Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-14 22:27 UTC

apache / datasketches-rust

A software library of stochastic streaming algorithms, a.k.a. sketches.

RustApache-2.0★ 113 stars⑂ 33 forkssince Dec 2025View on GitHub ↗

KindLibraryCommand-line toolhow this is determined

apache/datasketches-rust holds a health index of 91 out of 100, placing it in the Excellent band. It scores highest on Vitality (86/100) and lowest on Engineering Quality (70/100). It was last updated 1 day ago. A single contributor accounts 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 77 is calibrated to 91 on the published index scale (record calibration 2026-08-02).

Ownership

The Apache Software FoundationOrganization

23,796 followers3,153 public repossince Jan 2009

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	x	0.0.1	33	1	620 days ago	—
crates.io	datasketches	0.3.0	574,529	11	1 day ago	hyperloglog probabilistic sketch algorithms data-structures

Metrics by category

Vitality

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

86Excellent · 21% of overall

Development activity

84Excellent

How it's scored

36/36	Push recency — last push 1 days ago
20.1/36	Commit cadence — 29/52 weeks with commits
18/18	Commit volume — 141 commits in the last year
10/10	OpenSSF Scorecard: Maintained — 30 commit(s) and 22 issue activity found in the last 90 days -- score normalized to 10

Inputs used

commits_last_year	141
human_commit_share	1
days_since_last_push	1
active_weeks_last_year	29

Release discipline

88Excellent

How it's scored

16.2/27	Ships releases — 7 version tags (no GitHub releases)
36/36	Release recency — latest release 1 days ago
27/27	Release cadence — a release every ~37.4 days
0/10	OpenSSF Scorecard: Signed-Releases — no data

Inputs used

releases_count	7
latest_release_tag	0.4.0-rc.1
releases_from_tags	yes
days_since_latest_release	1
mean_days_between_releases	37.4

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?

73Good · 17% of overall

Popularity & adoption

49Weak

How it's scored

33.2/60	Stars — 113 stars
12.5/25	Forks — 33 forks
3.3/15	Watchers — 5 watchers

Inputs used

forks	33
stars	113
watchers	5
growth_state	unverified
growth_factor_pct	100
growth_unverified_reason	no_history

Community health

85Excellent

How it's scored

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

Inputs used

has_readme	yes
has_license	yes
readme_badges	0
has_contributing	yes
has_issue_template	no
has_code_of_conduct	yes
readme_badge_services	—
has_pull_request_template	no

Ecosystem adoption (downloads)

96Exceptional

How it's scored

76.8/80	Monthly downloads — 574,529 downloads/month across crates
0/20	Registry dependents — not reported by this ecosystem

Inputs used

packages	datasketches
dependents	—
ecosystems	crates
total_downloads	1,878,902
monthly_downloads	574,529
unverified_packages_excluded	x

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?

80Excellent · 23% of overall

Maintainer resilience (bus factor)

43Weak

How it's scored

9/54	Bus factor — 1 contributor(s) cover half of all commits
10.2/22.5	Commit distribution — top contributor authored 55% of commits
13.5/13.5	Contributor breadth — 18 contributors
10/10	OpenSSF Scorecard: Contributors — project has 16 contributing companies or organizations

Inputs used

bus_factor	1
contributors_sampled	18
top_contributor_share	0.546

Issue & PR responsiveness

87Excellent

How it's scored

35.4/42	Issue resolution — 84% of issues closed
28.1/30	PR acceptance — 133/142 decided PRs merged
13/13	Newcomer PR acceptance — 7/7 first-time contributors' PRs merged in 30d
10.5/15	OpenSSF Scorecard: Code-Review — Found 22/30 approved changesets -- score normalized to 7

Inputs used

merged_prs	133
open_issues	8
closed_issues	43
prs_merged_7d	10
prs_decided_7d	11
prs_merged_30d	39
prs_decided_30d	41
issue_closed_ratio	0.843
closed_unmerged_prs	9
first_time_authors_30d	4
first_time_prs_merged_30d	7
first_time_prs_decided_30d	7

Ownership & stewardship

100Exceptional

How it's scored

30/30	Ownership backing — organization-owned
0/20	Verified domain — verified-domain status not read for this organization
25/25	Owner reach — 23,796 followers of apache
25/25	Track record — 3,153 public repos, account ~17 yr old

Inputs used

followers	23,796
owner_type	Organization
is_verified	—
owner_login	apache
public_repos	3,153
account_age_days	6,418

Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

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 — 11 published versions
20/20	Not deprecated — active, not deprecated or yanked

Inputs used

packages	x, datasketches
ecosystems	crates
any_deprecated	no
min_days_since_publish	1

Engineering Quality

Are baseline engineering and documentation practices in place?

