Question 1

How does Sente compare to Socket.IO for realtime apps?

Accepted Answer

Sente is tailored for Clojure/Script with a unified API over WebSockets and Ajax, offering efficient Clojure serialization, while Socket.IO is JavaScript-focused with more plugins. Sente integrates better with Clojure ecosystems but has a smaller community.

Question 2

How to set up authentication with Sente and Ring?

Accepted Answer

Use standard Ring middleware for authentication by wrapping Sente routes; the README mentions integration with Ring security models, so you can leverage existing auth libraries like Buddy or custom middleware to secure connections.

Question 3

Does Sente support binary data transmission efficiently?

Accepted Answer

Yes, Sente supports high-speed binary serialization for arbitrary Clojure values, allowing efficient transmission of binary data since v1.21, which reduces overhead compared to JSON serialization.

Question 4

How to handle multiple client connections per user in Sente?

Accepted Answer

Sente provides realtime info on connected users and supports multiple simultaneous connections via user IDs; you can manage sessions by tracking connections in server state, but room or group logic requires custom implementation.

Question 5

What are Sente's performance benchmarks for high traffic?

Accepted Answer

The README highlights efficient design with event batching for low-bandwidth use, but specific benchmarks aren't provided; performance depends on factors like web server choice and serialization, so testing in your environment is recommended.

Question 6

How to scale Sente for a large number of concurrent users?

Accepted Answer

Scaling requires using multiple server instances with a shared session store, as Sente doesn't include built-in clustering; you'll need to implement custom solutions based on your web server, such as using Redis for state management.

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