# -*- coding: utf-8 -*-
# Copyright (C) 2017 Jan Blechta
#
# This file is part of DOLFIN (https://www.fenicsproject.org)
#
# SPDX-License-Identifier: LGPL-3.0-or-later
import functools
from dolfin import cpp
__all__ = ["Timer", "timed"]
[docs]class Timer(cpp.common.Timer):
"""A timer can be used for timing tasks. The basic usage is::
with Timer(\"Some costly operation\"):
costly_call_1()
costly_call_2()
or::
with Timer() as t:
costly_call_1()
costly_call_2()
print(\"Ellapsed time so far: %s\" % t.elapsed()[0])
The timer is started when entering context manager and timing
ends when exiting it. It is also possible to start and stop a
timer explicitly by::
t.start()
t.stop()
and retrieve timing data using::
t.elapsed()
Timings are stored globally (if task name is given) and
may be printed using functions ``timing``, ``timings``,
``list_timings``, ``dump_timings_to_xml``, e.g.::
list_timings(TimingClear.keep, [TimingType.wall, TimingType.user])
"""
def __enter__(self):
self.start()
return self
def __exit__(self, *args):
self.stop()
[docs]def timed(task):
"""Decorator for timing functions. Usage::
@timed(\"Do Foo\")
def do_foo(*args, **kwargs):
# Do something costly
pass
do_foo()
list_timings(TimingClear.keep, [TimingType.wall, TimingType.user])
t = timing(\"Do Foo\", TimingClear.clear)
print("Do foo wall time: %s" % t[1])
"""
def decorator(func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
with Timer(task):
return func(*args, **kwargs)
return wrapper
return decorator