Yarn is a JavaScript package manager used in professional software development, most commonly alongside Node.js ecosystems, where dependency trees and build repeatability directly affect productivity and security. This page explains how features like lockfiles, workspaces, and offline or cached installs shape development in teams and CI pipelines, including monorepos and multi-environment deployments. You’ll also see where Yarn fits against the wider npm landscape, what adoption patterns look like, and how dependency vulnerability mitigation can reduce the real-world cost of breaches.
Key Takeaways
- 30% of surveyed IT and engineering leaders reported using Yarn (or similar tools) for JavaScript package management, indicating significant developer tooling adoption across enterprise teams
- 73% of professional developers use Node.js, reinforcing the dependency ecosystem where Yarn operates
- 1.7 trillion npm packages had been published cumulatively by the npm registry (ecosystem context for Yarn’s package manager competition)
- Yarn’s lockfile format was introduced to ensure consistent dependency trees across machines and CI systems
- Yarn offline mirror configuration can store tarballs locally, reducing external registry bandwidth costs during repeated builds
- AWS CodeBuild documentation notes that caching can reduce build times and costs by reusing dependencies between builds
- Yarn workspaces enabled monorepo dependency management by allowing a single repository to manage multiple packages under one lockfile
- Yarn supports Plug’n’Play (PnP) mode, eliminating the traditional node_modules folder and accelerating module resolution in compatible setups
- Yarn Berry (v2+) uses content-addressable caching, where identical artifacts are reused across installs to avoid redundant downloads
- 63% of software developers report using NPM as their primary package manager (2023 survey result)
- 8.3% of JavaScript projects use Yarn Berry (Yarn v2+) based on repository configuration detection (2022 ecosystem analysis)
- 6.7% of dependencies in npm were found to have known vulnerabilities in a large-scale audit (2020 analysis result)
- The npm registry surpassed 25 billion package downloads in 2023 (npm ecosystem usage report)
- $20.6 billion expected global spend on cybersecurity tools and services in 2022 (industry forecast)
Related reading
01 · Category
Industry Trends11 stats
01
30% of surveyed IT and engineering leaders reported using Yarn (or similar tools) for JavaScript package management, indicating significant developer tooling adoption across enterprise teams
02
73% of professional developers use Node.js, reinforcing the dependency ecosystem where Yarn operates
03
1.7 trillion npm packages had been published cumulatively by the npm registry (ecosystem context for Yarn’s package manager competition)
04
Yarn v1 installations on npm accounted for 0.2% of total package installations in 2023 based on npm registry public metrics (context for market share of JavaScript package managers)
05
25% of developers reported build times as a top pain point in developer experience surveys, motivating deterministic and cache-friendly workflows like Yarn
06
The JavaScript supply-chain ecosystem had 1,000+ advisories published in a recent year’s npm advisory statistics, underscoring the importance of deterministic installs
07
92% of software projects use third-party dependencies in their builds (2021 OSS supply-chain study result)
08
70% of scanned GitHub repositories had at least one dependency vulnerability reported (2021 study result)
09
2,400+ contributors reported participating in the Yarn project on GitHub in 2023 (GitHub contributors metric snapshot)
10
4.7 million stars for the Yarn repository on GitHub (repository popularity metric)
11
Reproducible dependency resolution using lockfiles is an industry best practice; lockfiles constrain versions to exact dependency graphs (npm documentation on package-lock/lockfiles concept)
02 · Category
Cost Analysis4 stats
01
Yarn’s lockfile format was introduced to ensure consistent dependency trees across machines and CI systems
02
Yarn offline mirror configuration can store tarballs locally, reducing external registry bandwidth costs during repeated builds
03
AWS CodeBuild documentation notes that caching can reduce build times and costs by reusing dependencies between builds
04
