Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-21 07:39 UTC

RoaringBitmap / croaring-rs

Rust FFI wrapper for CRoaring

C · C++ · RustApache-2.0★ 174 stars⑂ 44 forkssince Aug 2016View on GitHub ↗

#rust #croaring #wrapper #roaring-bitmaps #bitset #bitset-library

RoaringBitmap/croaring-rs holds a health index of 86 out of 100, placing it in the Excellent band. It scores highest on Vitality (79/100) and lowest on Community & Adoption (60/100). It was last updated 1 day ago. 2 contributors account for most of its recent work.

overall / 100

Excellent

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met

Excellent80-92Strong across the board; minor gaps

Good65-79Healthy; gaps are limited and manageable

Moderate50-64Acceptable with notable gaps; review recommended

Weak35-49Material weaknesses across several areas

At Risk20-34Significant weaknesses; adoption warrants caution

Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 72 is calibrated to 86 on the published index scale (record calibration 2026-08-02).

Ownership

Roaring bitmaps: A better compressed bitsetOrganization

198 followers22 public repossince Jan 2016

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Package ecosystems

Registry	Package	Version	Downloads / mo	Versions	Last publish	Tags
crates.io	croaring	2.8.0	53,848	53	1 day ago	bitmap croaring roaringbitmap api-bindings data-structures
crates.io	croaring-sys	5.2.2	54,356	55	1 day ago	data-structures external-ffi-bindings

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

79Good · 21% of overall

Development activity

70Good

How it's scored

36/36	Push recency — last push 1 days ago
9.7/36	Commit cadence — 14/52 weeks with commits
14.8/18	Commit volume — 43 commits in the last year
10/10	OpenSSF Scorecard: Maintained — 14 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10

Inputs used

commits_last_year	43
human_commit_share	0.77
days_since_last_push	1
active_weeks_last_year	14

Release discipline

92Excellent

How it's scored

27/27	Ships releases — 45 releases published
36/36	Release recency — latest release 1 days ago
19.8/27	Release cadence — a release every ~86.1 days
0/10	OpenSSF Scorecard: Signed-Releases — no data

Inputs used

releases_count	45
latest_release_tag	croaring-v2.8.0
releases_from_tags	no
days_since_latest_release	1
mean_days_between_releases	86.1

Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

60Moderate · 17% of overall

Popularity & adoption

54Moderate

How it's scored

36.3/60	Stars — 174 stars
13.6/25	Forks — 44 forks
3.9/15	Watchers — 6 watchers

Inputs used

forks	44
stars	174
watchers	6
growth_state	unverified
growth_factor_pct	100
growth_unverified_reason	no_history

Community health

50Moderate

How it's scored

22.5/22.5	README
22.5/22.5	License — recognized license (Apache-2.0)
0/18	CONTRIBUTING guide
0/13.5	Code of conduct
0/7.2	Issue template
0/6.3	PR template

Inputs used

has_readme	yes
has_license	yes
readme_badges	1
has_contributing	no
has_issue_template	no
has_code_of_conduct	no
readme_badge_services	github.com
has_pull_request_template	no

Ecosystem adoption (downloads)

84Excellent

How it's scored

67.1/80	Monthly downloads — 108,204 downloads/month across crates
0/20	Registry dependents — not reported by this ecosystem

Inputs used

packages	croaring, croaring-sys
dependents	—
ecosystems	crates
total_downloads	3,325,960
monthly_downloads	108,204
unverified_packages_excluded	—

Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

74Good · 23% of overall

Maintainer resilience (bus factor)

60Moderate

How it's scored

25.2/54	Bus factor — 2 contributor(s) cover half of all commits
11.4/22.5	Commit distribution — top contributor authored 49% of commits
13.5/13.5	Contributor breadth — 20 contributors
10/10	OpenSSF Scorecard: Contributors — project has 14 contributing companies or organizations

