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Issue #14428: Use the new time.perf_counter() and time.process_time() functions

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* Replace "time.clock on windows, or time.time" with time.perf_counter()
 * profile module: only use time.process_time() instead of trying different
   functions providing the process time
 * timeit module: use time.perf_counter() by default, time.time() and
   time.clock() can still be used using --time and --clock options
 * pybench program: use time.perf_counter() by default, add support for
   the new time.process_time() and time.perf_counter() functions, but stay
   backward compatible. Use also time.get_clock_info() to display information
   of the timer.
This commit is contained in:
Victor Stinner 2012-04-29 03:01:20 +02:00
parent 47620a6611
commit fe98e2fc83
7 changed files with 32 additions and 55 deletions
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36
Lib/profile.py
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@ -83,26 +83,6 @@ def runctx(statement, globals, locals, filename=None, sort=-1):
else:
return prof.print_stats(sort)
if hasattr(os, "times"):
def _get_time_times(timer=os.times):
t = timer()
return t[0] + t[1]
# Using getrusage(3) is better than clock(3) if available:
# on some systems (e.g. FreeBSD), getrusage has a higher resolution
# Furthermore, on a POSIX system, returns microseconds, which
# wrap around after 36min.
_has_res = 0
try:
import resource
resgetrusage = lambda: resource.getrusage(resource.RUSAGE_SELF)
def _get_time_resource(timer=resgetrusage):
t = timer()
return t[0] + t[1]
_has_res = 1
except ImportError:
pass
class Profile:
"""Profiler class.
@ -155,20 +135,8 @@ class Profile:
self.bias = bias # Materialize in local dict for lookup speed.
if not timer:
if _has_res:
self.timer = resgetrusage
self.dispatcher = self.trace_dispatch
self.get_time = _get_time_resource
elif hasattr(time, 'clock'):
self.timer = self.get_time = time.clock
self.dispatcher = self.trace_dispatch_i
elif hasattr(os, 'times'):
self.timer = os.times
self.dispatcher = self.trace_dispatch
self.get_time = _get_time_times
else:
self.timer = self.get_time = time.time
self.dispatcher = self.trace_dispatch_i
self.timer = self.get_time = time.process_time
self.dispatcher = self.trace_dispatch_i
else:
self.timer = timer
t = self.timer() # test out timer function