70Good · 19% of overall

Engineering practices

74Good

How it's scored

24/24	CI workflows — 1 workflow(s)
24/24	Tests present
0/16	Linter config
0/9.6	Pre-commit hooks
6.4/6.4	.editorconfig
20/20	OpenSSF Scorecard: CI-Tests — 30 out of 30 merged PRs checked by a CI test -- score normalized to 10

Inputs used

has_ci	yes
has_tests	yes
has_editorconfig	yes
has_linter_config	no
has_precommit_config	no

Documentation

65Good

How it's scored

30/30	README
0/25	Documentation directory
15/15	Documentation / homepage site — https://datasketches.apache.org
10/10	Repository description
10/10	Topics — 3 topics
0/10	Wiki

Inputs used

topics	algorithms, datasketches, rust
has_wiki	no
homepage	https://datasketches.apache.org
docs_site	https://datasketches.apache.org
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?

71Good · 16% of overall

Security posture

64Moderate

How it's scored

7.5/7.5	Binary-Artifacts — no binaries found in the repo
0/7.5	Branch-Protection — no data
2.5/2.5	CI-Tests — 30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0/2.5	CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
5.2/7.5	Code-Review — Found 22/30 approved changesets -- score normalized to 7
2.5/2.5	Contributors — project has 16 contributing companies or organizations
0/10	Dangerous-Workflow — no data
0/7.5	Dependency-Update-Tool — no update tool detected
0/5	Fuzzing — project is not fuzzed
2.5/2.5	License — license file detected
7.5/7.5	Maintained — 30 commit(s) and 22 issue activity found in the last 90 days -- score normalized to 10
0/5	Packaging — no data
0/5	Pinned-Dependencies — no data
0/5	SAST — SAST tool is not run on all commits -- score normalized to 0
5/5	Security-Policy — security policy file detected
0/7.5	Signed-Releases — no data
0/7.5	Token-Permissions — no data
7.5/7.5	Vulnerabilities — 0 existing vulnerabilities detected

Inputs used

source	openssf_scorecard
checks_evaluated	12
scorecard_version	v5.5.0
checks_inconclusive	6
scorecard_aggregate	6.4

Excluded from scoring (no data or not applicable): Branch-Protection, Dangerous-Workflow, Packaging, Pinned-Dependencies, Signed-Releases, Token-Permissions. 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	0
affected_packages	0
assessed_packages	104
unassessed_packages	0
affected_by_severity	none
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 104 resolved dependencies against OSV. 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.

81Excellent · 4% of overall

Agent context & guidance

85Excellent

How it's scored

45/45	Agent instructions — AGENTS.md
0/15	Machine-readable docs (llms.txt)
40/40	Legible commit history — 100 of 100 human commits state their intent (structured subject or explanatory body)

Inputs used

has_llms_txt	no
llms_txt_url	—
legible_history_share	1
agent_instruction_files	AGENTS.md
agent_instruction_max_bytes	542

Verify loop (build / test / typecheck)

71Good

How it's scored

12.6/18	One-command bootstrap — Cargo.toml, datasketches/Cargo.toml, xtask/Cargo.toml (toolchain convention, no task runner)
22/22	Automated tests
0/11	Lint / format config
11/11	Static type checking — Rust (statically typed)
10/10	Reproducible environment — lockfile
8/10	Demonstrated agent practice — 4 of the last 100 commits agent-authored or agent-credited
0/8	Automated maintenance — no automated dependency updates observed
0/10	OpenSSF Scorecard: Pinned-Dependencies — no data

Inputs used

has_nix	no
has_tests	yes
lockfiles	Cargo.lock
has_dockerfile	no
typed_language	yes
bootstrap_files	—
has_devcontainer	no
has_linter_config	no
typecheck_configs	—
agent_commit_share	0.04
toolchain_manifests	Cargo.toml, datasketches/Cargo.toml, xtask/Cargo.toml
dependency_bot_commit_share	0