Inputs used

bus_factor	2
contributors_sampled	20
top_contributor_share	0.493

Issue & PR responsiveness

75Good

How it's scored

41/42	Issue resolution — 98% of issues closed
24/30	PR acceptance — 156/195 decided PRs merged
0/13	Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15	OpenSSF Scorecard: Code-Review — Found 0/16 approved changesets -- score normalized to 0

Inputs used

merged_prs	156
open_issues	1
closed_issues	43
prs_merged_7d	3
prs_decided_7d	3
prs_merged_30d	3
prs_decided_30d	3
issue_closed_ratio	0.977
closed_unmerged_prs	39
first_time_authors_30d	0
first_time_prs_merged_30d	0
first_time_prs_decided_30d	0

Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

68Good

How it's scored

30/30	Ownership backing — organization-owned
0/20	Verified domain
16.5/25	Owner reach — 198 followers of RoaringBitmap
21.9/25	Track record — 22 public repos, account ~10 yr old

Inputs used

followers	198
owner_type	Organization
is_verified	no
owner_login	RoaringBitmap
public_repos	22
account_age_days	3,912

Package maintenance

100Exceptional

How it's scored

25/25	Published & resolvable — 2 package(s) on crates
35/35	Publish recency — latest publish 1 days ago
20/20	Version history — 55 published versions
20/20	Not deprecated — active, not deprecated or yanked

Inputs used

packages	croaring, croaring-sys
ecosystems	crates
any_deprecated	no
min_days_since_publish	1

Engineering Quality

Are baseline engineering and documentation practices in place?

79Good · 19% of overall

Engineering practices

82Excellent

How it's scored

24/24	CI workflows — 1 workflow(s)
24/24	Tests present
16/16	Linter config — croaring/Cargo.toml ([lints]), rustfmt.toml
0/9.6	Pre-commit hooks
0/6.4	.editorconfig
18/20	OpenSSF Scorecard: CI-Tests — 26 out of 27 merged PRs checked by a CI test -- score normalized to 9

Inputs used

has_ci	yes
has_tests	yes
has_editorconfig	no
has_linter_config	yes
has_precommit_config	no

Documentation

75Good

How it's scored

30/30	README
0/25	Documentation directory
15/15	Documentation / homepage site — https://docs.rs/croaring
10/10	Repository description
10/10	Topics — 6 topics
10/10	Wiki

Inputs used

topics	rust, croaring, wrapper, roaring-bitmaps, bitset, bitset-library
has_wiki	yes
homepage	—
docs_site	https://docs.rs/croaring
has_readme	yes
has_docs_dir	no
has_description	yes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

64Moderate · 16% of overall

Security posture

55Moderate

How it's scored

7.5/7.5	Binary-Artifacts — no binaries found in the repo
0/7.5	Branch-Protection — branch protection not enabled on development/release branches
2.2/2.5	CI-Tests — 26 out of 27 merged PRs checked by a CI test -- score normalized to 9
0/2.5	CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5	Code-Review — Found 0/16 approved changesets -- score normalized to 0
2.5/2.5	Contributors — project has 14 contributing companies or organizations
10/10	Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5	Dependency-Update-Tool — update tool detected
5/5	Fuzzing — project is fuzzed
2.5/2.5	License — license file detected
7.5/7.5	Maintained — 14 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
0/5	Packaging — no data
0/5	Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5	SAST — SAST tool is not run on all commits -- score normalized to 0
0/5	Security-Policy — security policy file not detected
0/7.5	Signed-Releases — no data
0/7.5	Token-Permissions — detected GitHub workflow tokens with excessive permissions
6/7.5	Vulnerabilities — 2 existing vulnerabilities detected

Inputs used

source	openssf_scorecard
checks_evaluated	16
scorecard_version	v5.5.0
checks_inconclusive	2
scorecard_aggregate	5.5

Excluded from scoring (no data or not applicable): Packaging, Signed-Releases. Remaining weights renormalized.

