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How to use mach_timebase_info method in pytest-benchmark

Best Python code snippet using pytest-benchmark

timing.py

Source:timing.py

...30    # From <mach/mach_time.h>31    KERN_SUCCESS = 032    libSystem = ctypes.CDLL('/usr/lib/libSystem.dylib', use_errno=True)33    mach_timebase_info = libSystem.mach_timebase_info34    class struct_mach_timebase_info(ctypes.Structure):35        _fields_ = [('numer', ctypes.c_uint32), ('denom', ctypes.c_uint32)]36    mach_timebase_info.argtypes = [ctypes.POINTER(struct_mach_timebase_info)]37    mach_ti = struct_mach_timebase_info()38    ret = mach_timebase_info(ctypes.byref(mach_ti))39    if ret != KERN_SUCCESS:40        raise Exception('Could not get mach_timebase_info, error: ' + str(ret))41    mach_absolute_time = libSystem.mach_absolute_time42    mach_absolute_time.restype = ctypes.c_uint6443    def _monotonic_time_nanos_darwin():44        return (mach_absolute_time() * mach_ti.numer) / mach_ti.denom45    monotonic_time_nanos = _monotonic_time_nanos_darwin46elif platform.system() == 'Windows':47    # From <Winbase.h>48    perf_frequency = ctypes.c_uint64()49    ctypes.windll.kernel32.QueryPerformanceFrequency(ctypes.byref(perf_frequency))50    def _monotonic_time_nanos_windows():51        perf_counter = ctypes.c_uint64()52        ctypes.windll.kernel32.QueryPerformanceCounter(ctypes.byref(perf_counter))...

_time.py

Source:_time.py

...32        mach_timebase_info = lib.mach_timebase_info33        mach_timebase_info.restype = None34        mach_timebase_info.argtypes = [ctypes.POINTER(mach_timebase_info_t)]35        self._timebase = mach_timebase_info_t()36        mach_timebase_info(self._timebase)37        self._mach_absolute_time = lib.mach_absolute_time38        self._mach_absolute_time.restype = ctypes.c_uint6439        self._mach_absolute_time.argtypes = []40        self._start = self._mach_absolute_time()41    def monotonic(self):42        elapsed = self._mach_absolute_time() - self._start43        timestamp = elapsed * self._timebase.numerator / self._timebase.denominator44        sec, nsec = divmod(timestamp, 10 ** 9)45        return sec + nsec * (10 ** -9)46class LinuxTime(object):47    CLOCK_MONOTONIC = 148    _byref = ctypes.byref49    _strerror = os.strerror50    _get_errno = ctypes.get_errno...

mach_time.py

Source:mach_time.py

...12mach_timebase_info = CDLL(None).mach_timebase_info13mach_timebase_info.restype = c_int14mach_timebase_info.argtypes = (POINTER(mach_timebase_info_data_t),)15_info = mach_timebase_info_data_t()16mach_timebase_info(pointer(_info))17assert time.get_clock_info('monotonic').implementation == 'mach_absolute_time()'18# reconstruct value of t0 in19# https://github.com/python/cpython/blob/e42b705188271da108de42b55d9344642170aa2b/Python/pytime.c#L85520def pymonotonic_t0():21    t1 = time.monotonic()22    t2 = mach_absolute_time()23    t3 = time.monotonic()24    return t2 - int((t1+t3)/2 * 1e9 * _info.denom / _info.numer)25pymonotonic_t0 = int(np.array([pymonotonic_t0() for i in range(1000)], np.uint64).sum() / 1000 + .5)26def hostTimeToMonotonic(hostTime):27    return (hostTime - pymonotonic_t0) * _info.numer / _info.denom * 1e-928def monotonicToHostTime(monotonic):29    return int(monotonic * 1e9 * _info.denom / _info.numer) + pymonotonic_t030# partial derivatives...

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