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fastrand

v2.3.0 Growing

A simple and fast random number generator

Apache-2.0 OR MIT Edition 2018 MSRV 1.36
Algorithms #random#rand#simple#fast#wyrand

Quick Verdict

  • Not updated for 1+ year
  • Stable API (2.x for 5+ years)
  • Massive adoption (43.9K crates depend on it)
  • Team maintained (2 owners)
  • Permissive license (Apache-2.0 OR MIT)

Security

Checking security advisories...
Downloads
555.8M
Dependents
43.9K
Releases
27
Size
15KB

Deep Insights

📊
Steady growth

39.5M downloads in the last 30 days (1.3M/day), up 20% from the previous period.

🏛️
Foundational crate

43.9K crates depend on fastrand — it's part of the Rust ecosystem's core infrastructure. Removing it from your dependency tree would be extremely difficult.

👤
Prolific maintainer

The primary maintainer publishes 118 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

Stable for 5+ years

The API has been stable (1.x) for over 5 years with 27 releases. This level of maturity means you can depend on it without worrying about breaking changes.

📐
Compact crate

At 15KB, fastrand is lightweight. Small crate size correlates with focused, well-scoped functionality.

🌟
Used by top crates

Notable dependents include indexmap, tempfile, phf_generator, portable-atomic, futures-lite. When high-quality crates choose fastrand, it's a strong quality signal.

Health Breakdown

Maintenance 8/25

Recency, release consistency, active ratio

Quality 21/25

Yanked ratio, deps, size, maturity, features

Community 19/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 11/15

Docs, repo, license, metadata

Download Trend

Daily downloads · last 90 days
1.1M/day avg+62%
0500K1.0M1.5M12/291/162/32/213/113/28

Top Dependents

Version Adoption

v2.3.0
45%
v1.9.0
26%
v2.0.1
11%
v2.1.1
10%
v2.1.0
8%

Release Timeline

27 releasessince 2020
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2020
14
2021
3
2022
2
2023
3
2024
5
2025
2026
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Feature Flags

default =["std"]

jsstd*alloc

README

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Maintainers

Dependencies
6
direct dependencies
Dependents
43.9K
crates depend on fastrand

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