Dependency advisories

100Exceptional

How it's scored

35/35	Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25	Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40	No advisories left outstanding — no advisory carries a publication date

Inputs used

source	osv
advisories	3
affected_packages	2
assessed_packages	117
unassessed_packages	6
affected_by_severity	low 1, unknown 1
direct_affected_packages	0

Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 117 resolved dependencies against OSV. 6 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

69Good · 4% of overall

Agent context & guidance

40Weak

How it's scored

0/45	Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15	Machine-readable docs (llms.txt)
40/40	Legible commit history — 71 of 77 human commits state their intent (structured subject or explanatory body)

Inputs used

has_llms_txt	no
llms_txt_url	—
legible_history_share	0.922
agent_instruction_files	—
agent_instruction_max_bytes	—

Verify loop (build / test / typecheck)

80Excellent

How it's scored

18/18	One-command bootstrap — Makefile
22/22	Automated tests
11/11	Lint / format config — croaring/Cargo.toml ([lints]), rustfmt.toml
11/11	Static type checking — C (statically typed)
10/10	Reproducible environment — lockfile
0/10	Demonstrated agent practice — no agent-authored commits among the last 100
8/8	Automated maintenance — 23 of the last 100 commits are automated dependency updates
0/10	OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0

Inputs used

has_nix	no
has_tests	yes
lockfiles	Cargo.lock
has_dockerfile	no
typed_language	yes
bootstrap_files	Makefile
has_devcontainer	no
has_linter_config	yes
typecheck_configs	—
agent_commit_share	0
toolchain_manifests	Cargo.toml, croaring-sys/Cargo.toml, croaring/Cargo.toml, fuzz/Cargo.toml
dependency_bot_commit_share	0.23

Code legibility for models

96Exceptional

How it's scored

45/45	Type-checkable code — C (statically typed)
51.3/55	Manageable file sizes — 3/45 source files over 60KB

Inputs used

primary_language	C
largest_source_bytes	880,780
source_files_sampled	45
oversized_source_files	3

Key facts

174GitHub stars

20contributors

43commits, last 12 months

1days since last push

45releases

2bus factor

1open issues

crates.iopackage ecosystems

Data collection warnings

Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
deps.dev does not index crates:croaring@2.8.0; advisories assessed against the repository dependency graph instead

More detail

Star and fork history 0 ★ / 44 ⇿

0Stars

44Forks

38Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

Major 2Minor 7Patch 22

Each point covers 9 days.

OpenSSF Scorecard 5.5 / 10

5.5aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-09-21 07:38 UTC

10	Binary-Artifacts	no binaries found in the repo
0	Branch-Protection	branch protection not enabled on development/release branches
9	CI-Tests	26 out of 27 merged PRs checked by a CI test -- score normalized to 9
0	CII-Best-Practices	no effort to earn an OpenSSF best practices badge detected
0	Code-Review	Found 0/16 approved changesets -- score normalized to 0
10	Contributors	project has 14 contributing companies or organizations
10	Dangerous-Workflow	no dangerous workflow patterns detected
10	Dependency-Update-Tool	update tool detected
10	Fuzzing	project is fuzzed
10	License	license file detected
10	Maintained	14 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
n/a	Packaging	packaging workflow not detected
0	Pinned-Dependencies	dependency not pinned by hash detected -- score normalized to 0
0	SAST	SAST tool is not run on all commits -- score normalized to 0
0	Security-Policy	security policy file not detected
n/a	Signed-Releases	no releases found
0	Token-Permissions	detected GitHub workflow tokens with excessive permissions
8	Vulnerabilities	2 existing vulnerabilities detected

Direct dependencies 2

Registry	Package	Version constraint	Manifest
crates.io	allocator-api2	`0.4.0`	croaring/Cargo.toml
crates.io	ffi	`5.2.2`	croaring/Cargo.toml

All dependencies 123

Full resolved dependency set from the GitHub dependency graph: 2 direct and 121 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

