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55

im

v15.1.0 Growing

Immutable collection datatypes

MPL-2.0+ Edition 2018 MSRV 1.46.0
Data structures #persistent#hamt#immutable#b-tree#rrb-tree

Quick Verdict

  • โœ•Not updated for 3+ years
  • โœ“Stable API (15.x for 8+ years)
  • โœ“Massive adoption (3.4K crates depend on it)

Security

Checking security advisories...
Downloads
23.9M
Dependents
3.4K
Releases
36
Size
117KB

Deep Insights

๐Ÿ“ˆ
Strong growth momentum

1.1M downloads in the last 30 days (36.8K/day), up 26% from the previous period.

๐Ÿ”—
Widely adopted

3.4K crates depend on im. Strong ecosystem adoption means battle-tested code and long-term stability.

โš ๏ธ
Single maintainer risk

im has only 1 owner despite 3.4K dependents. This is a bus-factor concern โ€” consider the implications for long-term support.

โœ…
Stable for 8+ years

The API has been stable (1.x) for over 8 years with 36 releases. This level of maturity means you can depend on it without worrying about breaking changes.

โš ๏ธ
Notable yanked versions

11% of releases have been yanked. Check version history before pinning.

๐ŸŒŸ
Used by top crates

Notable dependents include solana-frozen-abi, solana-runtime, metrics-runtime, zksync_consensus_network, druid. When high-quality crates choose im, it's a strong quality signal.

Health Breakdown

Maintenance 6/25

Recency, release consistency, active ratio

Quality 13/25

Yanked ratio, deps, size, maturity, features

Community 14/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 14/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
28K/day avg+79%
020K40K60K12/291/162/32/213/113/28

Top Dependents

Version Adoption

v15.1.0
84%
v15.0.0
9%
v14.3.0
3%
v12.3.4
2%
v13.0.0
1%

Release Timeline

36 releases4 yankedsince 2017
J
F
M
A
M
J
J
A
S
O
N
D
2017
12
2018
12
2019
8
2020
3
2021
2022
1
2023
2024
2025
2026
Less
More|
Yanked

Feature Flags

debug

README

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Maintainers

Dependencies
20
direct dependencies
Dependents
3.4K
crates depend on im

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