Merge pull request #113 from jaraco/feature/glob-perf

Improve glob performance

Author: jaraco

newsfragments/106.feature.rst

@@ -0,0 +1 @@
+Bypass ZipFile.namelist in glob for better performance.

tests/test_complexity.py

@@ -85,7 +85,7 @@ def test_glob_depth(self):
             max_n=100,
             min_n=1,
         )
-        assert best <= big_o.complexities.Quadratic
+        assert best <= big_o.complexities.Linear
 
     @pytest.mark.flaky
     def test_glob_width(self):

zipp/__init__.py

@@ -402,7 +402,8 @@ def glob(self, pattern):
         prefix = re.escape(self.at)
         tr = Translator(seps='/')
         matches = re.compile(prefix + tr.translate(pattern)).fullmatch
-        return map(self._next, filter(matches, self.root.namelist()))
+        names = (data.filename for data in self.root.filelist)
+        return map(self._next, filter(matches, names))
 
     def rglob(self, pattern):
         return self.glob(f'**/{pattern}')