001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017 018 package org.apache.logging.log4j.perf.jmh; 019 020 import java.util.UUID; 021 022 import org.apache.logging.log4j.core.util.UuidUtil; 023 import org.openjdk.jmh.annotations.GenerateMicroBenchmark; 024 025 /** 026 * Compares random UUID generation with time-based UUID generation. 027 */ 028 // ============================== HOW TO RUN THIS TEST: ==================================== 029 // 030 // java -jar log4j-perf/target/microbenchmarks.jar ".*UuidGeneratorBenchmark.*" -f 1 -wi 5 -i 5 031 // 032 // Usage help: 033 // java -jar log4j-perf/target/microbenchmarks.jar -help 034 // 035 public class UuidGeneratorBenchmark { 036 037 @GenerateMicroBenchmark 038 public UUID base() { 039 return null; 040 } 041 042 @GenerateMicroBenchmark 043 public UUID randomUUID() { 044 return UUID.randomUUID(); 045 } 046 047 @GenerateMicroBenchmark 048 public UUID timeBasedUUID() { 049 return UuidUtil.getTimeBasedUuid(); 050 } 051 }