limit gRPC call rate to avoid overwhelming the server

Author: Mike Prosser

src/nipanel/_panel_client.py

@@ -4,6 +4,7 @@
 
 import logging
 import threading
+import time
 from typing import Callable, TypeVar
 
 import grpc
@@ -178,7 +179,9 @@ def _invoke_with_retry(
     ) -> _T:
         """Invoke a gRPC method with retry logic."""
         try:
-            return method(*args, **kwargs)
+            retval = method(*args, **kwargs)
+            time.sleep(0.001)  # limit gRPC call rate to avoid overwhelming the server
+            return retval
         except grpc.RpcError as e:
             if e.code() == grpc.StatusCode.UNAVAILABLE or e.code() == grpc.StatusCode.UNKNOWN:
                 # if the service is unavailable, we can retry the connection