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

Code legibility for models

99Exceptional

How it's scored

45/45	Type-checkable code — Rust (statically typed)
53.7/55	Manageable file sizes — 3/125 source files over 60KB

Inputs used

primary_language	Rust
largest_source_bytes	780,208
source_files_sampled	125
oversized_source_files	3

Key facts

113GitHub stars

18contributors

141commits, last 12 months

1days since last push

7releases

1bus factor

8open issues

crates.iopackage ecosystems

Data collection warnings

Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 33 ⇿

0Stars

33Forks

6Releases

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 0Minor 2Patch 0

OpenSSF Scorecard 6.4 / 10

6.4aggregate

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 · 2026-08-14 22:26 UTC

10	Binary-Artifacts	no binaries found in the repo
n/a	Branch-Protection	internal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md
10	CI-Tests	30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0	CII-Best-Practices	no effort to earn an OpenSSF best practices badge detected
7	Code-Review	Found 22/30 approved changesets -- score normalized to 7
10	Contributors	project has 16 contributing companies or organizations
n/a	Dangerous-Workflow	no workflows found
0	Dependency-Update-Tool	no update tool detected
0	Fuzzing	project is not fuzzed
10	License	license file detected
10	Maintained	30 commit(s) and 22 issue activity found in the last 90 days -- score normalized to 10
n/a	Packaging	packaging workflow not detected
n/a	Pinned-Dependencies	no dependencies found
0	SAST	SAST tool is not run on all commits -- score normalized to 0
10	Security-Policy	security policy file detected
n/a	Signed-Releases	no releases found
n/a	Token-Permissions	No tokens found
10	Vulnerabilities	0 existing vulnerabilities detected

Direct dependencies 6

Registry	Package	Version constraint	Manifest
crates.io	clap	`—`	xtask/Cargo.toml
crates.io	cargo_metadata	`—`	xtask/Cargo.toml
crates.io	flate2	`—`	xtask/Cargo.toml
crates.io	tar	`—`	xtask/Cargo.toml
crates.io	ureq	`—`	xtask/Cargo.toml
crates.io	which	`—`	xtask/Cargo.toml

All dependencies 104

Full resolved dependency set from the GitHub dependency graph: 6 direct and 98 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

