feat: improve response handler performance

bdraco · bdraco · commit 8df8b393abbf · 2024-09-25T08:58:56.000-05:00
diff --git a/src/zeroconf/_listener.pxd b/src/zeroconf/_listener.pxd
@@ -52,6 +52,7 @@ cdef class AsyncListener:
         tuple v6_flow_scope
     )
 
+    @cython.locals(packets=list)
     cpdef void _respond_query(
         self,
         object msg,
diff --git a/src/zeroconf/_listener.py b/src/zeroconf/_listener.py
@@ -237,7 +237,7 @@ def _respond_query(
         """Respond to a query and reassemble any truncated deferred packets."""
         self._cancel_any_timers_for_addr(addr)
         packets = self._deferred.pop(addr, [])
-        if msg:
+        if msg is not None:
             packets.append(msg)
 
         self._query_handler.handle_assembled_query(packets, addr, port, transport, v6_flow_scope)
