GitHub Actions Caching

Optimize CI/CD build times with caching strategies.

Dependency Caching

- uses: actions/setup-node@v4
  with:
    node-version: 20
    cache: "yarn"

# Or manual caching
- uses: actions/cache@v4
  with:
    path: node_modules
    key: ${{ runner.os }}-modules-${{ hashFiles('yarn.lock') }}
    restore-keys: |
      ${{ runner.os }}-modules-

NX Build Cache

- uses: actions/cache@v4
  with:
    path: .nx/cache
    key: ${{ runner.os }}-nx-${{ hashFiles('yarn.lock') }}-${{ github.sha }}
    restore-keys: |
      ${{ runner.os }}-nx-${{ hashFiles('yarn.lock') }}-
      ${{ runner.os }}-nx-

Docker Layer Caching

- uses: docker/build-push-action@v5
  with:
    cache-from: type=gha
    cache-to: type=gha,mode=max

Cache Strategy Table

Asset	Key Based On	TTL
node_modules	yarn.lock hash	7 days
NX cache	yarn.lock + SHA	7 days
Docker layers	Dockerfile + deps	Auto
Build artifacts	Source hash	1 day

Impact

Without Cache	With Cache	Savings
~8 min install	~30s restore	~93%
~10 min build	~2 min	~80%
~5 min Docker	~1 min	~80%

Related Pages

• CI/CD Pipeline — CI setup
• CI Test Pipeline — test CI
• Docker Optimization — Docker builds