Sorry, I don't understand the problem.Can someone please give the result of these commands on Python 3.6 and 3.7 on macOS?Example on Linux (Fedora 29):$ python3>>> import platform, time>>> platform.platform()'Linux-4.20.13-200.fc29.x86_64-x86_64-with-fedora-29-Twenty_Nine'>>> for clock in ('monotonic', 'perf_counter', 'process_time', 'thread_time', 'time'): print(f'clock: {time.get_clock_info(clock)}')... clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_MONOTONIC)', monotonic=True, resolution=1e-09)clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_MONOTONIC)', monotonic=True, resolution=1e-09)clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_PROCESS_CPUTIME_ID)', monotonic=True, resolution=1e-09)clock: namespace(adjustable=False, implementation='clock_gettime(CLOCK_THREAD_CPUTIME_ID)', monotonic=True, resolution=1e-09)clock: namespace(adjustable=True, implementation='clock_gettime(CLOCK_REALTIME)', monotonic=False, resolution=1e-09)