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fmmap

v0.5.0 Growing

A flexible and convenient high-level mmap for zero-copy file I/O.

MIT OR Apache-2.0 Edition 2021 MSRV 1.81.0
AsynchronousFilesystemMemory management #file#io#mmap#memory-map#memmap2

Quick Verdict

  • โœ“Actively maintained (updated 19d ago)
  • !Pre-1.0: API may have breaking changes
  • โœ“Trusted by 147 crates
  • โœ“Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...
Downloads
309.5K
Dependents
147
Releases
15
Size
126KB

Deep Insights

๐Ÿ“‰
Download decline

18.7K downloads in the last 30 days, down 31% from the previous period. May indicate migration to alternatives.

๐Ÿ”—
Moderate adoption

147 crates depend on fmmap. Reasonable ecosystem adoption, though not yet a core dependency.

๐Ÿ‘ค
Prolific maintainer

The primary maintainer publishes 150 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 4+ years old, fmmap hasn't reached 1.0 yet. Expect potential API changes between versions.

๐ŸŒŸ
Used by top crates

Notable dependents include pmtiles, oas3-gen, bable, zuffer, rsdupes. When high-quality crates choose fmmap, it's a strong quality signal.

Health Breakdown

Maintenance 17/25

Recency, release consistency, active ratio

Quality 13/25

Yanked ratio, deps, size, maturity, features

Community 12/20

Reverse deps, ownership, ecosystem

Popularity 7/15

Downloads, momentum, growth trend

Documentation 15/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
824/day avg-78%
01K2K4/265/146/16/197/77/24

Top Dependents

Version Adoption

v0.3.3
53%
v0.4.0
37%
v0.3.2
9%
v0.3.0
1%
v0.2.4
1%

Release Timeline

10 releasessince 2022
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2022
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2023
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2026
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Feature Flags

default =["sync"]

smolsync*tokio

README

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Maintainers

Dependencies
18
direct dependencies
Dependents
147
crates depend on fmmap

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