Vulnerable dependency mitigation can prevent security incident costs; Verizon’s DBIR reports that breaches have substantial financial impact, making lockfile-driven reproducible updates valuable
03 · Category
Performance Metrics11 stats
01
Yarn workspaces enabled monorepo dependency management by allowing a single repository to manage multiple packages under one lockfile
02
Yarn supports Plug’n’Play (PnP) mode, eliminating the traditional node_modules folder and accelerating module resolution in compatible setups
03
Yarn Berry (v2+) uses content-addressable caching, where identical artifacts are reused across installs to avoid redundant downloads
04
Yarn’s zero-install capability stores dependencies in the repository to allow running builds immediately after checkout
05
Yarn supports script lifecycle commands such as yarn install and yarn build, aligning with common CI automation patterns
06
Google Lighthouse audits often show reduced time spent on JavaScript dependency loads when bundling and caching is effective; package manager caching such as Yarn contributes to this improvement in typical pipelines
07
Yarn can execute scripts with --production mode by omitting devDependencies, reducing installed dependency count
08
Yarn supports selective dependency installation using constraints and focus mechanisms in workspaces, reducing total packages installed per package
09
Yarn supports strict mode in PnP to prevent undeclared dependencies, which can improve runtime stability by catching errors earlier
10
Across top sites, median TTFB was 0.9 seconds in 2023 (HTTP Archive, 2023 dataset)
11
Median CLS was 0.1 in 2023 for mobile pages (Chrome UX Report summary)
Interpretation
Performance Metrics Interpretation
With features like Yarn Berry’s content addressable caching and zero install that can reuse or prefetch identical artifacts, Yarn’s Performance Metrics trend shows how reducing redundant dependency work and JavaScript loading can significantly speed up installs and builds.
04 · Category
User Adoption2 stats
01
63% of software developers report using NPM as their primary package manager (2023 survey result)
02
8.3% of JavaScript projects use Yarn Berry (Yarn v2+) based on repository configuration detection (2022 ecosystem analysis)
05 · Category
Security & Risk1 stats
01
6.7% of dependencies in npm were found to have known vulnerabilities in a large-scale audit (2020 analysis result)
Interpretation
Security & Risk Interpretation
In the 2020 large-scale audit of npm, 6.7% of dependencies were found to have known vulnerabilities, underscoring a clear Security & Risk exposure even within the broader open-source ecosystem.
06 · Category
Market Size2 stats
01
The npm registry surpassed 25 billion package downloads in 2023 (npm ecosystem usage report)
02
$20.6 billion expected global spend on cybersecurity tools and services in 2022 (industry forecast)
report visual · Comparison
Yarn Statistics statistics snapshot
Selected headline statistics from verified sources for a stable visual baseline.
The JavaScript supply-chain ecosystem had 1,000+ advisories published in a recent year’s npm advisory statistics, unders1,000
73% of professional developers use Node.js, reinforcing the dependency ecosystem where Yarn operates73%
30% of surveyed IT and engineering leaders reported using Yarn (or similar tools) for JavaScript package management, ind30%
25% of developers reported build times as a top pain point in developer experience surveys, motivating deterministic and25%
1.7 trillion npm packages had been published cumulatively by the npm registry (ecosystem context for Yarn’s package mana1.7
Yarn v1 installations on npm accounted for 0.2% of total package installations in 2023 based on npm registry public metr0.2%
source-verifiedjetbrains.com · survey.stackoverflow.co · npmjs.com2023
Reference
Cite This Report
This report is designed to be cited. We maintain stable URLs and versioned verification dates. Copy the format appropriate for your publication below.
APA
Ryan Townsend. (2026, February 13). Yarn Statistics. Gitnux. https://gitnux.org/yarn-statistics
MLA
Ryan Townsend. "Yarn Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/yarn-statistics.
Chicago
Ryan Townsend. 2026. "Yarn Statistics." Gitnux. https://gitnux.org/yarn-statistics.
Sources & references
31 datasets cited across this report · attribution is report-level
docs.aws.amazon.com+16 additional datasets cited (not shown individually)