Github user kinow commented on a diff in the pull request:
https://github.com/apache/commons-lang/pull/311#discussion_r164283366
--- Diff: src/main/java/org/apache/commons/lang3/time/TimingRecordNode.java
---
@@ -0,0 +1,222 @@
+/*
+ * 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.lang3.time;
+
+import java.util.LinkedList;
+import java.util.List;
+import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * The tree node to track time and children.
+ * The {@code StopWatch} class is used for timings
+ */
+public class TimingRecordNode {
+
+ /**
+ * The format String for creating paths.
+ */
+ private static final String PATH_FMT = "%s/%s";
+
+ /**
+ * This nodes parent's path.
+ */
+ private String parentTimingPath;
+
+ /**
+ * The name of this node.
+ */
+ private String timingName;
+
+ /**
+ * The tags associated with this timing.
+ */
+ private String[] tags;
+
+ /**
+ * The child nodes of this node.
+ */
+ private List<TimingRecordNode> children = new LinkedList<>();
--- End diff --
Would it make much difference if we used an `ArrayList` here? We seem to
`#add` only in `createChild()`, and not sure if we are using any head/tail
operation, nor inserting with indexes. So maybe having an `ArrayList` would
give us the same functionality for less memory?
---
