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How to use _libc_time method in pytest-benchmark

Best Python code snippet using pytest-benchmark

pep418.py

Source:pep418.py

...167        if hasattr(libc, 'time'):168            _libc__time = libc.time169            _libc__time.argtypes = (time_t_p,)170            _libc__time.restype = time_t171            def _libc_time():172                return _libc__time(None)173            has_libc_time = True174    if sys.platform.startswith(("freebsd", "openbsd")):175        librt_name = libc_name176    else:177        librt_name = ctypes.util.find_library('rt')178    if librt_name:179        librt = ctypes.CDLL(librt_name, use_errno=True)180        if hasattr(librt, 'clock_gettime'):181            clockid_t = ctypes.c_int182            class timespec(ctypes.Structure):183                _fields_ = (184                    ('tv_sec', time_t),185                    ('tv_nsec', ctypes.c_long),186                )187            timespec_p = POINTER(timespec)188            _clock_gettime = librt.clock_gettime189            _clock_gettime.argtypes = (clockid_t, timespec_p)190            _clock_gettime.restype = ctypes.c_int191            def clock_gettime(clk_id):192                ts = timespec()193                err = _clock_gettime(clk_id, byref(ts))194                if err:195                    raise ctypes_oserror()196                return ts.tv_sec + ts.tv_nsec * 1e-9197            has_clock_gettime = True198            _clock_settime = librt.clock_settime199            _clock_settime.argtypes = (clockid_t, timespec_p)200            _clock_settime.restype = ctypes.c_int201            def clock_settime(clk_id, value):202                ts = timespec()203                ts.tv_sec = int(value)204                ts.tv_nsec = int(float(abs(value)) % 1.0 * 1e9)205                err = _clock_settime(clk_id, byref(ts))206                if err:207                    raise ctypes_oserror()208                return ts.tv_sec + ts.tv_nsec * 1e-9209            _clock_getres = librt.clock_getres210            _clock_getres.argtypes = (clockid_t, timespec_p)211            _clock_getres.restype = ctypes.c_int212            def clock_getres(clk_id):213                ts = timespec()214                err = _clock_getres(clk_id, byref(ts))215                if err:216                    raise ctypes_oserror()217                return ts.tv_sec + ts.tv_nsec * 1e-9218            if sys.platform.startswith("linux"):219                CLOCK_REALTIME = 0220                CLOCK_MONOTONIC = 1221                CLOCK_PROCESS_CPUTIME_ID = 2222            elif sys.platform.startswith("freebsd"):223                CLOCK_REALTIME = 0224                CLOCK_PROF = 2225                CLOCK_MONOTONIC = 4226            elif sys.platform.startswith("openbsd"):227                CLOCK_REALTIME = 0228                CLOCK_MONOTONIC = 3229            elif sys.platform.startswith("sunos"):230                CLOCK_REALTIME = 3231                CLOCK_HIGHRES = 4232                # clock_gettime(CLOCK_PROCESS_CPUTIME_ID) fails with errno 22233                # on OpenSolaris234                # CLOCK_PROCESS_CPUTIME_ID = 5235def _clock_gettime_info(use_info, clk_id):236    value = clock_gettime(clk_id)237    if use_info:238        name = {239            CLOCK_MONOTONIC: 'CLOCK_MONOTONIC',240            CLOCK_PROF: 'CLOCK_PROF',241            CLOCK_HIGHRES: 'CLOCK_HIGHRES',242            CLOCK_PROCESS_CPUTIME_ID: 'CLOCK_PROCESS_CPUTIME_ID',243            CLOCK_REALTIME: 'CLOCK_REALTIME',244        }[clk_id]245        try:246            resolution = clock_getres(clk_id)247        except OSError:248            resolution = 1e-9249        info = {250            'implementation': 'clock_gettime(%s)' % name,251            'resolution': resolution,252        }253        if clk_id in (CLOCK_MONOTONIC, CLOCK_PROF, CLOCK_HIGHRES, CLOCK_PROCESS_CPUTIME_ID):254            info['monotonic'] = True255            info['adjustable'] = False256        elif clk_id in (CLOCK_REALTIME,):257            info['monotonic'] = False258            info['adjustable'] = True259    else:260        info = None261    return (value, info)262has_monotonic = False263if os.name == 'nt':264    # GetTickCount64() requires Windows Vista, Server 2008 or later265    if has_GetTickCount64:266        def _monotonic(use_info):267            value = GetTickCount64() * 1e-3268            if use_info:269                info = {270                    'implementation': "GetTickCount64()",271                    "monotonic": True,272                    "resolution": 1e-3,273                    "adjustable": False,274                }275                # FIXME: call GetSystemTimeAdjustment() to get the resolution276            else:277                info = None278            return (value, info)279        has_monotonic = True280    else:281        def _monotonic(use_info):282            ticks = GetTickCount()283            if ticks < _monotonic.last:284                # Integer overflow detected285                _monotonic.delta += 2**32286            _monotonic.last = ticks287            value = (ticks + _monotonic.delta) * 1e-3288            if use_info:289                info = {290                    'implementation': "GetTickCount()",291                    "monotonic": True,292                    "resolution": 1e-3,293                    "adjustable": False,294                }295                # FIXME: call GetSystemTimeAdjustment() to get the resolution296            else:297                info = None298            return (value, info)299        _monotonic.last = 0300        _monotonic.delta = 0301    has_monotonic = True302elif has_mach_absolute_time:303    def _monotonic(use_info):304        if _monotonic.factor is None:305            timebase = mach_timebase_info()306            _monotonic.factor = timebase[0] / timebase[1] * 1e-9307        value = mach_absolute_time() * _monotonic.factor308        if use_info:309            info = {310                'implementation': "mach_absolute_time()",311                'resolution': _monotonic.factor,312                'monotonic': True,313                'adjustable': False,314            }315        else:316            info = None317        return (value, info)318    _monotonic.factor = None319    has_monotonic = True320elif has_clock_gettime and CLOCK_HIGHRES is not None:321    def _monotonic(use_info):322        return _clock_gettime_info(use_info, CLOCK_HIGHRES)323    has_monotonic = True324elif has_clock_gettime and CLOCK_MONOTONIC is not None:325    def _monotonic(use_info):326        return _clock_gettime_info(use_info, CLOCK_MONOTONIC)327    has_monotonic = True328if has_monotonic:329    def monotonic():330        return _monotonic(False)[0]331def _perf_counter(use_info):332    info = None333    if _perf_counter.use_performance_counter:334        if _perf_counter.performance_frequency is None:335            value, info = _win_perf_counter(use_info)336            if value is not None:337                return (value, info)338    if _perf_counter.use_monotonic:339        # The monotonic clock is preferred over the system time340        try:341            return _monotonic(use_info)342        except (OSError, WindowsError):343            _perf_counter.use_monotonic = False344    return _time(use_info)345_perf_counter.use_performance_counter = (os.name == 'nt')346if _perf_counter.use_performance_counter:347    _perf_counter.performance_frequency = None348_perf_counter.use_monotonic = has_monotonic349def perf_counter():350    return _perf_counter(False)[0]351if os.name == 'nt':352    def _process_time(use_info):353        handle = GetCurrentProcess()354        process_times = GetProcessTimes(handle)355        value = (process_times[2] + process_times[3]) * 1e-7356        if use_info:357            info = {358                "implementation": "GetProcessTimes()",359                "resolution": 1e-7,360                "monotonic": True,361                "adjustable": False,362                # FIXME: call GetSystemTimeAdjustment() to get the resolution363            }364        else:365            info = None366        return (value, info)367else:368    import os369    try:370        import resource371    except ImportError:372        has_resource = False373    else:374        has_resource = True375    def _process_time(use_info):376        info = None377        if _process_time.clock_id is not None:378            try:379                return _clock_gettime_info(use_info, _process_time.clock_id)380            except OSError:381                _process_time.clock_id = None382        if _process_time.use_getrusage:383            try:384                usage = resource.getrusage(resource.RUSAGE_SELF)385                value = usage[0] + usage[1]386            except OSError:387                _process_time.use_getrusage = False388            else:389                if use_info:390                    info = {391                        "implementation": "getrusage(RUSAGE_SELF)",392                        "resolution": 1e-6,393                        "monotonic": True,394                        "adjustable": False,395                    }396                return (value, info)397        if _process_time.use_times:398            try:399                times = os.times()400                value = times[0] + times[1]401            except OSError:402                _process_time.use_getrusage = False403            else:404                if use_info:405                    try:406                        ticks_per_second = os.sysconf("SC_CLK_TCK")407                    except ValueError:408                        ticks_per_second = 60 # FIXME: get HZ constant409                    info = {410                        "implementation": "times()",411                        "resolution": 1.0 / ticks_per_second,412                        "monotonic": True,413                        "adjustable": False,414                    }415                return (value, info)416        return _libc_clock_info(use_info)417    if has_clock_gettime and CLOCK_PROCESS_CPUTIME_ID is not None:418        _process_time.clock_id = CLOCK_PROCESS_CPUTIME_ID419    elif has_clock_gettime and CLOCK_PROF is not None:420        _process_time.clock_id = CLOCK_PROF421    else:422        _process_time.clock_id = None423    _process_time.use_getrusage = has_resource424    # On OS/2, only the 5th field of os.times() is set, others are zeros425    _process_time.use_times = (hasattr(os, 'times') and os.name != 'os2')426def process_time():427    return _process_time(False)[0]428if