Add __slots__ to internal classes.

Speeds _Feed creation up a bit during tokenization. Keep public classes
slotless for flexibility.

1 files changed, 6 insertions, 0 deletions

diff --git a/kconfiglib.py b/kconfiglib.py
index 27b8ac9..a6d1f5d 100644
--- a/kconfiglib.py
+++ b/kconfiglib.py
@@ -3070,6 +3070,10 @@ class _Feed(object):
     """Class for working with sequences in a stream-like fashion; handy for
     tokens."""
 
+    # This would be more helpful on the item classes, but would remove some
+    # flexibility
+    __slots__ = ['items', 'length', 'i']
+
     def __init__(self, items):
         self.items = items
         self.length = len(self.items)
@@ -3106,6 +3110,8 @@ class _FileFeed(object):
     careful to get the line number right in the presence of continuation
     lines."""
 
+    __slots__ = ['filename', 'lines', 'length', 'linenr']
+
     def __init__(self, filename):
         self.filename = _clean_up_path(filename)
         with open(filename, "r") as f: