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Gathering detailed insights and metrics for @edit-distance/myers-1986

@edit-distance/myers-1986 - 1.1.0 | npmpackage.info

@edit-distance/myers-1986

🧮 Reasonably efficient implementation of Eugene W. Myers's exact longest common subsequence and minimum edit-distance algorithm for JavaScript

1.1.0

AGPL-3.0

JavaScript

766.11 kB

2.5

Installations

npm install @edit-distance/myers-1986

Developer Guide

BETA

Typescript

No

Module System

ESM

Score

67.3

Supply Chain

95.1

Quality

77.9

Maintenance

100

Vulnerability

80.6

License

Pull Requests

Open

10

Total

336

Closed

10

Merged

316

Issues

Open

5

Total

20

Closed

15

Releases

v1.1.0

Updated on Jul 04, 2021

v1.0.2

Updated on Jul 01, 2021

v1.0.1

Updated on Jul 01, 2021

v1.0.0

Updated on Jun 29, 2021

v0.0.1

Updated on Jun 28, 2021

View All 5 releases

Languages

JavaScript

Shell

JavaScript (96.72%)

Shell (3.28%)

Developer

edit-distance

Download Statistics

Total Downloads

Last Day

Last Week

Last Month

Last Year

GitHub Statistics

AGPL-3.0 License

2 Stars

425 Commits

1 Forks

1 Watchers

17 Branches

3 Contributors

Updated on Jun 14, 2025

Maintainers

View All 3 Contributors

Package Meta Information

Latest Version

1.1.0

Package Id

@edit-distance/myers-1986@1.1.0

Unpacked Size

766.11 kB

Size

258.87 kB

File Count

Total Downloads

Cumulative downloads

Total Downloads

NaN

Last Day

NaN

Compared to previous day

Last Week

NaN

Compared to previous week

Last Month

NaN

Compared to previous month

Last Year

NaN

Compared to previous year

Weekly Downloads

Monthly Downloads

Yearly Downloads

:abacus: @edit-distance/myers-1986

Reasonably efficient implementation of Eugene W. Myers's exact longest common subsequence and minimum edit-distance algorithm for JavaScript. See docs.

:building_construction: Caveat emptor! This is work in progress. Code may be working. Documentation may be present. Coherence may be. Maybe.

:warning: Only signed 32-bit integers are supported for MAX, xi, xj, yi, yj. This is also true for the values xj - xi and yj - yi but is not enforced. You should be fine if the elements of each pair have the same sign. This means you cannot diff things with more than 2,147,483,647 parts (array elements, string characters, text words or lines).

1// Example 1: compute Edit Distance.
2
3import {makeScan, twoWay} from '@edit-distance/myers-1986';
4
5const scan = makeScan(twoWay);
6
7const ed = (x, y) => {
8	const eq = (xi, yi) => x[xi] === y[yi];
9	const xi = 0;
10	const xj = x.length;
11	const yi = 0;
12	const yj = y.length;
13	const MAX = xj - xi + (yj - yi);
14	return scan(MAX, eq, xi, xj, yi, yj);
15};
16
17ed('BANANA', 'ATANA'); // 3
18
19// Example 2: compute LCS.
20
21import {diff} from '@edit-distance/myers-1986';
22
23const rectangles = (x, y) => {
24	const eq = (xi, yi) => x[xi] === y[yi];
25	const xi = 0;
26	const xj = x.length;
27	const yi = 0;
28	const yj = y.length;
29	const MAX = xj - xi + (yj - yi);
30	return diff(MAX, eq, xi, xj, yi, yj);
31};
32
33const lcs = (x, y) => {
34	let result = x.slice(0, 0);
35	let xp = 0;
36	for (const [x0, x1] of rectangles(x, y)) {
37		result = result.concat(x.slice(xp, x0));
38		xp = x1;
39	}
40
41	return result.concat(x.slice(xp, x.length));
42};
43
44lcs('BANANA', 'ATANA'); // AANA

