Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/20937#discussion_r184851052 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/json/JsonBenchmarks.scala --- @@ -0,0 +1,179 @@ +/* + * 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.sql.execution.datasources.json + +import java.io.File + +import org.apache.spark.SparkConf +import org.apache.spark.sql.SparkSession +import org.apache.spark.sql.types.{LongType, StringType, StructType} +import org.apache.spark.util.{Benchmark, Utils} + +/** + * Benchmark to measure JSON read/write performance. + * To run this: + * spark-submit --class <this class> --jars <spark sql test jar> + */ +object JSONBenchmarks { + val conf = new SparkConf() + + val spark = SparkSession.builder + .master("local[1]") + .appName("benchmark-json-datasource") + .config(conf) + .getOrCreate() + import spark.implicits._ + + def withTempPath(f: File => Unit): Unit = { + val path = Utils.createTempDir() + path.delete() + try f(path) finally Utils.deleteRecursively(path) + } + + + def schemaInferring(rowsNum: Int): Unit = { + val benchmark = new Benchmark("JSON schema inferring", rowsNum) + + withTempPath { path => + // scalastyle:off --- End diff -- ``` // scalastyle:off println ... // scalastyle:on println ```
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