Add comments for deferred imports with links to rationale.

AA-Turner · Mar 21, 2024 · 0dc96f1 · 0dc96f1
1 parent 5d01d0c
commit 0dc96f1
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diff --git a/Lib/importlib/metadata/__init__.py b/Lib/importlib/metadata/__init__.py
@@ -439,6 +439,7 @@ def metadata(self) -> _meta.PackageMetadata:
         The returned object will have keys that name the various bits of
         metadata.  See PEP 566 for details.
         """
+        # deferred for performance (python/cpython#109829)
         from . import _adapters
 
         opt_text = (

diff --git a/Lib/importlib/resources/_common.py b/Lib/importlib/resources/_common.py
@@ -107,7 +107,9 @@ def from_package(package: types.ModuleType):
     Return a Traversable object for the given package.
 
     """
+    # deferred for performance (python/cpython#109829)
     from ._adapters import wrap_spec
+
     spec = wrap_spec(package)
     reader = spec.loader.get_resource_reader(spec.name)
     return reader.files()