From 6689fd253f7bd9ef3ca54011da6d15827ef7077c Mon Sep 17 00:00:00 2001
From: Chris Sewell <chrisj_sewell@hotmail.com>
Date: Thu, 12 Aug 2021 10:00:45 +0200
Subject: [PATCH] cache `eps()`

---
 aiida/plugins/entry_point.py | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/aiida/plugins/entry_point.py b/aiida/plugins/entry_point.py
index 5b7c22abc9..7591531b4d 100644
--- a/aiida/plugins/entry_point.py
+++ b/aiida/plugins/entry_point.py
@@ -17,7 +17,7 @@
 # but was then updated in python 3.10 to use an improved API.
 # So for now we use the backport importlib_metadata package.
 from importlib_metadata import EntryPoint, EntryPoints
-from importlib_metadata import entry_points as eps
+from importlib_metadata import entry_points as _eps
 
 from aiida.common.exceptions import MissingEntryPointError, MultipleEntryPointError, LoadingEntryPointError
 
@@ -27,6 +27,11 @@
 ENTRY_POINT_STRING_SEPARATOR = ':'
 
 
+@functools.lru_cache(maxsize=1)
+def eps():
+    return _eps()
+
+
 class EntryPointFormat(enum.Enum):
     """
     Enum to distinguish between the various possible entry point string formats. An entry point string
@@ -194,7 +199,6 @@ def load_entry_point_from_string(entry_point_string: str) -> Any:
     return load_entry_point(group, name)
 
 
-@functools.lru_cache(maxsize=100)
 def load_entry_point(group: str, name: str) -> Any:
     """
     Load the class registered under the entry point for a given name and group
@@ -218,7 +222,6 @@ def load_entry_point(group: str, name: str) -> Any:
     return loaded_entry_point
 
 
-@functools.lru_cache(maxsize=None)
 def get_entry_point_groups() -> Set[str]:
     """
     Return a list of all the recognized entry point groups
@@ -237,7 +240,6 @@ def get_entry_point_names(group: str, sort: bool = True) -> List[str]:
     return group_names
 
 
-@functools.lru_cache(maxsize=None)
 def get_entry_points(group: str) -> EntryPoints:
     """
     Return a list of all the entry points within a specific group
@@ -248,7 +250,6 @@ def get_entry_points(group: str) -> EntryPoints:
     return eps().select(group=group)
 
 
-@functools.lru_cache(maxsize=None)
 def get_entry_point(group: str, name: str) -> EntryPoint:
     """
     Return an entry point with a given name within a specific group
@@ -267,6 +268,7 @@ def get_entry_point(group: str, name: str) -> EntryPoint:
     return found[name]
 
 
+@functools.lru_cache(maxsize=100)
 def get_entry_point_from_class(class_module: str, class_name: str) -> Tuple[Optional[str], Optional[EntryPoint]]:
     """
     Given the module and name of a class, attempt to obtain the corresponding entry point if it exists
@@ -330,7 +332,7 @@ def is_valid_entry_point_string(entry_point_string: str) -> bool:
     return group in ENTRY_POINT_GROUP_TO_MODULE_PATH_MAP
 
 
-@functools.lru_cache(maxsize=None)
+@functools.lru_cache(maxsize=100)
 def is_registered_entry_point(class_module: str, class_name: str, groups: Optional[Sequence[str]] = None) -> bool:
     """Verify whether the class with the given module and class name is a registered entry point.