Registry	Package	Version	Relation
crates.io	allocator-api2	`—`	direct
crates.io	allocator-api2	`0.4.0`	direct
crates.io	aho-corasick	`1.1.3`	indirect
crates.io	alloca	`0.4.0`	indirect
crates.io	anes	`0.1.6`	indirect
crates.io	anstyle	`1.0.13`	indirect
crates.io	arbitrary	`1.4.2`	indirect
crates.io	autocfg	`1.5.0`	indirect
crates.io	bit-set	`0.8.0`	indirect
crates.io	bit-vec	`0.8.0`	indirect
crates.io	bitflags	`2.11.0`	indirect
crates.io	bitvec	`1.1.1`	indirect
crates.io	bumpalo	`3.19.0`	indirect
crates.io	bytemuck	`1.23.2`	indirect
crates.io	byteorder	`1.5.0`	indirect
crates.io	cast	`0.3.0`	indirect
crates.io	cc	`—`	indirect
crates.io	cc	`1.2.65`	indirect
crates.io	cc	`1.4.0`	indirect
crates.io	cfg-if	`1.0.3`	indirect
crates.io	cfg-if	`1.0.4`	indirect
crates.io	ciborium	`0.2.2`	indirect
crates.io	ciborium-io	`0.2.2`	indirect
crates.io	ciborium-ll	`0.2.2`	indirect
crates.io	clap	`4.5.48`	indirect
crates.io	clap_builder	`4.5.48`	indirect
crates.io	clap_lex	`0.7.5`	indirect
crates.io	criterion	`—`	indirect
crates.io	criterion	`0.8.2`	indirect
crates.io	criterion-plot	`0.8.2`	indirect
crates.io	croaring-sys	`—`	indirect
crates.io	crossbeam-deque	`0.8.6`	indirect
crates.io	crossbeam-epoch	`0.9.18`	indirect
crates.io	crossbeam-utils	`0.8.21`	indirect
crates.io	crunchy	`0.2.4`	indirect
crates.io	derive_arbitrary	`1.4.2`	indirect
crates.io	either	`1.15.0`	indirect
crates.io	errno	`0.3.14`	indirect
crates.io	fastrand	`2.3.0`	indirect
crates.io	find-msvc-tools	`0.1.9`	indirect
crates.io	fnv	`1.0.7`	indirect
crates.io	funty	`2.0.0`	indirect
crates.io	getrandom	`0.3.3`	indirect
crates.io	getrandom	`0.3.4`	indirect
crates.io	half	`2.6.0`	indirect
crates.io	itertools	`0.13.0`	indirect
crates.io	itoa	`1.0.15`	indirect
crates.io	jobserver	`0.1.34`	indirect
crates.io	js-sys	`0.3.81`	indirect
crates.io	libc	`0.2.176`	indirect
crates.io	libc	`0.2.186`	indirect
crates.io	libfuzzer-sys	`0.4.13`	indirect
crates.io	linux-raw-sys	`0.11.0`	indirect
crates.io	log	`0.4.28`	indirect
crates.io	memchr	`2.7.6`	indirect
crates.io	num-traits	`0.2.19`	indirect
crates.io	once_cell	`1.21.3`	indirect
crates.io	oorandom	`11.1.5`	indirect
crates.io	page_size	`0.6.0`	indirect
crates.io	plotters	`0.3.7`	indirect
crates.io	plotters-backend	`0.3.7`	indirect
crates.io	plotters-svg	`0.3.7`	indirect
crates.io	ppv-lite86	`0.2.21`	indirect
crates.io	proc-macro2	`1.0.101`	indirect
crates.io	proc-macro2	`1.0.106`	indirect
crates.io	proptest	`—`	indirect
crates.io	proptest	`1.11.0`	indirect
crates.io	quick-error	`1.2.3`	indirect
crates.io	quote	`1.0.41`	indirect
crates.io	quote	`1.0.46`	indirect
crates.io	r-efi	`5.3.0`	indirect
crates.io	radium	`0.7.0`	indirect
crates.io	rand	`0.9.2`	indirect
crates.io	rand_chacha	`0.9.0`	indirect
crates.io	rand_core	`0.9.3`	indirect
crates.io	rand_xorshift	`0.4.0`	indirect
crates.io	rayon	`1.11.0`	indirect
