def restart_timer(self):
# TODO 重启定时器，返回时间差
elapsed_time = self.stop_timer() # TODO 重启之前先暂停
self._time_started = time.time()
self._started = default_timer()
self._stopped = None
return elapsed_time
def elapsed_time(self):
if self._stopped is not None:
return self._stopped - self._started
return default_timer() - self._started
def restart_timer(self):
elapsed_time = self.stop_timer()
self._time_started = time.time()
self._started = default_timer()
self._stopped = None
return elapsed_time
def stop_timer(self):
if self._stopped is None:
self._stopped = default_timer()
return self._stopped - self._started
def __init__(self):
self._time_started = time.time()
self._started = default_timer()
self._stopped = None
# Python 3.3 and later implements PEP 418. Use the
# performance counter it provides which is monotonically
# increasing.
default_timer = time.perf_counter
timer_implementation = 'time.perf_counter()'
except AttributeError:
try:
# Next try our own bundled back port of the monotonic()
# function. Python 3.3 does on Windows use a different
# clock for the performance counter, but the standard
# monotonic clock should suit our requirements okay.
from newrelic.common._monotonic import monotonic as default_timer
default_timer()
timer_implementation = '_monotonic.monotonic()'
except (ImportError, NotImplementedError, OSError):
# If neither of the above, fallback to using the default
# timer from the timeit module. This will use the best
# resolution clock available on a particular platform,
# albeit that it isn't monotonically increasing.
import timeit
default_timer = timeit.default_timer
timer_implementation = 'timeit.default_timer()'
# A timer class which deals with remembering the start time based on
# wall clock time and duration based on a monotonic clock where
# available.
def elapsed_time(self):
# TODO 从过去的固定时间点起，经过的真实时间
if self._stopped is not None:
return self._stopped - self._started
return default_timer() - self._started
def stop_timer(self):
# TODO 暂停计时器，返回时间差
if self._stopped is None:
self._stopped = default_timer()
return self._stopped - self._started