util: entrypoint: Speed up named loads

Signed-off-by: John Andersen <[email protected]>

Author: John Andersen

CHANGELOG.md

@@ -17,6 +17,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   property is a class which has been decorated with dffml.base.config to make it
   a dataclass.
 - Speed up development service install of all plugins in development mode
+- Speed up named plugin load times
 ### Fixed
 - DataFlows with multiple possibilities for a source for an input, now correctly
   look through all possible sources instead of just the first one.

dffml/util/entrypoint.py

@@ -135,6 +135,9 @@ def load(cls, loading=None):
         loaded_names = []
         loading_classes = []
         for i in pkg_resources.iter_entry_points(cls.ENTRY_POINT):
+            loaded_names.append(i.name)
+            if loading is not None and i.name != loading:
+                continue
             try:
                 loaded = i.load()
             except Exception as error:
@@ -146,7 +149,6 @@ def load(cls, loading=None):
                 raise
             loaded.ENTRY_POINT_LABEL = i.name
             if issubclass(loaded, cls):
-                loaded_names.append(i.name)
                 loading_classes.append(loaded)
                 if loading is not None and i.name == loading:
                     return loaded