1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache license, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the license for the specific language governing permissions and 15 * limitations under the license. 16 */ 17 18 package org.apache.logging.log4j.perf.jmh; 19 20 import java.util.UUID; 21 22 import org.apache.logging.log4j.core.util.UuidUtil; 23 import org.openjdk.jmh.annotations.GenerateMicroBenchmark; 24 25 /** 26 * Compares random UUID generation with time-based UUID generation. 27 */ 28 // ============================== HOW TO RUN THIS TEST: ==================================== 29 // 30 // java -jar log4j-perf/target/microbenchmarks.jar ".*UuidGeneratorBenchmark.*" -f 1 -wi 5 -i 5 31 // 32 // Usage help: 33 // java -jar log4j-perf/target/microbenchmarks.jar -help 34 // 35 public class UuidGeneratorBenchmark { 36 37 @GenerateMicroBenchmark 38 public UUID base() { 39 return null; 40 } 41 42 @GenerateMicroBenchmark 43 public UUID randomUUID() { 44 return UUID.randomUUID(); 45 } 46 47 @GenerateMicroBenchmark 48 public UUID timeBasedUUID() { 49 return UuidUtil.getTimeBasedUuid(); 50 } 51 }