Creating a new ChromaDB client on every call is inefficient

[g-eoj]

Creating a new ChromaDB client on every call is inefficient. Consider creating a singleton client instance or caching it at module level.

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}

Originally posted by @greptile-apps[bot] in #1 (comment)