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368 lines
10 KiB
368 lines
10 KiB
5 years ago
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from __future__ import print_function, division
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from nose.plugins.skip import SkipTest
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from contextlib import contextmanager
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import sys
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from time import sleep, time
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from tqdm import trange
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from tqdm import tqdm
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from tests_tqdm import with_setup, pretest, posttest, StringIO, closing, _range
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# Use relative/cpu timer to have reliable timings when there is a sudden load
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try:
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from time import process_time
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except ImportError:
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from time import clock
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process_time = clock
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def get_relative_time(prevtime=0):
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return process_time() - prevtime
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def cpu_sleep(t):
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"""Sleep the given amount of cpu time"""
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start = process_time()
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while (process_time() - start) < t:
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pass
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def checkCpuTime(sleeptime=0.2):
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"""Check if cpu time works correctly"""
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if checkCpuTime.passed:
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return True
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# First test that sleeping does not consume cputime
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start1 = process_time()
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sleep(sleeptime)
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t1 = process_time() - start1
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# secondly check by comparing to cpusleep (where we actually do something)
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start2 = process_time()
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cpu_sleep(sleeptime)
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t2 = process_time() - start2
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if abs(t1) < 0.0001 and (t1 < t2 / 10):
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return True
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raise SkipTest
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checkCpuTime.passed = False
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@contextmanager
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def relative_timer():
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start = process_time()
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def elapser():
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return process_time() - start
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yield lambda: elapser()
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spent = process_time() - start
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def elapser(): # NOQA
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return spent
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def retry_on_except(n=3):
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def wrapper(fn):
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def test_inner():
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for i in range(1, n + 1):
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try:
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checkCpuTime()
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fn()
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except SkipTest:
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if i >= n:
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raise
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else:
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return
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test_inner.__doc__ = fn.__doc__
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return test_inner
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return wrapper
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class MockIO(StringIO):
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"""Wraps StringIO to mock a file with no I/O"""
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def write(self, data):
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return
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def simple_progress(iterable=None, total=None, file=sys.stdout, desc='',
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leave=False, miniters=1, mininterval=0.1, width=60):
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"""Simple progress bar reproducing tqdm's major features"""
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n = [0] # use a closure
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start_t = [time()]
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last_n = [0]
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last_t = [0]
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if iterable is not None:
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total = len(iterable)
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def format_interval(t):
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mins, s = divmod(int(t), 60)
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h, m = divmod(mins, 60)
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if h:
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return '{0:d}:{1:02d}:{2:02d}'.format(h, m, s)
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else:
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return '{0:02d}:{1:02d}'.format(m, s)
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def update_and_print(i=1):
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n[0] += i
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if (n[0] - last_n[0]) >= miniters:
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last_n[0] = n[0]
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if (time() - last_t[0]) >= mininterval:
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last_t[0] = time() # last_t[0] == current time
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spent = last_t[0] - start_t[0]
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spent_fmt = format_interval(spent)
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rate = n[0] / spent if spent > 0 else 0
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if 0.0 < rate < 1.0:
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rate_fmt = "%.2fs/it" % (1.0 / rate)
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else:
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rate_fmt = "%.2fit/s" % rate
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frac = n[0] / total
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percentage = int(frac * 100)
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eta = (total - n[0]) / rate if rate > 0 else 0
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eta_fmt = format_interval(eta)
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# bar = "#" * int(frac * width)
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barfill = " " * int((1.0 - frac) * width)
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bar_length, frac_bar_length = divmod(int(frac * width * 10), 10)
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bar = '#' * bar_length
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frac_bar = chr(48 + frac_bar_length) if frac_bar_length \
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else ' '
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file.write("\r%s %i%%|%s%s%s| %i/%i [%s<%s, %s]" %
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(desc, percentage, bar, frac_bar, barfill, n[0],
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total, spent_fmt, eta_fmt, rate_fmt))
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if n[0] == total and leave:
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file.write("\n")
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file.flush()
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def update_and_yield():
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for elt in iterable:
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yield elt
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update_and_print()
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update_and_print(0)
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if iterable is not None:
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return update_and_yield()
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else:
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return update_and_print
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def assert_performance(thresh, name_left, time_left, name_right, time_right):
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"""raises if time_left > thresh * time_right"""
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if time_left > thresh * time_right:
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raise ValueError(
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('{name[0]}: {time[0]:f}, '
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'{name[1]}: {time[1]:f}, '
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'ratio {ratio:f} > {thresh:f}').format(
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name=(name_left, name_right),
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time=(time_left, time_right),
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ratio=time_left / time_right, thresh=thresh))
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_iter_overhead():
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"""Test overhead of iteration based tqdm"""
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total = int(1e6)
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with closing(MockIO()) as our_file:
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a = 0
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with trange(total, file=our_file) as t:
