NPM vs Yarn Performance - Complete Guide

# Performance Comparison

# 1. Installation Speed Test
# Test with 1000 packages
time npm install
time yarn install

# 2. Cold Install (no cache)
rm -rf node_modules package-lock.json yarn.lock
time npm install
time yarn install

# 3. Warm Install (with cache)
time npm ci
time yarn install --frozen-lockfile

# 4. Package Resolution Speed
npm ls --depth=0
yarn list --depth=0

# 5. Cache Performance
npm cache verify
yarn cache dir
yarn cache clean

# 6. Parallel Installation
# NPM (v7+)
npm install --prefer-offline

# Yarn
yarn install --network-timeout 100000

# 7. Network Performance
npm install --registry https://registry.npmjs.org/
yarn install --registry https://registry.yarnpkg.com/

# 8. Memory Usage
# Monitor during installation
npm install --verbose
yarn install --verbose

# 9. Disk Usage
du -sh node_modules/
du -sh ~/.npm/
du -sh ~/.yarn/

# 10. Bundle Analysis
npm install --dry-run
yarn install --dry-run

# Feature Comparison

# 1. Lock File Management
# NPM
npm install
# Generates package-lock.json

# Yarn
yarn install
# Generates yarn.lock

# 2. Workspace Support
# NPM Workspaces
npm init -w packages/app
npm install -w packages/app

# Yarn Workspaces
yarn workspace app add react
yarn workspaces info

# 3. Script Management
# NPM Scripts
npm run build
npm run test
npm run start

# Yarn Scripts
yarn build
yarn test
yarn start

# 4. Package Publishing
# NPM
npm publish
npm unpublish
npm version patch

# Yarn
yarn publish
yarn version

# 5. Security Features
# NPM Audit
npm audit
npm audit fix

# Yarn Audit
yarn audit
yarn audit --fix

# 6. Dependency Management
# NPM
npm install package@version
npm uninstall package
npm update

# Yarn
yarn add package@version
yarn remove package
yarn upgrade

# 7. Global Packages
# NPM
npm install -g package
npm list -g --depth=0

# Yarn
yarn global add package
yarn global list

# 8. Configuration
# NPM
npm config set registry https://registry.npmjs.org/
npm config list

# Yarn
yarn config set registry https://registry.yarnpkg.com/
yarn config list

# 9. Cache Management
# NPM
npm cache clean --force
npm cache verify

# Yarn
yarn cache clean
yarn cache dir

# 10. Offline Mode
# NPM
npm install --offline
npm install --prefer-offline

# Yarn
yarn install --offline
yarn install --prefer-offline

# Performance Optimization

# 1. NPM Optimization
# Use npm ci for production
npm ci

# Enable parallel installation
npm install --prefer-offline

# Use npm cache
npm config set cache ~/.npm
npm cache verify

# Optimize registry
npm config set registry https://registry.npmjs.org/

# 2. Yarn Optimization
# Use frozen lockfile
yarn install --frozen-lockfile

# Enable parallel installation
yarn install --network-timeout 100000

# Use Yarn cache
yarn cache dir
yarn cache clean

# Optimize registry
yarn config set registry https://registry.yarnpkg.com/

# 3. Dependency Optimization
# Remove unused dependencies
npm prune
yarn install --check-files

# Use exact versions
npm install --save-exact
yarn add --exact

# 4. Workspace Optimization
# NPM Workspaces
npm install --workspaces
npm run build --workspaces

# Yarn Workspaces
yarn install --frozen-lockfile
yarn workspaces run build

# 5. Cache Optimization
# NPM Cache
npm config set cache-max 10000000000
npm config set cache-min 3600

# Yarn Cache
yarn config set cache-folder ~/.yarn-cache
yarn config set enable-mirror true

# 6. Network Optimization
# Use CDN registry
npm config set registry https://registry.npmmirror.com/
yarn config set registry https://registry.npmmirror.com/

# 7. Memory Optimization
# Increase memory limit
NODE_OPTIONS="--max-old-space-size=4096" npm install
NODE_OPTIONS="--max-old-space-size=4096" yarn install

# 8. Disk Optimization
# Use symlinks
npm install --no-bin-links
yarn install --no-bin-links

# 9. Build Optimization
# Skip optional dependencies
npm install --no-optional
yarn install --ignore-optional

# 10. CI/CD Optimization
# Use npm ci
npm ci --only=production

# Use yarn install --frozen-lockfile
yarn install --frozen-lockfile --production