contrib: make perf.py use absolute_import

contrib/perf.py

@@ -1,12 +1,26 b''
 # perf.py - performance test routines
 '''helper extension to measure performance'''
 
-from mercurial import cmdutil, scmutil, util, commands, obsolete
-from mercurial import repoview, branchmap, merge, copies, error, revlog
-from mercurial import mdiff
-import time, os, sys
+from __future__ import absolute_import
+import functools
+import os
 import random
-import functools
+import sys
+import time
+from mercurial import (
+    branchmap,
+    cmdutil,
+    commands,
+    copies,
+    error,
+    mdiff,
+    merge,
+    obsolete,
+    repoview,
+    revlog,
+    scmutil,
+    util,
+)
 
 formatteropts = commands.formatteropts
 revlogopts = commands.debugrevlogopts

tests/test-check-py3-compat.t

@@ -5,7 +5,6 b''
   $ hg files 'set:(**.py)' | sed 's|\\|/|g' | xargs python contrib/check-py3-compat.py
   contrib/import-checker.py not using absolute_import
   contrib/import-checker.py requires print_function
-  contrib/perf.py not using absolute_import
   contrib/python-hook-examples.py not using absolute_import
   contrib/revsetbenchmarks.py not using absolute_import
   contrib/revsetbenchmarks.py requires print_function