| """Simple tools for timing functions' execution, when IPython is not available. """ |
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|
| import timeit |
| import math |
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|
| _scales = [1e0, 1e3, 1e6, 1e9] |
| _units = ['s', 'ms', '\N{GREEK SMALL LETTER MU}s', 'ns'] |
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|
|
| def timed(func, setup="pass", limit=None): |
| """Adaptively measure execution time of a function. """ |
| timer = timeit.Timer(func, setup=setup) |
| repeat, number = 3, 1 |
|
|
| for i in range(1, 10): |
| if timer.timeit(number) >= 0.2: |
| break |
| elif limit is not None and number >= limit: |
| break |
| else: |
| number *= 10 |
|
|
| time = min(timer.repeat(repeat, number)) / number |
|
|
| if time > 0.0: |
| order = min(-int(math.floor(math.log10(time)) // 3), 3) |
| else: |
| order = 3 |
|
|
| return (number, time, time*_scales[order], _units[order]) |
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| |
|
|
| def __do_timings(): |
| import os |
| res = os.getenv('SYMPY_TIMINGS', '') |
| res = [x.strip() for x in res.split(',')] |
| return set(res) |
|
|
| _do_timings = __do_timings() |
| _timestack = None |
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|
|
| def _print_timestack(stack, level=1): |
| print('-'*level, '%.2f %s%s' % (stack[2], stack[0], stack[3])) |
| for s in stack[1]: |
| _print_timestack(s, level + 1) |
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|
|
| def timethis(name): |
| def decorator(func): |
| if name not in _do_timings: |
| return func |
|
|
| def wrapper(*args, **kwargs): |
| from time import time |
| global _timestack |
| oldtimestack = _timestack |
| _timestack = [func.func_name, [], 0, args] |
| t1 = time() |
| r = func(*args, **kwargs) |
| t2 = time() |
| _timestack[2] = t2 - t1 |
| if oldtimestack is not None: |
| oldtimestack[1].append(_timestack) |
| _timestack = oldtimestack |
| else: |
| _print_timestack(_timestack) |
| _timestack = None |
| return r |
| return wrapper |
| return decorator |
|
|
