pnpm vs npm
JavaScript Package Managers Comparison
1 Year
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What's JavaScript Package Managers?

JavaScript package managers are essential tools for managing project dependencies, automating tasks, and facilitating the sharing of code. They allow developers to install, update, and manage libraries and packages efficiently, ensuring that projects can leverage external code while maintaining compatibility and version control. npm (Node Package Manager) is the default package manager for Node.js, widely used for its extensive registry and community support. pnpm (Performant NPM) is an alternative that focuses on performance and disk space efficiency by using a unique symlinked structure for package installations, reducing redundancy and improving speed.

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Package
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pnpm20,101,23830,86218.7 MB1,782an hour agoMIT
npm6,175,3818,70111.8 MB672a month agoArtistic-2.0
Feature Comparison: pnpm vs npm

Installation Speed

  • pnpm:

    pnpm installs packages in parallel and uses a content-addressable storage system to avoid duplication, resulting in significantly faster installation times compared to npm.

  • npm:

    npm installs packages sequentially, which can lead to longer installation times, especially with large dependency trees. However, it has improved its speed with recent updates and caching mechanisms.

Disk Space Efficiency

  • pnpm:

    pnpm uses a symlinked structure, meaning it stores a single copy of each package on disk and links to it from the project, drastically reducing disk space usage.

  • npm:

    npm creates a separate copy of each package in the node_modules directory, which can lead to large disk usage, especially with multiple projects using the same dependencies.

Dependency Management

  • pnpm:

    pnpm maintains a strict dependency tree, ensuring that each package has access only to its declared dependencies, which can help avoid issues related to version conflicts.

  • npm:

    npm manages dependencies using a flat dependency tree, which can sometimes lead to version conflicts but simplifies the structure of node_modules.

Community and Ecosystem

  • pnpm:

    pnpm is gaining popularity and has a growing community, but its ecosystem is not as extensive as npm's. However, it is compatible with npm packages, allowing users to leverage the existing npm ecosystem.

  • npm:

    npm has a massive ecosystem with millions of packages available, making it the go-to choice for many developers. It also has extensive documentation and community support.

Configuration and Customization

  • pnpm:

    pnpm offers additional configuration options for optimizing installations and managing workspace projects, providing more flexibility for advanced users.

  • npm:

    npm provides a straightforward configuration system through the package.json file, allowing for easy customization of scripts and dependencies.

How to Choose: pnpm vs npm
  • pnpm:

    Choose pnpm if you prioritize performance and disk space efficiency, especially for large projects with many dependencies. Its unique approach to package management can significantly speed up installations and reduce the overall size of your node_modules directory.

  • npm:

    Choose npm if you are looking for a widely adopted package manager with a vast ecosystem, extensive documentation, and community support. It is suitable for most projects, especially if you need a straightforward solution without additional complexity.

README for pnpm

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pnpm

Fast, disk space efficient package manager:

  • Fast. Up to 2x faster than the alternatives (see benchmark).
  • Efficient. Files inside node_modules are linked from a single content-addressable storage.
  • Great for monorepos.
  • Strict. A package can access only dependencies that are specified in its package.json.
  • Deterministic. Has a lockfile called pnpm-lock.yaml.
  • Works as a Node.js version manager. See pnpm env use.
  • Works everywhere. Supports Windows, Linux, and macOS.
  • Battle-tested. Used in production by teams of all sizes since 2016.
  • See the full feature comparison with npm and Yarn.

To quote the Rush team:

Microsoft uses pnpm in Rush repos with hundreds of projects and hundreds of PRs per day, and we’ve found it to be very fast and reliable.

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Background

pnpm uses a content-addressable filesystem to store all files from all module directories on a disk. When using npm, if you have 100 projects using lodash, you will have 100 copies of lodash on disk. With pnpm, lodash will be stored in a content-addressable storage, so:

  1. If you depend on different versions of lodash, only the files that differ are added to the store. If lodash has 100 files, and a new version has a change only in one of those files, pnpm update will only add 1 new file to the storage.
  2. All the files are saved in a single place on the disk. When packages are installed, their files are linked from that single place consuming no additional disk space. Linking is performed using either hard-links or reflinks (copy-on-write).

As a result, you save gigabytes of space on your disk and you have a lot faster installations! If you'd like more details about the unique node_modules structure that pnpm creates and why it works fine with the Node.js ecosystem, read this small article: Flat node_modules is not the only way.

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Installation

For installation options visit our website.

Usage

Just use pnpm in place of npm/Yarn. E.g., install dependencies via:

pnpm install

For more advanced usage, read pnpm CLI on our website, or run pnpm help.

Benchmark

pnpm is up to 2x faster than npm and Yarn classic. See all benchmarks here.

Benchmarks on an app with lots of dependencies:

Support

License

MIT