:bicyclist: Benchmark

input	fast-myers-diff v3.0.1	modern.js v0.0.1	module.js v0.0.1	cjs v0.0.1
N+M=220 N=100 M=120 LCS=100 DEL=0 INS=20	77,170 ops/sec	99,952 ops/sec	97,806 ops/sec	100,333 ops/sec
N+M=220 N=120 M=100 LCS=100 DEL=20 INS=0	68,575 ops/sec	90,582 ops/sec	89,178 ops/sec	90,030 ops/sec
N+M=220 N=110 M=110 LCS=100 DEL=10 INS=10	63,494 ops/sec	83,439 ops/sec	81,201 ops/sec	82,661 ops/sec
N+M=224 N=14 M=210 LCS=10 DEL=4 INS=200	7,112 ops/sec	10,346 ops/sec	10,406 ops/sec	10,898 ops/sec
N+M=20020 N=10000 M=10020 LCS=10000 DEL=0 INS=20	3,282 ops/sec	4,313 ops/sec	4,174 ops/sec	4,415 ops/sec
N+M=20020 N=10020 M=10000 LCS=10000 DEL=20 INS=0	3,317 ops/sec	4,040 ops/sec	4,035 ops/sec	4,947 ops/sec
N+M=20020 N=10010 M=10010 LCS=10000 DEL=10 INS=10	2,414 ops/sec	2,939 ops/sec	2,843 ops/sec	3,009 ops/sec
N+M=220 N=110 M=110 LCS=10 DEL=100 INS=100	1,607 ops/sec	2,737 ops/sec	2,720 ops/sec	2,887 ops/sec
N+M=20200 N=10000 M=10200 LCS=10000 DEL=0 INS=200	871 ops/sec	1,258 ops/sec	1,254 ops/sec	1,293 ops/sec
N+M=20200 N=10200 M=10000 LCS=10000 DEL=200 INS=0	844 ops/sec	1,240 ops/sec	1,258 ops/sec	1,309 ops/sec
N+M=20200 N=10100 M=10100 LCS=10000 DEL=100 INS=100	703 ops/sec	978 ops/sec	976 ops/sec	978 ops/sec
N+M=2020 N=1010 M=1010 LCS=10 DEL=1000 INS=1000	19.10 ops/sec	36.35 ops/sec	36.45 ops/sec	38.16 ops/sec

No vulnerabilities found.

10

Dangerous-Workflow

Determines if the project's GitHub Action workflows avoid dangerous patterns.

10

Binary-Artifacts

Determines if the project has generated executable (binary) artifacts in the source repository.

10

License

Determines if the project has defined a license.

0

Code-Review

Determines if the project requires human code review before pull requests (aka merge requests) are merged.

0

Maintained

Determines if the project is "actively maintained".

0

CII-Best-Practices

Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.

0

Token-Permissions

Determines if the project's workflows follow the principle of least privilege.

0

Security-Policy

Determines if the project has published a security policy.

0

Pinned-Dependencies

Determines if the project has declared and pinned the dependencies of its build process.

Reason

dependency not pinned by hash detected -- score normalized to 0

Details

Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/ci.yml:19: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci.yml:28: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci.yml:43: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/ci.yml:46: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci.yml:52: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci:cover.yml:13: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:cover.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/ci:cover.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:cover.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/ci:cover.yml:25: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:cover.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci:lint-config.yml:13: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:lint-config.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/ci:lint-config.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:lint-config.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/ci:lint.yml:13: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:lint.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/ci:lint.yml:16: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/ci:lint.yml/main?enable=pin
Warn: GitHub-owned GitHubAction not pinned by hash: .github/workflows/gh-pages.yml:11: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/gh-pages.yml/main?enable=pin
Warn: third-party GitHubAction not pinned by hash: .github/workflows/gh-pages.yml:20: update your workflow using https://app.stepsecurity.io/secureworkflow/edit-distance/myers-1986/gh-pages.yml/main?enable=pin
Warn: npmCommand not pinned by hash: .github/workflows/gh-pages.yml:15
Info: 0 out of 8 GitHub-owned GitHubAction dependencies pinned
Info: 0 out of 7 third-party GitHubAction dependencies pinned
Info: 0 out of 1 npmCommand dependencies pinned

0

Fuzzing

Determines if the project uses fuzzing.

0

Branch-Protection

Determines if the default and release branches are protected with GitHub's branch protection settings.

0

SAST

Determines if the project uses static code analysis.

0

Vulnerabilities

Determines if the project has open, known unfixed vulnerabilities.

Score

2.5

/10

Last Scanned on 2025-07-14

The Open Source Security Foundation is a cross-industry collaboration to improve the security of open source software (OSS). The Scorecard provides security health metrics for open source projects.

Learn More

@edit-distance/myers-1986

Installations

Developer Guide

No

ESM

Score

Pull Requests

10

336

10

316

Issues

5

20

15

Releases

Languages

Developer

Download Statistics

GitHub Statistics

Maintainers

Package Meta Information

Total Downloads

NaN

Weekly Downloads

Monthly Downloads

Yearly Downloads

Dependencies

Dev Dependencies

:abacus: @edit-distance/myers-1986

:bicyclist: Benchmark

10

10

10

0

0

0

0

0

0

0

0

0

0

2.5

/10