status: prefer relative paths in Rust code
… when the repository root is under the current directory,
so the kernel needs to traverse fewer directory in every call
to `read_dir` or `symlink_metadata`.
Better yet would be to use libc functions like `openat` and `fstatat`
to remove such repeated traversals entirely, but the standard library
does not provide APIs based on those.
Maybe with a crate like https://crates.io/crates/openat instead?
Benchmarks of `rhg status` show that this patch is neutral in some configurations,
and makes the command up to ~20% faster in others.
Below is semi-arbitrary subset of results. The four numeric columns are:
time (in seconds) with this changeset’s parent, time with this changeset,
time difference (negative is better), time ratio (less than 1 is better).
```
mercurial-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.0061 -> 0.0059: -0.0002 (0.97)
mercurial-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0029 -> 0.0028: -0.0001 (0.97)
mozilla-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.2110 -> 0.2102: -0.0007 (1.00)
mozilla-dirstate-v2 | default-copies-clean.ignored.pbr | 0.0489 -> 0.0401: -0.0088 (0.82)
mozilla-dirstate-v2 | default-copies-clean.no-iu.pbr | 0.0479 -> 0.0393: -0.0085 (0.82)
mozilla-dirstate-v2 | default-copies-large.all.pbr | 0.1262 -> 0.1210: -0.0051 (0.96)
mozilla-dirstate-v2 | default-copies-small.ignored-unknown.pbr | 0.1262 -> 0.1200: -0.0062 (0.95)
mozilla-dirstate-v2 | default-copies-small.ignored.pbr | 0.0536 -> 0.0417: -0.0119 (0.78)
mozilla-dirstate-v2 | default-copies-small.no-iu.pbr | 0.0482 -> 0.0393: -0.0089 (0.81)
mozilla-dirstate-v2 | default-plain-clean.ignored.pbr | 0.0518 -> 0.0402: -0.0116 (0.78)
mozilla-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0481 -> 0.0392: -0.0088 (0.82)
mozilla-dirstate-v2 | default-plain-large.all.pbr | 0.1271 -> 0.1218: -0.0052 (0.96)
mozilla-dirstate-v2 | default-plain-small.ignored-unknown.pbr | 0.1225 -> 0.1202: -0.0022 (0.98)
mozilla-dirstate-v2 | default-plain-small.ignored.pbr | 0.0510 -> 0.0418: -0.0092 (0.82)
mozilla-dirstate-v2 | default-plain-small.no-iu.pbr | 0.0480 -> 0.0394: -0.0086 (0.82)
netbeans-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.1442 -> 0.1422: -0.0020 (0.99)
netbeans-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0325 -> 0.0282: -0.0043 (0.87)
```
Differential Revision: https://phab.mercurial-scm.org/D12175
from __future__ import absolute_import, print_function
import unittest
from mercurial.utils import urlutil
class ParseRequestTests(unittest.TestCase):
def testparse(self):
self.assertEqual(
urlutil.parseurl(b'http://example.com/no/anchor'),
(b'http://example.com/no/anchor', (None, [])),
)
self.assertEqual(
urlutil.parseurl(b'http://example.com/an/anchor#foo'),
(b'http://example.com/an/anchor', (b'foo', [])),
)
self.assertEqual(
urlutil.parseurl(
b'http://example.com/no/anchor/branches', [b'foo']
),
(b'http://example.com/no/anchor/branches', (None, [b'foo'])),
)
self.assertEqual(
urlutil.parseurl(
b'http://example.com/an/anchor/branches#bar', [b'foo']
),
(b'http://example.com/an/anchor/branches', (b'bar', [b'foo'])),
)
self.assertEqual(
urlutil.parseurl(
b'http://example.com/an/anchor/branches-None#foo', None
),
(b'http://example.com/an/anchor/branches-None', (b'foo', [])),
)
self.assertEqual(
urlutil.parseurl(b'http://example.com/'),
(b'http://example.com/', (None, [])),
)
self.assertEqual(
urlutil.parseurl(b'http://example.com'),
(b'http://example.com/', (None, [])),
)
self.assertEqual(
urlutil.parseurl(b'http://example.com#foo'),
(b'http://example.com/', (b'foo', [])),
)
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)