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

     1

from __future__ import absolute_import, print_function

     2

import os

     3

from mercurial import (

     4

    commands,

     5

    extensions,

     6

    ui as uimod,

     7

)

     8

     9

ignore = {b'highlight', b'win32text', b'factotum', b'beautifygraph'}

    10

    11

try:

    12

    import sqlite3

    13

    14

    del sqlite3  # unused, just checking that import works

    15

except ImportError:

    16

    ignore.add(b'sqlitestore')

    17

    18

if os.name != 'nt':

    19

    ignore.add(b'win32mbcs')

    20

    21

disabled = [ext for ext in extensions.disabled().keys() if ext not in ignore]

    22

    23

hgrc = open(os.environ["HGRCPATH"], 'wb')

    24

hgrc.write(b'[extensions]\n')

    25

    26

for ext in disabled:

    27

    hgrc.write(ext + b'=\n')

    28

    29

hgrc.close()

    30

    31

u = uimod.ui.load()

    32

extensions.loadall(u)

    33

extensions.populateui(u)

    34

    35

globalshort = set()

    36

globallong = set()

    37

for option in commands.globalopts:

    38

    option[0] and globalshort.add(option[0])

    39

    option[1] and globallong.add(option[1])

    40

    41

for cmd, entry in commands.table.items():

    42

    seenshort = globalshort.copy()

    43

    seenlong = globallong.copy()

    44

    for option in entry[1]:

    45

        if (option[0] and option[0] in seenshort) or (

    46

            option[1] and option[1] in seenlong

    47

        ):

    48

            print("command '" + cmd + "' has duplicate option " + str(option))

    49

        seenshort.add(option[0])

    50

        seenlong.add(option[1])