BaseObject: don't create event handler tasks if none is registered

CHANGELOG.md

@@ -81,7 +81,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-- Fixed an issue with `CartesiaTTSService` where `TTSTextFrame` messages weren't being emitted when the model was set to `sonic`. This resulted in the assistant context not being updated with assistant messages.
+- Fixed an issue with `CartesiaTTSService` where `TTSTextFrame` messages weren't
+  being emitted when the model was set to `sonic`. This resulted in the
+  assistant context not being updated with assistant messages.
+
+### Performance
+
+- Don't create event handler tasks if no user event handlers have been
+  registered.
 
 ### Other
 

src/pipecat/utils/base_object.py

@@ -59,6 +59,11 @@ class BaseObject(ABC):
         self._event_handlers[event_name] = []
 
     async def _call_event_handler(self, event_name: str, *args, **kwargs):
+        # If we haven't registered an event handler, we don't need to do
+        # anything.
+        if not self._event_handlers.get(event_name):
+            return
+
         # Create the task.
         task = asyncio.create_task(self._run_task(event_name, *args, **kwargs))