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68

heapless

v0.9.2 Growing

`static` friendly data structures that don't require dynamic memory allocation

MIT OR Apache-2.0 Edition 2021 MSRV 1.87

Quick Verdict

  • !Pre-1.0: API may have breaking changes
  • โœ“Massive adoption (6.1K crates depend on it)
  • โœ“Team maintained (4 owners)
  • โœ“Permissive license (MIT OR Apache-2.0)

Security

Checking security advisories...
Downloads
66.4M
Dependents
6.1K
Releases
55
Size
128KB

Deep Insights

๐Ÿ“ˆ
Strong growth momentum

8.6M downloads in the last 30 days (285.7K/day), up 36% from the previous period.

๐Ÿ”—
Widely adopted

6.1K crates depend on heapless. Strong ecosystem adoption means battle-tested code and long-term stability.

๐Ÿ‘ค
Prolific maintainer

The primary maintainer publishes 92 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 8+ years old, heapless hasn't reached 1.0 yet. Expect potential API changes between versions.

๐ŸŒŸ
Used by top crates

Notable dependents include ipnet, der, aead, zvariant, faster-hex. When high-quality crates choose heapless, it's a strong quality signal.

Health Breakdown

Maintenance 13/25

Recency, release consistency, active ratio

Quality 13/25

Yanked ratio, deps, size, maturity, features

Community 19/20

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
207K/day avg+103%
0100K200K300K400K12/291/162/32/213/113/28

Top Dependents

Version Adoption

v0.8.0
57%
v0.7.17
26%
v0.7.16
12%
v0.6.1
3%
v0.9.2
1%

Release Timeline

55 releases3 yankedsince 2017
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2017
3
2018
16
2019
7
2020
5
2021
12
2022
7
2023
2
2024
2025
3
2026
Less
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Yanked

Feature Flags

ufmtallocbytesdefmtserdenightlyzeroizempmc_largeportable-atomicembedded-io-v0.7portable-atomic-critical-sectionportable-atomic-unsafe-assume-single-core

README

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Maintainers

Dependencies
12
direct dependencies
Dependents
6.1K
crates depend on heapless

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