Difference between Yarn and Npm

 

 

 

Yarn and npm (Node Package Manager) are package managers for JavaScript. They help developers manage project dependencies (libraries and tools that a project needs to function). Here are some key differences between Yarn and npm:

 

Yarn

 

Speed and Performance

# Yarn: Known for its faster performance compared to older versions of npm. Yarn achieves this speed through parallelized operations. It downloads packages in parallel and uses a global cache to reduce the need for repeated downloads.

# npm: While older versions of npm were slower, the newer versions (npm 5 and above) have improved significantly in terms of speed and performance. npm also introduced a caching mechanism, but its operations are not as parallelized as Yarn’s.

 

2. Lock Files

 # Yarn: Uses a `yarn.lock` file to lock the versions of the packages that are installed. This ensures that the same versions of dependencies are installed every time the project is built, leading to more consistent builds. 

 

 

 

# npm: Uses a `package-lock.json` file, which serves a similar purpose as Yarn’s `yarn.lock`. It was introduced in npm version 5 to improve the reliability of builds by ensuring that the exact same dependencies are installed for every build.

 

 

 

 

 3. Installation of Dependencies

 # Yarn: Installs dependencies from the top-level down, which can lead to better performance and fewer conflicts.
 

# npm: Traditionally, npm installed dependencies recursively, which could lead to larger `node_modules` directories and more conflicts. Recent versions of npm (npm 7+) use a similar approach to Yarn, flattening the `node_modules` hierarchy.

 

4. Security
 

# Yarn: Has a built-in feature to check for vulnerabilities in dependencies using the `yarn audit` command.

# npm: Also provides a similar feature with the `npm audit` command. In addition, npm automatically checks for vulnerabilities during installation and provides a summary.
 

 

5. Community and Ecosystem
 

# Yarn: Gained popularity quickly after its release and has a strong community. It is backed by Facebook, which contributed to its initial popularity.

# npm: Has been around longer and has a larger user base and community. It is maintained by GitHub (Microsoft).

 

 

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