| /* |
| * 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.druid.benchmark; |
| |
| import com.google.common.base.Function; |
| import org.apache.druid.java.util.common.parsers.TimestampParser; |
| import org.joda.time.DateTime; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.BenchmarkMode; |
| import org.openjdk.jmh.annotations.Mode; |
| import org.openjdk.jmh.annotations.OutputTimeUnit; |
| import org.openjdk.jmh.annotations.Param; |
| import org.openjdk.jmh.annotations.Scope; |
| import org.openjdk.jmh.annotations.Setup; |
| import org.openjdk.jmh.annotations.State; |
| import org.openjdk.jmh.infra.Blackhole; |
| import org.openjdk.jmh.runner.Runner; |
| import org.openjdk.jmh.runner.RunnerException; |
| import org.openjdk.jmh.runner.options.Options; |
| import org.openjdk.jmh.runner.options.OptionsBuilder; |
| |
| import java.text.SimpleDateFormat; |
| import java.util.Date; |
| import java.util.Locale; |
| import java.util.concurrent.TimeUnit; |
| |
| @State(Scope.Benchmark) |
| public class TimeParseBenchmark |
| { |
| // 1 million rows |
| int numRows = 1000000; |
| |
| // Number of batches of same times |
| @Param({"10000", "100000", "500000", "1000000"}) |
| int numBatches; |
| |
| static final String DATA_FORMAT = "MM/dd/yyyy HH:mm:ss Z"; |
| |
| static Function<String, DateTime> timeFn = TimestampParser.createTimestampParser(DATA_FORMAT); |
| |
| private String[] rows; |
| |
| @Setup |
| public void setup() |
| { |
| SimpleDateFormat format = new SimpleDateFormat(DATA_FORMAT, Locale.ENGLISH); |
| long start = System.currentTimeMillis(); |
| int rowsPerBatch = numRows / numBatches; |
| int numRowInBatch = 0; |
| rows = new String[numRows]; |
| for (int i = 0; i < numRows; ++i) { |
| if (numRowInBatch >= rowsPerBatch) { |
| numRowInBatch = 0; |
| start += 5000; // new batch, add 5 seconds |
| } |
| rows[i] = format.format(new Date(start)); |
| numRowInBatch++; |
| } |
| } |
| |
| @Benchmark |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| public void parseNoContext(Blackhole blackhole) |
| { |
| for (String row : rows) { |
| blackhole.consume(timeFn.apply(row).getMillis()); |
| } |
| } |
| |
| @Benchmark |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| public void parseWithContext(Blackhole blackhole) |
| { |
| String lastTimeString = null; |
| long lastTime = 0L; |
| for (String row : rows) { |
| if (!row.equals(lastTimeString)) { |
| lastTimeString = row; |
| lastTime = timeFn.apply(row).getMillis(); |
| } |
| blackhole.consume(lastTime); |
| } |
| } |
| |
| public static void main(String[] args) throws RunnerException |
| { |
| Options opt = new OptionsBuilder() |
| .include(TimeParseBenchmark.class.getSimpleName()) |
| .warmupIterations(1) |
| .measurementIterations(10) |
| .forks(1) |
| .build(); |
| |
| new Runner(opt).run(); |
| } |
| } |