diff options
| -rw-r--r-- | Lib/pathlib.py | 11 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Library/2023-04-14-21-16-05.gh-issue-103548.lagdpp.rst | 4 |
2 files changed, 14 insertions, 1 deletions
diff --git a/Lib/pathlib.py b/Lib/pathlib.py index 9aa3c1e..480c354 100644 --- a/Lib/pathlib.py +++ b/Lib/pathlib.py @@ -664,7 +664,7 @@ class PurePath(object): # ntpath.isabs() is defective - see GH-44626 . if self._flavour is ntpath: return bool(self.drive and self.root) - return self._flavour.isabs(self) + return self._flavour.isabs(self._raw_path) def is_reserved(self): """Return True if the path contains one of the special names reserved @@ -873,6 +873,15 @@ class Path(PurePath): cwd = self._flavour.abspath(self.drive) else: cwd = os.getcwd() + # Fast path for "empty" paths, e.g. Path("."), Path("") or Path(). + # We pass only one argument to with_segments() to avoid the cost + # of joining, and we exploit the fact that getcwd() returns a + # fully-normalized string by storing it in _str. This is used to + # implement Path.cwd(). + if not self.root and not self._tail: + result = self.with_segments(cwd) + result._str = cwd + return result return self.with_segments(cwd, self) def resolve(self, strict=False): diff --git a/Misc/NEWS.d/next/Library/2023-04-14-21-16-05.gh-issue-103548.lagdpp.rst b/Misc/NEWS.d/next/Library/2023-04-14-21-16-05.gh-issue-103548.lagdpp.rst new file mode 100644 index 0000000..238f286 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2023-04-14-21-16-05.gh-issue-103548.lagdpp.rst @@ -0,0 +1,4 @@ +Improve performance of :meth:`pathlib.Path.absolute` and +:meth:`~pathlib.Path.cwd` by joining paths only when necessary. Also improve +performance of :meth:`pathlib.PurePath.is_absolute` on Posix by skipping path +parsing and normalization. |