hgperf: update to conform with import style checks

contrib/hgperf

@@ -1,98 +1,100 b''
 #!/usr/bin/env python
 #
 # hgperf - measure performance of Mercurial commands
 #
 # Copyright 2014 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
 '''measure performance of Mercurial commands
 
 Using ``hgperf`` instead of ``hg`` measures performance of the target
 Mercurial command. For example, the execution below measures
 performance of :hg:`heads --topo`::
 
     $ hgperf heads --topo
 
 All command output via ``ui`` is suppressed, and just measurement
 result is displayed: see also "perf" extension in "contrib".
 
 Costs of processing before dispatching to the command function like
 below are not measured::
 
     - parsing command line (e.g. option validity check)
     - reading configuration files in
 
 But ``pre-`` and ``post-`` hook invocation for the target command is
 measured, even though these are invoked before or after dispatching to
 the command function, because these may be required to repeat
 execution of the target command correctly.
 '''
 
 import os
 import sys
 
 libdir = '@LIBDIR@'
 
 if libdir != '@' 'LIBDIR' '@':
     if not os.path.isabs(libdir):
         libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
                               libdir)
         libdir = os.path.abspath(libdir)
     sys.path.insert(0, libdir)
 
 # enable importing on demand to reduce startup time
 try:
     from mercurial import demandimport; demandimport.enable()
 except ImportError:
     import sys
     sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
                      ' '.join(sys.path))
     sys.stderr.write("(check your install and PYTHONPATH)\n")
     sys.exit(-1)
 
-import mercurial.util
-import mercurial.dispatch
+from mercurial import (
+    dispatch,
+    util,
+)
 
 def timer(func, title=None):
     results = []
-    begin = mercurial.util.timer()
+    begin = util.timer()
     count = 0
     while True:
         ostart = os.times()
-        cstart = mercurial.util.timer()
+        cstart = util.timer()
         r = func()
-        cstop = mercurial.util.timer()
+        cstop = util.timer()
         ostop = os.times()
         count += 1
         a, b = ostart, ostop
         results.append((cstop - cstart, b[0] - a[0], b[1]-a[1]))
         if cstop - begin > 3 and count >= 100:
             break
         if cstop - begin > 10 and count >= 3:
             break
     if title:
         sys.stderr.write("! %s\n" % title)
     if r:
         sys.stderr.write("! result: %s\n" % r)
     m = min(results)
     sys.stderr.write("! wall %f comb %f user %f sys %f (best of %d)\n"
                      % (m[0], m[1] + m[2], m[1], m[2], count))
 
-orgruncommand = mercurial.dispatch.runcommand
+orgruncommand = dispatch.runcommand
 
 def runcommand(lui, repo, cmd, fullargs, ui, options, d, cmdpats, cmdoptions):
     ui.pushbuffer()
     lui.pushbuffer()
     timer(lambda : orgruncommand(lui, repo, cmd, fullargs, ui,
                                  options, d, cmdpats, cmdoptions))
     ui.popbuffer()
     lui.popbuffer()
 
-mercurial.dispatch.runcommand = runcommand
+dispatch.runcommand = runcommand
 
 for fp in (sys.stdin, sys.stdout, sys.stderr):
-    mercurial.util.setbinary(fp)
+    util.setbinary(fp)
 
-mercurial.dispatch.run()
+dispatch.run()