[
https://issues.apache.org/jira/browse/NUMBERS-156?focusedWorklogId=607925&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-607925
]
ASF GitHub Bot logged work on NUMBERS-156:
------------------------------------------
Author: ASF GitHub Bot
Created on: 07/Jun/21 14:56
Start Date: 07/Jun/21 14:56
Worklog Time Spent: 10m
Work Description: darkma773r commented on a change in pull request #92:
URL: https://github.com/apache/commons-numbers/pull/92#discussion_r646666596
##########
File path:
commons-numbers-examples/examples-jmh/src/main/java/org/apache/commons/numbers/examples/jmh/arrays/DoubleUtils.java
##########
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+package org.apache.commons.numbers.examples.jmh.arrays;
+
+import org.apache.commons.rng.UniformRandomProvider;
+
+/** Class containing utility methods for working with doubles.
+ */
+final class DoubleUtils {
+
+ /** No instantiation. */
+ private DoubleUtils() {}
+
+ /** Create a random double value with exponent in the range {@code
[minExp, maxExp]}.
+ * @param minExp minimum exponent value
+ * @param maxExp maximum exponent value
+ * @param rng random number generator
+ * @return random double
+ */
+ static double random(final int minExp, final int maxExp, final
UniformRandomProvider rng) {
+ // Create random doubles using random bits in the sign bit and the
mantissa.
+ final long mask = ((1L << 52) - 1) | 1L << 63;
+ final long bits = rng.nextLong() & mask;
+ // The exponent must be unsigned so + 1023 to the signed exponent
+ final long exp = rng.nextInt(Math.abs(maxExp - minExp) + 1) + minExp +
1023;
Review comment:
I just documented the requirement.
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Issue Time Tracking
-------------------
Worklog Id: (was: 607925)
Time Spent: 4h 50m (was: 4h 40m)
> SafeNorm 3D overload
> --------------------
>
> Key: NUMBERS-156
> URL: https://issues.apache.org/jira/browse/NUMBERS-156
> Project: Commons Numbers
> Issue Type: Improvement
> Reporter: Matt Juntunen
> Priority: Major
> Attachments: performance-all.png, performance-len-1-5.png,
> performance2-1-5.png, performance2-all.png, performance3-1-5.png,
> performance3-all.png, performance4-1-5.png, performance4-all.png,
> performance5-1-5.png, performance5-all.png
>
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> We should create an overload of {{SafeNorm.value}} that accepts 3 arguments
> to potentially improve performance for 3D vectors.
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