Yasir•2mo ago

Python Client: Is set_auth() thread-safe for concurrent requests?

Context: I'm building a FastAPI backend that serves multiple concurrent users. To optimize Convex WebSocket connection overhead (~400-600ms per new connection), I want to reuse a single ConvexClient instance across requests and call set_auth(user_token) per-request. Current Setup:

     # Per-request (current - slow but safe)
     def handle_request(user_token: str):
         client = ConvexClient(CONVEX_URL)  # New connection each time
         client.set_auth(user_token)
         return client.query("getPrivateData", {})

     # Proposed (fast but safe?)
     shared_client = ConvexClient(CONVEX_URL)  # Shared across requests

     def handle_request(user_token: str):
         shared_client.set_auth(user_token)  # Thread-safe?
         return shared_client.query("getPrivateData", {})

     # Per-request (current - slow but safe)
     def handle_request(user_token: str):
         client = ConvexClient(CONVEX_URL)  # New connection each time
         client.set_auth(user_token)
         return client.query("getPrivateData", {})

     # Proposed (fast but safe?)
     shared_client = ConvexClient(CONVEX_URL)  # Shared across requests

     def handle_request(user_token: str):
         shared_client.set_auth(user_token)  # Thread-safe?
         return shared_client.query("getPrivateData", {})

Question: Is ConvexClient.set_auth(token) thread-safe in the Python client (v0.7.0)? Specifically: • If Request A calls set_auth(token_A) followed by Request B calling set_auth(token_B) before A's query executes, will A's query use the correct token? • Does set_auth() mutate shared connection-level state, or is auth tracked per-query somehow? What I'm seeing: • Per-request clients work but have high latency (965ms per query) • Shared client would reduce latency, but I need to confirm data isolation between users What I'd like: Either confirmation that shared client + per-request set_auth() is safe, OR recommended approach for connection pooling in multi-threaded Python environments. Thanks! ────────────────────────────────────────── • Python client: 0.7.0 • Python: 3.13

2 Replies

Convex Bot•2mo ago

Thanks for posting in <#1088161997662724167>. Reminder: If you have a Convex Pro account, use the Convex Dashboard to file support tickets. - Provide context: What are you trying to achieve, what is the end-user interaction, what are you seeing? (full error message, command output, etc.) - Use search.convex.dev to search Docs, Stack, and Discord all at once. - Additionally, you can post your questions in the Convex Community's <#1228095053885476985> channel to receive a response from AI. - Avoid tagging staff unless specifically instructed. Thank you!

YasirOP•2mo ago

It is crucial blocker for my app development. Can someone from convex team please guide?

Python Client: Is set_auth() thread-safe for concurrent requests?

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