Terry J. Reedy <tjre...@udel.edu> added the comment: This is pretty useless on Windows because you are using a clock with 15-16 milli (not micro) second resolution on Windows. Before Victor introduced time.perf_counter, with decent behavior on all systems, timeit used different time module functions on Windows and *nix because the two different functions had such different behavior on the two systems. I believe it used time.clock on Windows (1 second resolution of *nix?) and time.time otherwise (.016 sec resolution on Windows).
Time.monotonic seems to be based on time.time as it has the same low resolution on Windows. Run something like for i in range(1000): time.monotonic() and you will see identical times except for 1 or 2 jumps of .016. So the C equivalent or time.clock or time.perf_counter is needed on Windows. Victor can advise as he knows this better than me. An example of nearly useless output, with 15-16 millisecond resolution. f:\dev\3x>python -X importtime -c "import idlelib.pyshell" Running Debug|Win32 interpreter... import time: self [us] | cumulative | imported package import time: 0 | 0 | _codecs import time: 0 | 0 | codecs import time: 0 | 0 | encodings.aliases import time: 15000 | 15000 | encodings import time: 0 | 0 | encodings.utf_8 import time: 0 | 0 | _signal import time: 0 | 0 | encodings.latin_1 import time: 0 | 0 | _weakrefset import time: 0 | 0 | abc import time: 0 | 0 | io import time: 0 | 0 | _stat import time: 0 | 0 | stat import time: 0 | 0 | genericpath import time: 0 | 0 | ntpath import time: 0 | 0 | _collections_abc import time: 16000 | 16000 | os import time: 0 | 0 | _sitebuiltins import time: 0 | 0 | sitecustomize import time: 0 | 0 | usercustomize import time: 16000 | 32000 | site import time: 0 | 0 | idlelib import time: 0 | 0 | types import time: 0 | 0 | _collections import time: 0 | 0 | enum import time: 16000 | 16000 | _tkinter import time: 0 | 0 | tkinter.constants import time: 0 | 0 | _sre import time: 0 | 0 | sre_constants import time: 0 | 0 | sre_parse import time: 0 | 0 | sre_compile import time: 0 | 0 | _functools import time: 0 | 0 | _operator import time: 0 | 0 | operator import time: 0 | 0 | keyword import time: 0 | 0 | _heapq import time: 0 | 0 | heapq import time: 0 | 0 | itertools import time: 15000 | 15000 | reprlib import time: 0 | 15000 | collections import time: 0 | 15000 | functools import time: 0 | 0 | _locale import time: 0 | 0 | copyreg import time: 16000 | 31000 | re import time: 0 | 47000 | tkinter import time: 0 | 0 | tkinter.commondialog import time: 16000 | 16000 | tkinter.messagebox import time: 0 | 0 | token import time: 0 | 0 | tokenize import time: 0 | 0 | linecache import time: 0 | 0 | traceback import time: 15000 | 15000 | __future__ import time: 0 | 15000 | codeop import time: 0 | 15000 | code import time: 0 | 0 | time import time: 0 | 0 | signal import time: 0 | 0 | warnings import time: 0 | 0 | errno import time: 0 | 0 | threading import time: 0 | 0 | msvcrt import time: 0 | 0 | _winapi import time: 16000 | 16000 | subprocess import time: 16000 | 32000 | platform import time: 0 | 0 | _socket import time: 0 | 0 | collections.abc import time: 0 | 0 | math import time: 0 | 0 | select import time: 0 | 0 | selectors import time: 15000 | 15000 | socket import time: 16000 | 16000 | configparser import time: 0 | 0 | tkinter.font import time: 0 | 0 | _bootlocale import time: 0 | 0 | encodings.cp1252 import time: 31000 | 47000 | idlelib.config import time: 0 | 0 | idlelib.delegator import time: 63000 | 110000 | idlelib.colorizer import time: 0 | 0 | posixpath import time: 0 | 0 | fnmatch import time: 0 | 0 | _ast import time: 15000 | 15000 | ast import time: 0 | 0 | _opcode import time: 0 | 0 | opcode import time: 0 | 0 | dis import time: 16000 | 16000 | importlib import time: 0 | 16000 | importlib.machinery import time: 0 | 31000 | inspect import time: 0 | 31000 | bdb import time: 0 | 0 | tkinter.ttk import time: 0 | 0 | idlelib.macosx import time: 0 | 0 | idlelib.scrolledlist import time: 0 | 0 | idlelib.windows import time: 0 | 31000 | idlelib.debugger import time: 16000 | 16000 | idlelib.debugger_r import time: 0 | 0 | importlib.abc import time: 0 | 0 | contextlib import time: 0 | 0 | importlib.util import time: 0 | 0 | _string import time: 15000 | 15000 | string import time: 0 | 0 | shlex import time: 0 | 0 | zlib import time: 0 | 0 | _compression import time: 0 | 0 | _bz2 import time: 16000 | 16000 | bz2 import time: 0 | 0 | _lzma import time: 0 | 0 | lzma import time: 0 | 0 | pwd import time: 0 | 0 | grp import time: 0 | 16000 | shutil import time: 0 | 16000 | webbrowser import time: 15000 | 15000 | tkinter.simpledialog import time: 0 | 0 | tkinter.colorchooser import time: 0 | 0 | idlelib.config_key import time: 0 | 0 | weakref import time: 0 | 0 | org import time: 0 | 0 | org.python import time: 0 | 0 | org.python.core import time: 0 | 0 | copy import time: 0 | 0 | idlelib.dynoption import time: 0 | 0 | tkinter.dialog import time: 16000 | 16000 | tkinter.filedialog import time: 0 | 16000 | idlelib.query import time: 0 | 0 | idlelib.tabbedpages import time: 0 | 0 | idlelib.textview import time: 0 | 0 | idlelib.multicall import time: 0 | 0 | idlelib.autocomplete_w import time: 0 | 0 | idlelib.pyparse import time: 16000 | 16000 | idlelib.hyperparser import time: 15000 | 31000 | idlelib.autocomplete import time: 0 | 0 | idlelib.codecontext import time: 0 | 0 | idlelib.parenmatch import time: 0 | 0 | idlelib.paragraph import time: 0 | 47000 | idlelib.configdialog import time: 0 | 0 | idlelib.searchbase import time: 0 | 0 | idlelib.searchengine import time: 0 | 0 | idlelib.grep import time: 16000 | 16000 | html.entities import time: 0 | 16000 | html import time: 0 | 0 | _markupbase import time: 16000 | 32000 | html.parser import time: 0 | 32000 | idlelib.help import time: 0 | 0 | idlelib.help_about import time: 0 | 0 | idlelib.replace import time: 0 | 0 | idlelib.search import time: 0 | 0 | idlelib.redirector import time: 0 | 0 | idlelib.percolator import time: 15000 | 15000 | idlelib.undo import time: 0 | 0 | _hashlib import time: 0 | 0 | _blake2 import time: 0 | 0 | _sha3 import time: 0 | 0 | hashlib import time: 0 | 0 | _bisect import time: 0 | 0 | bisect import time: 0 | 0 | _random import time: 0 | 0 | random import time: 0 | 0 | tempfile import time: 16000 | 16000 | locale import time: 0 | 16000 | idlelib.iomenu import time: 0 | 0 | idlelib.mainmenu import time: 0 | 0 | idlelib.statusbar import time: 0 | 0 | idlelib.autoexpand import time: 15000 | 15000 | textwrap import time: 0 | 0 | idlelib.calltip_w import time: 0 | 15000 | idlelib.calltips import time: 0 | 0 | idlelib.rstrip import time: 0 | 0 | idlelib.zoomheight import time: 0 | 171000 | idlelib.editor import time: 0 | 0 | idlelib.filelist import time: 0 | 0 | idlelib.outwin import time: 0 | 0 | _struct import time: 0 | 0 | struct import time: 0 | 0 | _compat_pickle import time: 0 | 0 | org import time: 0 | 0 | org.python import time: 0 | 0 | org.python.core import time: 0 | 0 | _pickle import time: 0 | 0 | pickle import time: 0 | 0 | queue import time: 16000 | 16000 | socketserver import time: 16000 | 32000 | idlelib.rpc import time: 0 | 0 | idlelib.debugobj_r import time: 0 | 0 | idlelib.tree import time: 0 | 0 | idlelib.debugobj import time: 0 | 0 | idlelib.stackviewer import time: 0 | 0 | idlelib.run import time: 0 | 0 | idlelib.history import time: 30000 | 515000 | idlelib.pyshell ---------- nosy: +terry.reedy status: closed -> open _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue31415> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