Registry	Package	Version	Relation
crates.io	cargo_metadata	`0.23.1`	direct
crates.io	clap	`4.6.5`	direct
crates.io	flate2	`1.1.9`	direct
crates.io	tar	`0.4.46`	direct
crates.io	ureq	`3.3.0`	direct
crates.io	which	`8.0.5`	direct
crates.io	adler2	`2.0.1`	indirect
crates.io	aho-corasick	`1.1.4`	indirect
crates.io	anstream	`1.0.0`	indirect
crates.io	anstyle	`1.0.14`	indirect
crates.io	anstyle-parse	`1.0.0`	indirect
crates.io	anstyle-query	`1.1.5`	indirect
crates.io	anstyle-wincon	`3.0.11`	indirect
crates.io	autocfg	`1.5.1`	indirect
crates.io	base64	`0.22.1`	indirect
crates.io	bitflags	`2.13.1`	indirect
crates.io	byteorder	`1.5.0`	indirect
crates.io	bytes	`1.12.1`	indirect
crates.io	camino	`1.2.5`	indirect
crates.io	cargo-platform	`0.3.1`	indirect
crates.io	cc	`1.4.0`	indirect
crates.io	cfg-if	`1.0.4`	indirect
crates.io	clap_builder	`4.6.5`	indirect
crates.io	clap_derive	`4.6.4`	indirect
crates.io	clap_lex	`1.1.0`	indirect
crates.io	colorchoice	`1.0.5`	indirect
crates.io	console	`0.16.4`	indirect
crates.io	encode_unicode	`1.0.0`	indirect
crates.io	errno	`0.3.14`	indirect
crates.io	fastrand	`2.5.0`	indirect
crates.io	filetime	`0.2.29`	indirect
crates.io	find-msvc-tools	`0.1.9`	indirect
crates.io	getrandom	`0.2.17`	indirect
crates.io	getrandom	`0.4.3`	indirect
crates.io	googletest	`0.14.3`	indirect
crates.io	googletest_macro	`0.14.3`	indirect
crates.io	heck	`0.5.0`	indirect
crates.io	http	`1.5.0`	indirect
crates.io	httparse	`1.10.1`	indirect
crates.io	insta	`1.48.0`	indirect
crates.io	is_terminal_polyfill	`1.70.2`	indirect
crates.io	itoa	`1.0.18`	indirect
crates.io	libc	`0.2.189`	indirect
crates.io	linux-raw-sys	`0.12.1`	indirect
crates.io	log	`0.4.33`	indirect
crates.io	memchr	`2.8.3`	indirect
crates.io	miniz_oxide	`0.8.9`	indirect
crates.io	num-traits	`0.2.19`	indirect
crates.io	once_cell	`1.21.4`	indirect
crates.io	once_cell_polyfill	`1.70.2`	indirect
crates.io	percent-encoding	`2.3.2`	indirect
crates.io	proc-macro2	`1.0.107`	indirect
crates.io	quote	`1.0.47`	indirect
crates.io	r-efi	`6.0.0`	indirect
crates.io	regex	`1.13.1`	indirect
crates.io	regex-automata	`0.4.16`	indirect
crates.io	regex-syntax	`0.8.11`	indirect
crates.io	ring	`0.17.14`	indirect
crates.io	rustix	`1.1.4`	indirect
crates.io	rustls	`0.23.43`	indirect
crates.io	rustls-pki-types	`1.15.1`	indirect
crates.io	rustls-webpki	`0.103.13`	indirect
crates.io	rustversion	`1.0.23`	indirect
crates.io	semver	`1.0.28`	indirect
crates.io	serde	`1.0.229`	indirect
crates.io	serde_core	`1.0.229`	indirect
crates.io	serde_derive	`1.0.229`	indirect
crates.io	serde_json	`1.0.151`	indirect
crates.io	shlex	`2.0.1`	indirect
crates.io	simd-adler32	`0.3.10`	indirect
crates.io	similar	`2.7.0`	indirect
crates.io	socks	`0.3.4`	indirect
crates.io	strsim	`0.11.1`	indirect
crates.io	subtle	`2.6.1`	indirect
crates.io	syn	`2.0.119`	indirect
crates.io	syn	`3.0.3`	indirect
crates.io	tempfile	`3.27.0`	indirect
crates.io	thiserror	`2.0.19`	indirect
crates.io	thiserror-impl	`2.0.19`	indirect
crates.io	unicode-ident	`1.0.24`	indirect
crates.io	untrusted	`0.9.0`	indirect
crates.io	ureq-proto	`0.6.0`	indirect
crates.io	utf8-zero	`0.8.1`	indirect
crates.io	utf8parse	`0.2.2`	indirect
crates.io	wasi	`0.11.1+wasi-snapshot-preview1`	indirect
crates.io	webpki-roots	`1.0.9`	indirect
crates.io	winapi	`0.3.9`	indirect
crates.io	winapi-i686-pc-windows-gnu	`0.4.0`	indirect
crates.io	winapi-x86_64-pc-windows-gnu	`0.4.0`	indirect
crates.io	windows-link	`0.2.1`	indirect
crates.io	windows-sys	`0.52.0`	indirect
crates.io	windows-sys	`0.61.2`	indirect
crates.io	windows-targets	`0.52.6`	indirect
crates.io	windows_aarch64_gnullvm	`0.52.6`	indirect
crates.io	windows_aarch64_msvc	`0.52.6`	indirect
crates.io	windows_i686_gnu	`0.52.6`	indirect
crates.io	windows_i686_gnullvm	`0.52.6`	indirect
crates.io	windows_i686_msvc	`0.52.6`	indirect
crates.io	windows_x86_64_gnu	`0.52.6`	indirect
crates.io	windows_x86_64_gnullvm	`0.52.6`	indirect
crates.io	windows_x86_64_msvc	`0.52.6`	indirect
crates.io	zeroize	`1.9.0`	indirect
crates.io	zlib-rs	`0.6.6`	indirect
crates.io	zmij	`1.0.23`	indirect

Dependency advisories 0

This repository publishes no package the index resolves, so its own dependency graph was assessed — 104 packages, which also include development and test pins that never ship: 0 carry known advisories, of which 0 are direct.

No known advisories affect the assessed dependencies.

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 v0.31.0 — 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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