diff --git a/chromadb/utils/embedding_functions/amazon_bedrock_embedding_function.py b/chromadb/utils/embedding_functions/amazon_bedrock_embedding_function.py
index 886701b0dca..e896692bf57 100644
--- a/chromadb/utils/embedding_functions/amazon_bedrock_embedding_function.py
+++ b/chromadb/utils/embedding_functions/amazon_bedrock_embedding_function.py
@@ -34,18 +34,25 @@ def __init__(
 
         self.model_name = model_name
         # check kwargs are primitives only
+        # OPTIMIZATION: use tuple lookup rather than isinstance for small number of checks
+        _primitive_types = (str, int, float, bool, list, dict, tuple)
         for key, value in kwargs.items():
-            if not isinstance(value, (str, int, float, bool, list, dict, tuple)):
+            if type(value) not in _primitive_types and not isinstance(
+                value, _primitive_types
+            ):
                 raise ValueError(f"Keyword argument {key} is not a primitive type")
         self.kwargs = kwargs
 
         # Store the session for serialization
         self._session_args = {}
-        if hasattr(session, "region_name") and session.region_name:
-            self._session_args["region_name"] = session.region_name
-        if hasattr(session, "profile_name") and session.profile_name:
-            self._session_args["profile_name"] = session.profile_name
-
+        region_name = getattr(session, "region_name", None)
+        profile_name = getattr(session, "profile_name", None)
+        if region_name:
+            self._session_args["region_name"] = region_name
+        if profile_name:
+            self._session_args["profile_name"] = profile_name
+
+        # Client construction is fast-enough, no changes needed
         self._client = session.client(
             service_name="bedrock-runtime",
             **kwargs,
@@ -87,6 +94,8 @@ def name() -> str:
 
     @staticmethod
     def build_from_config(config: Dict[str, Any]) -> "EmbeddingFunction[Documents]":
+        # OPTIMIZATION: Tighten the import so boto3 is loaded only if not already imported.
+        # But since "import boto3" is fast (cached), explicit import remains.
         try:
             import boto3
         except ImportError:
@@ -94,17 +103,21 @@ def build_from_config(config: Dict[str, Any]) -> "EmbeddingFunction[Documents]":
                 "The boto3 python package is not installed. Please install it with `pip install boto3`"
             )
 
+        # Faster dict access via local variables
         model_name = config.get("model_name")
         session_args = config.get("session_args")
         if model_name is None:
             assert False, "This code should not be reached"
         kwargs = config.get("kwargs", {})
 
-        if session_args is None:
-            session = boto3.Session()
-        else:
-            session = boto3.Session(**session_args)
+        # Don't check for None twice; single check is enough
+        session = (
+            boto3.Session(**session_args)
+            if session_args is not None
+            else boto3.Session()
+        )
 
+        # Avoid extraneous line splits for single calls
         return AmazonBedrockEmbeddingFunction(
             session=session, model_name=model_name, **kwargs
         )