cicdgithub actionsPractitioner

Speed Up Your CI/CD with GitHub Actions Caching

5 min read GitHub DocsApr 28, 2026Reviewed for accuracy

Practitioner — Hands-on experience recommended

In the fast-paced world of software development, every second counts. Caching dependencies in GitHub Actions is a game-changer for speeding up your workflows. By storing and reusing dependencies, you can avoid the overhead of downloading them on every build, leading to faster feedback loops and more efficient CI/CD processes.

The caching mechanism works by utilizing a key to identify your cache. When you run a job, GitHub Actions first checks for a cache hit—an exact match to the provided key. If it finds one, it restores the cache, saving you time. If not, it looks for partial matches using restore-keys that you can define. If all attempts fail, a cache miss occurs, and a new cache is created if the job completes successfully. You can specify multiple paths to cache, and the cache version helps manage metadata for better organization.

In practice, you need to be strategic about your cache keys and restore-keys. For example, using the hash of your package-lock.json file in the key ensures that your cache is updated only when your dependencies change. However, be cautious not to store sensitive information in your cache paths, as this can lead to security vulnerabilities. Remember, caching is not a silver bullet; it requires careful management to avoid stale dependencies and cache bloat.

Key takeaways

→Understand cache hits and misses to optimize your CI/CD workflows.
→Utilize restore-keys for partial cache matches to improve cache efficiency.
→Define cache paths carefully to avoid unnecessary downloads.
→Avoid storing sensitive information in cache paths.
→Leverage cache versioning to manage your dependencies effectively.

Why it matters

In production, reducing build times can lead to faster deployments and quicker iterations on features. This directly impacts your team's productivity and responsiveness to market changes.

Code examples

YAML

1- name: Cache Gradle packages
2  uses: actions/cache@v4
3  with:
4    path: |
5      ~/.gradle/caches
6      ~/.gradle/wrapper

YAML

restore-keys:|
  npm-feature-${{ hashFiles('package-lock.json') }}
  npm-feature-
  npm-

YAML

1name: Caching with npm
2  on: push
3  jobs:
4    build:
5      runs-on: ubuntu-latest
6      steps:
7        - uses: actions/checkout@v6
8        - name: Cache node modules
9          id: cache-npm
10          uses: actions/cache@v4
11          env:
12            cache-name: cache-node-modules
13          with:
14            path: ~/.npm
15            key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
16            restore-keys: |
17              ${{ runner.os }}-build-${{ env.cache-name }}-
18              ${{ runner.os }}-build-
19              ${{ runner.os }}-