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PEP 418: Fix clock_resolution.py script

This commit is contained in:
Victor Stinner 2014-09-15 13:31:42 +02:00
parent 5d40e85c43
commit c6eb2d4341
1 changed files with 12 additions and 14 deletions
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26
pep-0418/clock_resolution.py
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@ -5,8 +5,8 @@ try:
except ImportError: except ImportError:
from time import time as timeout_time from time import time as timeout_time
def compute_precision(func): def compute_resolution(func):
precision = None resolution = None
points = 0 points = 0
timeout = timeout_time() + 1.0 timeout = timeout_time() + 1.0
previous = func() previous = func()
@ -21,13 +21,13 @@ def compute_precision(func):
dt = t2 - previous dt = t2 - previous
if dt <= 0.0: if dt <= 0.0:
continue continue
if precision is not None: if resolution is not None:
precision = min(precision, dt) resolution = min(resolution, dt)
else: else:
precision = dt resolution = dt
points += 1 points += 1
previous = func() previous = func()
return precision return resolution
def format_duration(dt): def format_duration(dt):
if dt >= 1e-3: if dt >= 1e-3:
@ -39,8 +39,8 @@ def format_duration(dt):
def test_clock(name, func): def test_clock(name, func):
print("%s:" % name) print("%s:" % name)
precision = compute_precision(func) resolution = compute_resolution(func)
print("- precision in Python: %s" % format_duration(precision)) print("- resolution in Python: %s" % format_duration(resolution))
clocks = ['clock', 'perf_counter', 'process_time'] clocks = ['clock', 'perf_counter', 'process_time']
@ -51,10 +51,8 @@ for name in clocks:
func = getattr(time, name) func = getattr(time, name)
test_clock("%s()" % name, func) test_clock("%s()" % name, func)
info = time.get_clock_info(name) info = time.get_clock_info(name)
if 'precision' in info: print("- implementation: %s" % info.implementation)
print("- announced precision: %s" % format_duration(info['precision'])) print("- resolution: %s" % format_duration(info.resolution))
print("- implementation: %s" % info['implementation'])
print("- resolution: %s" % format_duration(info['resolution']))
clock_ids = [name for name in dir(time) if name.startswith("CLOCK_")] clock_ids = [name for name in dir(time) if name.startswith("CLOCK_")]
clock_ids.sort() clock_ids.sort()
@ -69,6 +67,6 @@ for clock_id_text in clock_ids:
print("%s failed: %s" % (name, err)) print("%s failed: %s" % (name, err))
continue continue
test_clock(name, gettime) test_clock(name, gettime)
precision = time.clock_getres(clock_id) resolution = time.clock_getres(clock_id)
print("- announced precision: %s" % format_duration(precision)) print("- announced resolution: %s" % format_duration(resolution))