分销商APP选型：Firebase Realtime Database vs Cloud Firestore 速度与定价对比

Hey there! Let's break this down clearly for your distributor app use case—since you're focused on speed and lower costs, here's a straightforward comparison:

Speed Comparison #

• Firebase Realtime Database: This real-time, JSON-tree based database is built for instant synchronization. For your core workflows—like updating individual store product sales counts (small, frequent writes) and keeping store lists synced in real-time—it’s faster. It uses incremental data sync, so only changed bits are transmitted, and maintains a persistent connection that cuts down on latency for live updates. If you need distributors’ sales entries to show up immediately (e.g., for real-time inventory tracking), this is the faster option for those specific operations.
• Cloud Firestore: A document-oriented NoSQL database with flexible querying. While it’s fast for bulk reads (like pulling a full store list), it’s slightly slower than Realtime Database for small, frequent real-time writes. This is because Firestore syncs at the document level, which adds a tiny bit of overhead compared to Realtime Database’s tree-based incremental sync. For non-realtime operations, the speed difference is negligible.

Pricing Mechanisms #

Firebase Realtime Database #

• Free Tier (Spark Plan): 5GB storage, 10GB outbound bandwidth, and 1 million total read/write/delete operations per month. Great for early-stage apps with moderate usage.
• Paid Tier (Blaze Plan): Pay-as-you-go pricing:
  • Storage: $0.18 per GB/month
  • Outbound Bandwidth: $0.12 per GB
  • Operations: $5 per 1 million writes, $2 per 1 million reads, $1 per 1 million deletes
    Note: Since it’s a tree structure, be careful with data nesting—accidentally reading nested data (e.g., pulling a store list and its full sales history when you only need the list) can eat into your operation counts and increase costs.

Cloud Firestore #

• Free Tier (Spark Plan): 5GB storage, 10GB outbound bandwidth, but only 20,000 reads, 50,000 writes, 20,000 deletes per month. This is way lower than Realtime Database’s free operation limits, so it might hit capacity faster if you have frequent sales logging.
• Paid Tier (Blaze Plan): Pay-as-you-go pricing with finer-grained billing:
  • Storage: $0.18 per GB/month (same as Realtime Database)
  • Outbound Bandwidth: $0.12 per GB (same as Realtime Database)
  • Operations: $0.06 per 100,000 reads, $0.18 per 100,000 writes, $0.02 per 100,000 deletes
    Note: Firestore’s querying lets you fetch only the data you need (e.g., just store names without sales data), which can reduce unnecessary operation counts. For high-volume write scenarios, its per-write cost is cheaper than Realtime Database.

Final Recommendation #

• Speed: If your app relies heavily on instant, small updates (like logging sales to a store), Firebase Realtime Database is faster. For bulk store list reads, both are comparable.
• Cost: Start with Realtime Database if you’re in the early stages—its free tier gives way more operations for frequent sales logging. If you scale to high write volumes later, Firestore’s lower per-write cost might become more economical, provided you structure your data to avoid unnecessary reads.

内容的提问来源于stack exchange，提问作者Sardor AKayumov