content-hash-cache-pattern

Use SHA-256 content hashes as cache keys instead of file paths to cache file processing results. This content-hash approach automatically invalidates when content changes and survives file moves or renames.

Cache PDF parsing results using SHA-256 content hashes as cache keys. This avoids recomputation by storing JSON-based cache entries that automatically validate file content identity across repeated pipeline runs.

Content-hash caching computes a SHA-256 hash of file content as the cache key and stores results as {hash}.json files. This enables O(1) lookups without an index and auto-invalidates when file content changes.

Yes, use a service layer wrapper to apply content-hash caching separately. This keeps core file processing functions pure while adding caching as an external layer, preserving original processing logic.

Yes, content-hash caching works for PDFs, images, and text files. The SHA-256 content hash keys treat all file types identically, caching expensive processing results regardless of file format.

Avoid content-hash caching when files change constantly or processing is inexpensive, since SHA-256 hashing adds overhead. It is best suited for pipelines that repeatedly process the same files where content identity matters.