view doc/runrst @ 51910:5d352e36ce06

rev-branch-cache: reenable memory mapping of the revision data

Now that we are no longer truncating it, we can mmap it again.

This provide a sizeable speedup on repository with a very large amount of
revision for example for a mozilla-try clone with 5 793 383 revisions, this
provide a speedup of 5ms - 10ms. Since they happens within the "critical" locked
path during push. These miliseconds are important.

In addition, the v3 branchmap format is use the rev-branch-cache more than the
v2 branchmap cache so this will be important.

On smaller repository we consistently see an improvement of one or two percents,
but the gain in absolute time is usually < 10 ms.

#### benchmark.name                                 = hg.command.unbundle
   # benchmark.variants.issue6528                   = disabled
   # benchmark.variants.reuse-external-delta-parent = yes
   # benchmark.variants.revs                        = any-1-extra-rev
   # benchmark.variants.source                      = unbundle
   # benchmark.variants.verbosity                   = quiet

 ### data-env-vars.name = mozilla-try-2024-03-26-zstd-sparse-revlog
  ## bin-env-vars.hg.flavor = default
e51161b12c7e: 3.527923
ebdcfe85b070: 3.468178   (-1.69%, -0.06)
  ## bin-env-vars.hg.flavor = rust
e51161b12c7e: 3.580158
ebdcfe85b070: 3.480564   (-2.78%, -0.10)
 ### data-env-vars.name = mozilla-try-2024-03-26-ds2-pnm
  ## bin-env-vars.hg.flavor = rust
e51161b12c7e: 3.527923
ebdcfe85b070: 3.468178 (-1.69%, -0.06)

#!/usr/bin/env python3
#
# runrst - register custom roles and run correct writer
#
# Copyright 2010 Olivia Mackall <[e-mail]> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

"""usage: %s WRITER args...

where WRITER is the name of a Docutils writer such as 'html' or 'manpage'
"""


import sys

try:
    import docutils.core as core
    import docutils.nodes as nodes
    import docutils.utils as utils
    import docutils.parsers.rst.roles as roles
except ImportError:
    sys.stderr.write(
        "abort: couldn't generate documentation: docutils "
        "module is missing\n"
    )
    sys.stderr.write(
        "please install python-docutils or see "
        "http://docutils.sourceforge.net/\n"
    )
    sys.exit(-1)


def role_hg(name, rawtext, text, lineno, inliner, options=None, content=None):
    text = "hg " + utils.unescape(text)
    linktext = nodes.literal(rawtext, text)
    parts = text.split()
    cmd, args = parts[1], parts[2:]
    refuri = "hg.1.html#%s" % cmd
    if cmd == 'help' and args:
        if args[0] == 'config':
            # :hg:`help config`
            refuri = "hgrc.5.html"
        elif args[0].startswith('config.'):
            # :hg:`help config.SECTION...`
            refuri = "hgrc.5.html#%s" % args[0].split('.', 2)[1]
        elif len(args) >= 2 and args[0] == '-c':
            # :hg:`help -c COMMAND ...` is equivalent to :hg:`COMMAND`
            # (mainly for :hg:`help -c config`)
            refuri = "hg.1.html#%s" % args[1]
        else:
            refuri = "hg.1.html#%s" % args[0]
    node = nodes.reference(rawtext, '', linktext, refuri=refuri)
    return [node], []


roles.register_local_role("hg", role_hg)

if __name__ == "__main__":
    if len(sys.argv) < 2:
        sys.stderr.write(__doc__ % sys.argv[0])
        sys.exit(1)

    writer = sys.argv[1]
    del sys.argv[1]

    core.publish_cmdline(writer_name=writer)