firestore

Databases

Why Cursor Pagination Beats Skip in a Metered Database

skip(N) reads and discards every document it steps over, and a per-read database charges you for all of them. Here is the arithmetic, the query that replaces it, and the tie-breaker that keeps order stable.

Jul 21, 2026 7 min read databasespaginationfirestoreperformancecost

Databases

The retryWrites=false Trap in Firestore's MongoDB Compatibility

Firestore speaks the MongoDB wire protocol, but rejects retryable writes. If your driver defaults to on, writes fail in a way that looks random. Here is why, and the fix.

Jul 19, 2026 7 min read firestoremongodbgoidempotencydatabases