crates.io	rayon-core	`1.13.0`	indirect
crates.io	regex	`1.11.3`	indirect
crates.io	regex-automata	`0.4.11`	indirect
crates.io	regex-syntax	`0.8.6`	indirect
crates.io	roaring	`—`	indirect
crates.io	roaring	`0.11.4`	indirect
crates.io	rustix	`1.1.2`	indirect
crates.io	rustversion	`1.0.22`	indirect
crates.io	rusty-fork	`0.3.0`	indirect
crates.io	ryu	`1.0.20`	indirect
crates.io	same-file	`1.0.6`	indirect
crates.io	serde	`1.0.228`	indirect
crates.io	serde_core	`1.0.228`	indirect
crates.io	serde_derive	`1.0.228`	indirect
crates.io	serde_json	`1.0.145`	indirect
crates.io	shlex	`2.0.1`	indirect
crates.io	syn	`2.0.106`	indirect
crates.io	syn	`2.0.118`	indirect
crates.io	tap	`1.0.1`	indirect
crates.io	tempfile	`3.23.0`	indirect
crates.io	tinytemplate	`1.2.1`	indirect
crates.io	unarray	`0.1.4`	indirect
crates.io	unicode-ident	`1.0.19`	indirect
crates.io	unicode-ident	`1.0.24`	indirect
crates.io	wait-timeout	`0.2.1`	indirect
crates.io	walkdir	`2.5.0`	indirect
crates.io	wasi	`0.14.7+wasi-0.2.4`	indirect
crates.io	wasip2	`1.0.1+wasi-0.2.4`	indirect
crates.io	wasip2	`1.0.4+wasi-0.2.12`	indirect
crates.io	wasm-bindgen	`0.2.104`	indirect
crates.io	wasm-bindgen-backend	`0.2.104`	indirect
crates.io	wasm-bindgen-macro	`0.2.104`	indirect
crates.io	wasm-bindgen-macro-support	`0.2.104`	indirect
crates.io	wasm-bindgen-shared	`0.2.104`	indirect
crates.io	web-sys	`0.3.81`	indirect
crates.io	winapi	`0.3.9`	indirect
crates.io	winapi-i686-pc-windows-gnu	`0.4.0`	indirect
crates.io	winapi-util	`0.1.11`	indirect
crates.io	winapi-x86_64-pc-windows-gnu	`0.4.0`	indirect
crates.io	windows-link	`0.2.0`	indirect
crates.io	windows-sys	`0.61.1`	indirect
crates.io	wit-bindgen	`0.46.0`	indirect
crates.io	wit-bindgen	`0.57.1`	indirect
crates.io	wyz	`0.5.1`	indirect
crates.io	zerocopy	`0.8.27`	indirect
crates.io	zerocopy-derive	`0.8.27`	indirect

Dependency advisories 2

This repository publishes no package the index resolves, so its own dependency graph was assessed — 117 packages, which also include development and test pins that never ship: 2 carry known advisories, of which 0 are direct. 6 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

Package	Version	Relation	Severity	Advisories	Fixed in
rand	`0.9.2`	indirect	low	2	`0.10.1`
crossbeam-epoch	`0.9.18`	indirect	unknown	1	`0.9.20`

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

Feedback

Spotted something off in this report, or have thoughts to share? Wrong measurements, missed tooling, ideas, questions — anything is welcome. Every message is read and gets a response.

Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.10.0, schema v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — crates.io.

Software health index

Score profile

Ownership

Package ecosystems

Metrics by category

Key facts

Data collection warnings

More detail

Feedback

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