Files
catalyst/zipline/utils/math_utils.py
T
Eddie Hebert bf1fc42acc BUG: Fix time spent checking equality of floating point numbers.
The use of np.allclose introduced a severe performance penalty,
caused by the creation of two `np.array`s for each check.

Instead create and use a similar check which maintains tolerance
to floating point rounding, but operates only on scalars.
2013-04-16 13:09:26 -04:00

21 lines
708 B
Python

#
# Copyright 2013 Quantopian, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import math
def tolerant_equals(a, b, atol=10e-7, rtol=10e-7):
return math.fabs(a - b) <= (atol + rtol * math.fabs(b))