comparison mercurial/scmutil.py @ 44858:5d8ae9248a70

scmutil: speed up relativization of paths when it's a no-op

Running commands from the root is commmon, in particular for
automation. Running `hg files > /tmp/a` from the root of
mozilla-central on linux:

before:
real	0m1,510s
user	0m1,387s
sys	0m0,090s

after:
real	0m1,266s
user	0m1,165s
sys	0m0,073s

(there are 280k paths, so this was costing ~1us per path somehow)

Differential Revision: https://phab.mercurial-scm.org/D8585

44857:e607099d8b93

                    _(b"ui.relative-paths is not a boolean ('%s')") % config
                )

    if relative:
        cwd = repo.getcwd()
        pathto = repo.pathto
        return lambda f: pathto(f, cwd)
    elif repo.ui.configbool(b'ui', b'slash'):
        return lambda f: f
    else:
        return util.localpath

44858:5d8ae9248a70

                    _(b"ui.relative-paths is not a boolean ('%s')") % config
                )

    if relative:
        cwd = repo.getcwd()
        if cwd != b'':
            # this branch is correct when cwd == b'', ie cwd = repo root,
            # but it's slower
            pathto = repo.pathto
            return lambda f: pathto(f, cwd)
    if repo.ui.configbool(b'ui', b'slash'):
        return lambda f: f
    else:
        return util.localpath