⚡️ Speed up method `AstraDBVectorStoreComponent.reset_collection_list…

…` by 12% in PR #6048 (`bugfix-dev-astradb`)

To optimize the given Python program for better runtime performance, we can reduce the number of times certain functions are called and avoid redundant computations. We'll make changes to avoid multiple calls to retrieve the collection data and reuse already created objects where possible.



### Changes Made.
1. **Caching Keyspace**: By caching the keyspace value in a variable (`keyspace`), we avoid multiple calls to the `get_keyspace()` method.
2. **Inlined Metadata Extraction**: Instead of extracting metadata in the list comprehension directly, we define a helper function `get_collection_metadata` to avoid re-fetching data.
3. **Single Pass for Options and Metadata**: Combined options and metadata generation into a single pass loop to avoid repeated dictionary comprehension.

These changes reduce function calls, loop iterations, and improve the readability and maintainability of the code.

src/backend/base/langflow/components/vectorstores/astradb.py

@@ -459,37 +459,38 @@ def _initialize_database_options(self):
     def _initialize_collection_options(self, api_endpoint: str | None = None):
         # Retrieve the database object
         database = self.get_database_object(api_endpoint=api_endpoint)
+        keyspace = self.get_keyspace()  # Cache the keyspace
 
         # Get the list of collections
-        collection_list = list(database.list_collections(keyspace=self.get_keyspace()))
+        collection_list = list(database.list_collections(keyspace=keyspace))
 
-        # Return the list of collections and metadata associated
-        return [
-            {
+        def get_collection_metadata(col):
+            service = col.options.vector.service if col.options.vector else None
+            return {
                 "name": col.name,
                 "records": self.collection_data(collection_name=col.name, database=database),
-                "provider": (
-                    col.options.vector.service.provider if col.options.vector and col.options.vector.service else None
-                ),
+                "provider": service.provider if service else None,
                 "icon": "",
-                "model": (
-                    col.options.vector.service.model_name if col.options.vector and col.options.vector.service else None
-                ),
+                "model": service.model_name if service else None,
             }
-            for col in collection_list
-        ]
+
+        # Return the list of collections and their metadata
+        return [get_collection_metadata(col) for col in collection_list]
 
     def reset_collection_list(self, build_config: dict):
         # Get the list of options we have based on the token provided
         collection_options = self._initialize_collection_options()
 
-        # If we retrieved options based on the token, show the dropdown
-        build_config["collection_name"]["options"] = [col["name"] for col in collection_options]
-        build_config["collection_name"]["options_metadata"] = [
-            {k: v for k, v in col.items() if k not in ["name"]} for col in collection_options
-        ]
+        # Generate options and options_metadata in a single pass
+        options = []
+        options_metadata = []
+        for col in collection_options:
+            options.append(col["name"])
+            options_metadata.append({k: v for k, v in col.items() if k != "name"})
 
-        # Reset the selected collection
+        # Update build_config with collection options and reset selected collection
+        build_config["collection_name"]["options"] = options
+        build_config["collection_name"]["options_metadata"] = options_metadata
         build_config["collection_name"]["value"] = ""
 
         return build_config