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with relative_timer() as time_tqdm:
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for i in t:
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a += i
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assert a == (total * total - total) / 2.0
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a = 0
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with relative_timer() as time_bench:
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for i in _range(total):
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a += i
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our_file.write(a)
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assert_performance(6, 'trange', time_tqdm(), 'range', time_bench())
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_manual_overhead():
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"""Test overhead of manual tqdm"""
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total = int(1e6)
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with closing(MockIO()) as our_file:
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with tqdm(total=total * 10, file=our_file, leave=True) as t:
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a = 0
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with relative_timer() as time_tqdm:
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for i in _range(total):
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a += i
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t.update(10)
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a = 0
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with relative_timer() as time_bench:
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for i in _range(total):
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a += i
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our_file.write(a)
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assert_performance(6, 'tqdm', time_tqdm(), 'range', time_bench())
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def worker(total, blocking=True):
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def incr_bar(x):
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with closing(StringIO()) as our_file:
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for _ in trange(
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total, file=our_file,
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lock_args=None if blocking else (False,),
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miniters=1, mininterval=0, maxinterval=0):
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pass
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return x + 1
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return incr_bar
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_lock_args():
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"""Test overhead of nonblocking threads"""
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try:
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from concurrent.futures import ThreadPoolExecutor
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from threading import RLock
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except ImportError:
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raise SkipTest
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import sys
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total = 8
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subtotal = 1000
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tqdm.set_lock(RLock())
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with ThreadPoolExecutor(total) as pool:
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sys.stderr.write('block ... ')
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sys.stderr.flush()
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with relative_timer() as time_tqdm:
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res = list(pool.map(worker(subtotal, True), range(total)))
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assert sum(res) == sum(range(total)) + total
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sys.stderr.write('noblock ... ')
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sys.stderr.flush()
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with relative_timer() as time_noblock:
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res = list(pool.map(worker(subtotal, False), range(total)))
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assert sum(res) == sum(range(total)) + total
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assert_performance(0.2, 'noblock', time_noblock(), 'tqdm', time_tqdm())
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_iter_overhead_hard():
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"""Test overhead of iteration based tqdm (hard)"""
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total = int(1e5)
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with closing(MockIO()) as our_file:
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a = 0
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with trange(total, file=our_file, leave=True, miniters=1,
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mininterval=0, maxinterval=0) as t:
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with relative_timer() as time_tqdm:
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for i in t:
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a += i
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assert a == (total * total - total) / 2.0
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a = 0
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with relative_timer() as time_bench:
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for i in _range(total):
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a += i
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our_file.write(("%i" % a) * 40)
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assert_performance(85, 'trange', time_tqdm(), 'range', time_bench())
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_manual_overhead_hard():
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"""Test overhead of manual tqdm (hard)"""
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total = int(1e5)
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with closing(MockIO()) as our_file:
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t = tqdm(total=total * 10, file=our_file, leave=True, miniters=1,
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mininterval=0, maxinterval=0)
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a = 0
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with relative_timer() as time_tqdm:
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for i in _range(total):
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a += i
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t.update(10)
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a = 0
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with relative_timer() as time_bench:
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for i in _range(total):
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a += i
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our_file.write(("%i" % a) * 40)
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assert_performance(85, 'tqdm', time_tqdm(), 'range', time_bench())
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_iter_overhead_simplebar_hard():
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"""Test overhead of iteration based tqdm vs simple progress bar (hard)"""
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total = int(1e4)
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with closing(MockIO()) as our_file:
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a = 0
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with trange(total, file=our_file, leave=True, miniters=1,
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mininterval=0, maxinterval=0) as t:
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with relative_timer() as time_tqdm:
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for i in t:
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a += i
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assert a == (total * total - total) / 2.0
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a = 0
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s = simple_progress(_range(total), file=our_file, leave=True,
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miniters=1, mininterval=0)
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with relative_timer() as time_bench:
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for i in s:
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a += i
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assert_performance(
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5, 'trange', time_tqdm(), 'simple_progress', time_bench())
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@with_setup(pretest, posttest)
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@retry_on_except()
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def test_manual_overhead_simplebar_hard():
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"""Test overhead of manual tqdm vs simple progress bar (hard)"""
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total = int(1e4)
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with closing(MockIO()) as our_file:
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t = tqdm(total=total * 10, file=our_file, leave=True, miniters=1,
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mininterval=0, maxinterval=0)
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a = 0
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with relative_timer() as time_tqdm:
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for i in _range(total):
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a += i
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t.update(10)
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simplebar_update = simple_progress(
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total=total * 10, file=our_file, leave=True, miniters=1,
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mininterval=0)
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a = 0
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with relative_timer() as time_bench:
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for i in _range(total):
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a += i
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simplebar_update(10)
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assert_performance(
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5, 'tqdm', time_tqdm(), 'simple_progress', time_bench())
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