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# DExTer : Debugging Experience Tester
# ~~~~~~ ~ ~~ ~ ~~
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
"""RAII-style timer class to be used with a 'with' statement to get wall clock
time for the contained code.
"""
import sys
import time
def _indent(indent):
return '| ' * indent
class Timer(object):
fn = sys.stdout.write
display = False
indent = 0
def __init__(self, name=None):
self.name = name
self.start = self.now
def __enter__(self):
Timer.indent += 1
if Timer.display and self.name:
indent = _indent(Timer.indent - 1) + ' _'
Timer.fn('{}\n'.format(_indent(Timer.indent - 1)))
Timer.fn('{} start {}\n'.format(indent, self.name))
return self
def __exit__(self, *args):
if Timer.display and self.name:
indent = _indent(Timer.indent - 1) + '|_'
Timer.fn('{} {} time taken: {:0.1f}s\n'.format(
indent, self.name, self.elapsed))
Timer.fn('{}\n'.format(_indent(Timer.indent - 1)))
Timer.indent -= 1
@property
def elapsed(self):
return self.now - self.start
@property
def now(self):
return time.time()
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