os.name == "nt":429    def _time(use_info):430        value = GetSystemTimeAsFileTime() * 1e-7431        if use_info:432            info = {433                'implementation': 'GetSystemTimeAsFileTime',434                'resolution': 1e-7,435                'monotonic': False,436                # FIXME: call GetSystemTimeAdjustment() to get the resolution437                # and adjustable438            }439        else:440            info = None441        return (value, info)442else:443    def _time(use_info):444        info = None445        if has_clock_gettime and CLOCK_REALTIME is not None:446            try:447                return _clock_gettime_info(use_info, CLOCK_REALTIME)448            except OSError:449                # CLOCK_REALTIME is not supported (unlikely)450                pass451        if has_gettimeofday:452            try:453                tv = gettimeofday()454            except OSError:455                # gettimeofday() should not fail456                pass457            else:458                if use_info:459                    info = {460                        'monotonic': False,461                        "implementation": "gettimeofday()",462                        "resolution": 1e-6,463                        'monotonic': False,464                        'adjustable': True,465                    }466                value = tv.tv_sec + tv.tv_usec * 1e-6467                return (value, info)468        # FIXME: implement ftime()469        if has_ftime:470            if use_info:471                info = {472                    "implementation": "ftime()",473                    "resolution": 1e-3,474                    'monotonic': False,475                    'adjustable': True,476                }477            value = ftime()478        elif has_libc_time:479            if use_info:480                info = {481                    "implementation": "time()",482                    "resolution": 1.0,483                    'monotonic': False,484                    'adjustable': True,485                }486            value = float(_libc_time())487        else:488            if use_info:489                info = {490                    "implementation": "time.time()",491                    'monotonic': False,492                    'adjustable': True,493                }494                if os.name == "nt":495                    # On Windows, time.time() uses ftime()496                    info["resolution"] = 1e-3497                else:498                    # guess that time.time() uses gettimeofday()499                    info["resolution"] = 1e-6500            value = python_time.time()...

4a91107d34c429454e341349d8e18063_pep418.py

Source:4a91107d34c429454e341349d8e18063_pep418.py

...161        if hasattr(libc, 'time'):162            _libc__time = libc.time163            _libc__time.argtypes = (time_t_p,)164            _libc__time.restype = time_t165            def _libc_time():166                return _libc__time(None)167            has_libc_time = True168    if sys.platform.startswith(("freebsd", "openbsd")):169        librt_name = libc_name170    else:171        librt_name = ctypes.util.find_library('rt')172    if librt_name:173        librt = ctypes.CDLL(librt_name, use_errno=True)174        if hasattr(librt, 'clock_gettime'):175            clockid_t = ctypes.c_int176            class timespec(ctypes.Structure):177                _fields_ = (178                    ('tv_sec', time_t),179                    ('tv_nsec', ctypes.c_long),180                )181            timespec_p = POINTER(timespec)182            _clock_gettime = librt.clock_gettime183            _clock_gettime.argtypes = (clockid_t, timespec_p)184            _clock_gettime.restype = ctypes.c_int185            def clock_gettime(clk_id):186                ts = timespec()187                err = _clock_gettime(clk_id, byref(ts))188                if err:189                    raise ctypes_oserror()190                return ts.tv_sec + ts.tv_nsec * 1e-9191            has_clock_gettime = True192            _clock_settime = librt.clock_settime193            _clock_settime.argtypes = (clockid_t, timespec_p)194            _clock_settime.restype = ctypes.c_int195            def clock_settime(clk_id, value):196                ts = timespec()197                ts.tv_sec = int(value)198                ts.tv_nsec = int(float(abs(value)) % 1.0 * 1e9)199                err = _clock_settime(clk_id, byref(ts))200                if err:201                    raise ctypes_oserror()202                return ts.tv_sec + ts.tv_nsec * 1e-9203            _clock_getres = librt.clock_getres204            _clock_getres.argtypes = (clockid_t, timespec_p)205            _clock_getres.restype = ctypes.c_int206            def clock_getres(clk_id):207                ts = timespec()208                err = _clock_getres(clk_id, byref(ts))209                if err:210                    raise ctypes_oserror()211                return ts.tv_sec + ts.tv_nsec * 1e-9212            if sys.platform.startswith("linux"):213                CLOCK_REALTIME = 0214                CLOCK_MONOTONIC = 1215                CLOCK_PROCESS_CPUTIME_ID = 2216            elif sys.platform.startswith("freebsd"):217                CLOCK_REALTIME = 0218                CLOCK_PROF = 2219                CLOCK_MONOTONIC = 4220            elif sys.platform.startswith("openbsd"):221                CLOCK_REALTIME = 0222                CLOCK_MONOTONIC = 3223            elif sys.platform.startswith("sunos"):224                CLOCK_REALTIME = 3225                CLOCK_HIGHRES = 4226                # clock_gettime(CLOCK_PROCESS_CPUTIME_ID) fails with errno 22227                # on OpenSolaris228                # CLOCK_PROCESS_CPUTIME_ID = 5229def _clock_gettime_info(use_info, clk_id):230    value = clock_gettime(clk_id)231    if use_info:232        name = {233            CLOCK_MONOTONIC: 'CLOCK_MONOTONIC',234            CLOCK_PROF: 'CLOCK_PROF',235            CLOCK_HIGHRES: 'CLOCK_HIGHRES',236            CLOCK_PROCESS_CPUTIME_ID: 'CLOCK_PROCESS_CPUTIME_ID',237            CLOCK_REALTIME: 'CLOCK_REALTIME',238        }[clk_id]239        try:240            resolution = clock_getres(clk_id)241        except OSError:242            resolution = 1e-9243        info = {244            'implementation': 'clock_gettime(%s)' % name,245            'resolution': resolution,246        }247        if clk_id in (CLOCK_MONOTONIC, CLOCK_PROF, CLOCK_HIGHRES, CLOCK_PROCESS_CPUTIME_ID):248            info['monotonic'] = True249            info['adjustable'] = False250        elif clk_id in (CLOCK_REALTIME,):251            info['monotonic'] = False252            info['adjustable'] = True253    else:254        info = None255    return (value, info)256has_monotonic = False257if os.name == 'nt':258    # GetTickCount64() requires Windows Vista, Server 2008 or later259    if has_GetTickCount64:260        def _monotonic(use_info):261            value = GetTickCount64() * 1e-3262            if use_info:263                info = {264                    'implementation': "GetTickCount64()",265                    "monotonic": True,266                    "resolution": 1e-3,267                    "adjustable": False,268                }269                # FIXME: call GetSystemTimeAdjustment() to get the resolution270            else:271                info = None272            return (value, info)273        has_monotonic = True274    else:275        def _monotonic(use_info):276            ticks = GetTickCount()277            if ticks < _monotonic.last:278                # Integer overflow detected279                _monotonic.delta += 2**32280            _monotonic.last = ticks281            value = (ticks + _monotonic.delta) * 1e-3282            if use_info:283                info = {284                    'implementation': "GetTickCount()",285                    "monotonic": True,286                    "resolution": 1e-3,287                    "adjustable": False,288                }289                # FIXME: call GetSystemTimeAdjustment() to get the resolution290            else:291                info = None292            return (value, info)293        _monotonic.last = 0294        _monotonic.delta = 0295    has_monotonic = True296elif has_mach_absolute_time:297    def _monotonic(use_info):298        if _monotonic.factor is None:299            timebase = mach_timebase_info()300            _monotonic.factor = timebase[0] / timebase[1] * 1e-9301        value = mach_absolute_time() * _monotonic.factor302        if use_info:303            info = {304                'implementation': "mach_absolute_time()",305                'resolution': _monotonic.factor,306                'monotonic': True,307                'adjustable': False,308            }309        else:310            info = None311        return (value, info)312    _monotonic.factor = None313    has_monotonic = True314elif has_clock_gettime and CLOCK_HIGHRES is not None:315    def _monotonic(use_info):316        return _clock_gettime_info(use_info, CLOCK_HIGHRES)317    has_monotonic = True318elif has_clock_gettime and CLOCK_MONOTONIC is not None:319    def _monotonic(use_info):320        return _clock_gettime_info(use_info, CLOCK_MONOTONIC)321    has_monotonic = True322if has_monotonic:323    def monotonic():324        return _monotonic(False)[0]325def _perf_counter(use_info):326    info = None327    if _perf_counter.use_performance_counter:328        if _perf_counter.performance_frequency is None:329            value, info = _win_perf_counter(use_info)330            if value is not None:331                return (value, info)332    if _perf_counter.use_monotonic:333        # The monotonic clock is preferred over the system time334        try:335            return _monotonic(use_info)336        except (OSError, WindowsError):337            _perf_counter.use_monotonic = False338    return _time(use_info)339_perf_counter.use_performance_counter = (os.name == 'nt')340if _perf_counter.use_performance_counter:341    _perf_counter.performance_frequency = None342_perf_counter.use_monotonic = has_monotonic343def perf_counter():344    return _perf_counter(False)[0]345if os.name == 'nt':346    def _process_time(use_info):347        handle = GetCurrentProcess()348        process_times = GetProcessTimes(handle)349        value = (process_times[2] + process_times[3]) * 1e-7350        if use_info:351            info = {352                "implementation": "GetProcessTimes()",353                "resolution": 1e-7,354                "monotonic": True,355                "adjustable": False,356                # FIXME: call GetSystemTimeAdjustment() to get the resolution357            }358        else:359            info = None360        return (value, info)361else:362    import os363    try:364        import resource365    except ImportError:366        has_resource = False367    else:368        has_resource = True369    def _process_time(use_info):370        info = None371        if _process_time.clock_id is not None:372            try:373                return _clock_gettime_info(use_info, _process_time.clock_id)374            except OSError:375                _process_time.clock_id = None376        if _process_time.use_getrusage:377            try:378                usage = resource.getrusage(resource.RUSAGE_SELF)379                value = usage[0] + usage[1]380            except OSError:381                _process_time.use_getrusage = False382            else:383                if use_info:384                    info = {385                        "implementation": "getrusage(RUSAGE_SELF)",386                        "resolution": 1e-6,387                        "monotonic": True,388                        "adjustable": False,389                    }390                return (value, info)391        if _process_time.use_times:392            try:393                times = os.times()394                value = times[0] + times[1]395            except OSError:396                _process_time.use_getrusage = False397            else:398                if use_info:399                    try:400                        ticks_per_second = os.sysconf("SC_CLK_TCK")401                    except ValueError:402                        ticks_per_second = 60 # FIXME: get HZ constant403                    info = {404                        "implementation": "times()",405                        "resolution": 1.0 / ticks_per_second,406                        "monotonic": True,407                        "adjustable": False,408                    }409                return (value, info)410        return _libc_clock_info(use_info)411    if has_clock_gettime and CLOCK_PROCESS_CPUTIME_ID is not None:412        _process_time.clock_id = CLOCK_PROCESS_CPUTIME_ID413    elif has_clock_gettime and CLOCK_PROF is not None:414        _process_time.clock_id = CLOCK_PROF415    else:416        _process_time.clock_id = None417    _process_time.use_getrusage = has_resource418    # On OS/2, only the 5th field of os.times() is set, others are zeros419    _process_time.use_times = (hasattr(os, 'times') and os.name != 'os2')420def process_time():421    return _process_time(False)[0]422if os.name == "nt":423    def _time(use_info):424        value = GetSystemTimeAsFileTime() * 1e-7425        if use_info:426            info = {427                'implementation': 'GetSystemTimeAsFileTime',428                'resolution': 1e-7,429                'monotonic': False,430                # FIXME: call GetSystemTimeAdjustment() to get the resolution431                # and adjustable432            }433        else:434            info = None435        return (value, info)436else:437    def _time(use_info):438        info = None439        if has_clock_gettime and CLOCK_REALTIME is not None:440            try:441                return _clock_gettime_info(use_info, CLOCK_REALTIME)442            except OSError:443                # CLOCK_REALTIME is not supported (unlikely)444                pass445        if has_gettimeofday:446            try:447                tv = gettimeofday()448            except OSError:449                # gettimeofday() should not fail450                pass451            else:452                if use_info:453                    info = {454                        'monotonic': False,455                        "implementation": "gettimeofday()",456                        "resolution": 1e-6,457                        'monotonic': False,458                        'adjustable': True,459                    }460                value = tv.tv_sec + tv.tv_usec * 1e-6461                return (value, info)462        # FIXME: implement ftime()463        if has_ftime:464            if use_info:465                info = {466                    "implementation": "ftime()",467                    "resolution": 1e-3,468                    'monotonic': False,469                    'adjustable': True,470                }471            value = ftime()472        elif has_libc_time:473            if use_info:474                info = {475                    "implementation": "time()",476                    "resolution": 1.0,477                    'monotonic': False,478                    'adjustable': True,479                }480            value = float(_libc_time())481        else:482            if use_info:483                info = {484                    "implementation": "time.time()",485                    'monotonic': False,486                    'adjustable': True,487                }488                if os.name == "nt":489                    # On Windows, time.time() uses ftime()490                    info["resolution"] = 1e-3491                else:492                    # guess that time.time() uses gettimeofday()493                    info["resolution"] = 1e-6494            value = python_time.time()...

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