blob: c6c154c124482c9bf9c9e20950a9cca0fb22cb1d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
#!/usr/bin/env python3
import time
from typing import Callable, Optional
class Timer(object):
"""
A stopwatch to time how long something takes (walltime).
e.g.
with stopwatch.Timer() as t:
do_the_thing()
walltime = t()
print(f'That took {walltime} seconds.')
"""
def __init__(self) -> None:
self.start = 0.0
self.end = 0.0
def __enter__(self) -> Callable[[], float]:
"""Returns a functor that, when called, returns the walltime of the
operation in seconds.
"""
self.start = time.perf_counter()
self.end = 0.0
return lambda: self.end - self.start
def __exit__(self, *args) -> Optional[bool]:
self.end = time.perf_counter()
return None # don't suppress exceptions
|
