Avoid dynamic params search for Interpreter, fixes #1899

jedi/api/__init__.py

@@ -742,6 +742,14 @@ class Interpreter(Script):
 
         self.namespaces = namespaces
         self._inference_state.allow_descriptor_getattr = settings.instance_allow_descriptor_getattr
+        # Dynamic params search is important when we work on functions that are
+        # called by other pieces of code. However for interpreter completions
+        # this is not important at all, because the current code is always new
+        # and will never be called by something.
+        # Also sometimes this logic goes a bit too far like in
+        # https://github.com/ipython/ipython/issues/13866, where it takes
+        # seconds to do a simple completion.
+        self._inference_state.do_dynamic_params_search = False
 
     @cache.memoize_method
     def _get_module_context(self):

jedi/inference/__init__.py

@@ -99,6 +99,7 @@ class InferenceState:
         self.mixed_cache = {}  # see `inference.compiled.mixed._create()`
         self.analysis = []
         self.dynamic_params_depth = 0
+        self.do_dynamic_params_search = settings.dynamic_params
         self.is_analysis = False
         self.project = project
         self.access_cache = {}

jedi/inference/dynamic_params.py

@@ -66,11 +66,11 @@ def dynamic_param_lookup(function_value, param_index):
     have to look for all calls to ``func`` to find out what ``foo`` possibly
     is.
     """
-    funcdef = function_value.tree_node
+    if not function_value.inference_state.do_dynamic_params_search:
-
-    if not settings.dynamic_params:
         return NO_VALUES
 
+    funcdef = function_value.tree_node
+
     path = function_value.get_root_context().py__file__()
     if path is not None and is_stdlib_path(path):
         # We don't want to search for references in the stdlib. Usually people