœ…
Stable for 7+ years

The API has been stable (1.x) for over 7 years with 56 releases. This level of maturity means you can depend on it without worrying about breaking changes.

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Notable yanked versions

23% of releases have been yanked. Check version history before pinning.

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Used by top crates

Notable dependents include hashbrown, wasm-bindgen-macro-support, wasm-bindgen-backend, zopfli, wast. When high-quality crates choose bumpalo, it's a strong quality signal.

Health Breakdown

Maintenance 19/25

Recency, release consistency, active ratio

Quality 16/25

Yanked ratio, deps, size, maturity, features

Community 17/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 15/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
1.0M/day avg+28%
0500K1.0M1.5M2/263/164/34/215/95/26

Top Dependents

Version Adoption

v3.19.0
28%
v3.16.0
27%
v3.17.0
17%
v3.20.2
15%
v3.19.1
12%

Release Timeline

10 releases2 yankedsince 2024
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F
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A
M
J
J
A
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N
D
2024
1
2025
5
2026
4
Less
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Yanked

Feature Flags

stdboxedserdecollectionsallocator_apibench_allocator_api

README

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Maintainers

Dependencies
10
direct dependencies
Dependents
9.5K
crates depend on bumpalo

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