Use scandir() to avoid separate is_dir() syscall (#4273)

conda · Apr 28, 2022 · 4d1d522 · 4d1d522
1 parent 3268fdd
commit 4d1d522
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/conda_build/index.py b/conda_build/index.py
@@ -789,8 +789,11 @@ def index(self, patch_generator, hotfix_source_repo=None, verbose=False, progres
 
         with utils.LoggingContext(level, loggers=[__name__]):
             if not self._subdirs:
-                detected_subdirs = {subdir for subdir in os.listdir(self.channel_root)
-                                    if subdir in utils.DEFAULT_SUBDIRS and isdir(join(self.channel_root, subdir))}
+                detected_subdirs = {
+                    subdir.name
+                    for subdir in os.scandir(self.channel_root)
+                    if subdir.name in utils.DEFAULT_SUBDIRS and subdir.is_dir()
+                }
                 log.debug("found subdirs %s" % detected_subdirs)
                 self.subdirs = subdirs = sorted(detected_subdirs | {'noarch'})
             else: