New submission from STINNER Victor <victor.stin...@gmail.com>: The behaviour of the time.clock() function is not portable: on Windows it mesures wall-clock, whereas it measures CPU time on Unix. Python has time.process_time() and time.perf_counter(), since Python 3.3, which are portable, well defined and have a better resolution.
time.clock() was deprecated in Python 3.3 documentation, but calling time.clock() didn't raise a DeprecationWarning. I proposed to remove it from Python 3.7. Sometimes, a deprecated function raises a DeprecationWarning in Python version N, before removing it from Python version N. time.clock() doesn't emit such warning, but I consider that it is possible to remove it anyway. While it can be annoying to have to patch code to no more use time.clock(), I consider that it's worth it for portability and better clock resolution. Attached PR removes time.clock() and time.get_clock_info() doens't accept 'clock' anymore. Current time.clock() documentation: ---------------------------- .. function:: clock() .. index:: single: CPU time single: processor time single: benchmarking On Unix, return the current processor time as a floating point number expressed in seconds. The precision, and in fact the very definition of the meaning of "processor time", depends on that of the C function of the same name. On Windows, this function returns wall-clock seconds elapsed since the first call to this function, as a floating point number, based on the Win32 function :c:func:`QueryPerformanceCounter`. The resolution is typically better than one microsecond. .. deprecated:: 3.3 The behaviour of this function depends on the platform: use :func:`perf_counter` or :func:`process_time` instead, depending on your requirements, to have a well defined behaviour. ---------------------------- ---------- components: Library (Lib) messages: 304502 nosy: haypo priority: normal severity: normal status: open versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue31803> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com