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python 函数执行时间工具类
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from functools import wraps | |
import cProfile | |
from line_profiler import LineProfiler | |
import time | |
def func_time(f): | |
""" | |
简单记录执行时间 | |
:param f: | |
:return: | |
""" | |
@wraps(f) | |
def wrapper(*args, **kwargs): | |
start = time.time() | |
result = f(*args, **kwargs) | |
end = time.time() | |
print f.__name__, 'took', end - start, 'seconds' | |
return result | |
return wrapper | |
def func_cprofile(f): | |
""" | |
内建分析器 | |
194 function calls (189 primitive calls) in 0.000 seconds | |
Ordered by: standard name | |
ncalls tottime percall cumtime percall filename:lineno(function) | |
1 0.000 0.000 0.000 0.000 <string>:1(<module>) | |
1 0.000 0.000 0.000 0.000 re.py:188(compile) | |
1 0.000 0.000 0.000 0.000 re.py:226(_compile) | |
1. 第一行告诉我们一共有194个函数被调用,其中189个是原生(primitive)调用,表明这些调用不涉及递归。 | |
2. ncalls表示函数的调用次数,如果这一列有两个数值,表示有递归调用,第一个是总调用次数,第二个是原生调用次数。 | |
3. tottime是函数内部消耗的总时间(不包括调用其他函数的时间)。 | |
4. percall是tottime除以ncalls,表示每次调用平均消耗时间。 | |
5. cumtime是之前所有子函数消耗时间的累积和。 | |
6. percall是cumtime除以原生调用的数量,表示该函数调用时,每个原生调用的平均消耗时间。 | |
7. filename:lineno(function)为被分析函数所在文件名、行号、函数名。 | |
""" | |
@wraps(f) | |
def wrapper(*args, **kwargs): | |
profile = cProfile.Profile() | |
try: | |
profile.enable() | |
result = f(*args, **kwargs) | |
profile.disable() | |
return result | |
finally: | |
profile.print_stats(sort='time') | |
return wrapper | |
try: | |
from line_profiler import LineProfiler | |
def func_line_time(follow=[]): | |
""" | |
每行代码执行时间详细报告 | |
:param follow: 内部调用方法 | |
:return: | |
Timer unit: 1e-06 s | |
Timer unit: 1e-06 s | |
Total time: 14.4183 s | |
File: /xx/test.py | |
Function: test at line 41 | |
Line # Hits Time Per Hit % Time Line Contents | |
============================================================== | |
41 @func_line_time() | |
42 def test(): | |
43 10000001 4031936.0 0.4 28.0 for x in range(10000000): | |
44 10000000 10386347.0 1.0 72.0 print x | |
Total Time:测试代码的总运行时间 | |
Line:代码行号 | |
Hits:表示每行代码运行的次数 | |
Time:每行代码运行的总时间 | |
Per Hits:每行代码运行一次的时间 | |
% Time:每行代码运行时间的百分比 | |
""" | |
def decorate(func): | |
@wraps(func) | |
def profiled_func(*args, **kwargs): | |
try: | |
profiler = LineProfiler() | |
profiler.add_function(func) | |
for f in follow: | |
profiler.add_function(f) | |
profiler.enable_by_count() | |
return func(*args, **kwargs) | |
finally: | |
profiler.print_stats() | |
return profiled_func | |
return decorate | |
except ImportError: | |
def func_line_time(follow=[]): | |
"Helpful if you accidentally leave in production!" | |
def decorate(func): | |
@wraps(func) | |
def nothing(*args, **kwargs): | |
return func(*args, **kwargs) | |
return nothing | |
return decorate |
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