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libffi

v5.1.1 Stable

Rust bindings for libffi

MIT OR Apache-2.0 Edition 2021 MSRV 1.78
Development tools::FFI #ffi#closure#c#libffi

Quick Verdict

  • Actively maintained (updated 22d ago)
  • Stable API (5.x for 10+ years)
  • Trusted by 561 crates
  • Tiny footprint (33KB, 3 deps)
  • Permissive license (MIT OR Apache-2.0)

Security

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Downloads
3.0M
Dependents
561
Releases
47
Size
33KB

Deep Insights

📊
Stable downloads

176.8K downloads in the last 30 days (5.9K/day). Volume is roughly flat compared to the previous period.

🔗
Moderate adoption

561 crates depend on libffi. Reasonable ecosystem adoption, though not yet a core dependency.

Stable for 10+ years

The API has been stable (1.x) for over 10 years with 47 releases. This level of maturity means you can depend on it without worrying about breaking changes.

🪶
Minimal dependencies

Only 3 direct dependencies. Lean dependency tree means faster builds and lower supply chain risk.

📐
Compact crate

At 33KB, libffi is lightweight. Small crate size correlates with focused, well-scoped functionality.

🌟
Used by top crates

Notable dependents include deno_ffi, scryer-prolog, mpi, rustpython-vm, uiua. When high-quality crates choose libffi, it's a strong quality signal.

Health Breakdown

Maintenance 17/25

Recency, release consistency, active ratio

Quality 23/25

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 · last 90 days
6K/day avg-50%
05K10K15K4/265/146/16/197/77/24

Top Dependents

Version Adoption

v3.2.0
54%
v5.1.0
24%
v3.0.1
8%
v4.1.1
8%
v4.1.2
5%

Release Timeline

10 releasessince 2022
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2022
1
2023
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2024
2025
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2026
2
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Feature Flags

default =["std"]

std*systemcomplexcheck_only

README

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Maintainers

Dependencies
3
direct dependencies
Dependents
561
crates depend on libffi

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