comparison contrib/perf.py @ 37890:8fb9985382be

pycompat: export queue module instead of symbols in module (API)

Previously, pycompat and util re-exported individual symbols from the
queue module. This had the side-effect of forcing the loading of the
queue module whenever pycompat/util was imported.

These symbols aren't used very often. So importing the module to
get a handle on the symbols is wasteful.

This commit changes pycompat so it no longer exports the individual
symbols in the queue module. Instead, we make the imported module
a "public" symbol. We drop the individual symbol aliases from the
util module. All consumers are updated to use pycompat.queue.* instead.

This change makes 300 invocations of `hg log -r. -T '{rev}\n'` a little
faster:

before: 18.44s
after:  17.87s

Differential Revision: https://phab.mercurial-scm.org/D3441

37889:670eb4fa1b86

    from mercurial import pycompat
    getargspec = pycompat.getargspec  # added to module after 4.5
except (ImportError, AttributeError):
    import inspect
    getargspec = inspect.getargspec

# for "historical portability":
# define util.safehasattr forcibly, because util.safehasattr has been
# available since 1.9.3 (or 94b200a11cf7)
_undefined = object()

                elif blocks:
                    mdiff.bdiff.blocks(*pair)
                else:
                    mdiff.textdiff(*pair)
    else:
        q = util.queue()
        for i in xrange(threads):
            q.put(None)
        ready = threading.Condition()
        done = threading.Event()
        for i in xrange(threads):

37890:8fb9985382be

    from mercurial import pycompat
    getargspec = pycompat.getargspec  # added to module after 4.5
except (ImportError, AttributeError):
    import inspect
    getargspec = inspect.getargspec

try:
    # 4.7+
    queue = pycompat.queue.Queue
except (AttributeError, ImportError):
    # <4.7.
    try:
        queue = pycompat.queue
    except (AttributeError, ImportError):
        queue = util.queue

# for "historical portability":
# define util.safehasattr forcibly, because util.safehasattr has been
# available since 1.9.3 (or 94b200a11cf7)
_undefined = object()

                elif blocks:
                    mdiff.bdiff.blocks(*pair)
                else:
                    mdiff.textdiff(*pair)
    else:
        q = queue()
        for i in xrange(threads):
            q.put(None)
        ready = threading.Condition()
        done = threading.Event()
        for i in xrange(threads):