comparison mercurial/pycompat.py @ 37844:8fb9985382be

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

37843:670eb4fa1b86

if not ispy3:
    import cookielib
    import cPickle as pickle
    import httplib
    import Queue as _queue
    import SocketServer as socketserver
    import xmlrpclib

    from .thirdparty.concurrent import futures

else:
    import concurrent.futures as futures
    import http.cookiejar as cookielib
    import http.client as httplib
    import pickle
    import queue as _queue
    import socketserver
    import xmlrpc.client as xmlrpclib

    def future_set_exception_info(f, exc_info):
        f.set_exception(exc_info[0])

empty = _queue.Empty
queue = _queue.Queue

def identity(a):
    return a

if ispy3:

37844:8fb9985382be

if not ispy3:
    import cookielib
    import cPickle as pickle
    import httplib
    import Queue as queue
    import SocketServer as socketserver
    import xmlrpclib

    from .thirdparty.concurrent import futures

else:
    import concurrent.futures as futures
    import http.cookiejar as cookielib
    import http.client as httplib
    import pickle
    import queue as queue
    import socketserver
    import xmlrpc.client as xmlrpclib

    def future_set_exception_info(f, exc_info):
        f.set_exception(exc_info[0])

def identity(a):
    return a

if ispy3: