Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10589#discussion_r48815166
--- Diff: core/src/test/scala/org/apache/spark/Benchmark.scala ---
@@ -0,0 +1,102 @@
+/*
+ * 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.spark
+
+import scala.collection.mutable
+
+import org.apache.commons.lang3.SystemUtils
+import org.apache.spark.util.Utils
+
+/**
+ * Utility class to benchmark components. An example of how to use this is:
+ * val benchmark = new Benchmark("My Benchmark", valuesPerIteration)
+ * benchmark.addCase("V1", <function>")
+ * benchmark.addCase("V2", <function>")
+ * benchmark.run
+ * This will output the average time to run each function and the rate of
each function.
+ *
+ * The benchmark function takes one argument that is the iteration that's
being run
+ */
+class Benchmark(name: String, valuesPerIteration: Long, iters: Int = 5) {
+ val benchmarks = mutable.ArrayBuffer.empty[Benchmark.Case]
+
+ def addCase(name: String, f: Int => Unit): Unit = {
--- End diff --
same thing here, using multi parameter list makes the code look nicer
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