197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes/* 297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * Copyright (C) 2010 Google Inc. 397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * 497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * you may not use this file except in compliance with the License. 697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * You may obtain a copy of the License at 797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * 897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * 1097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * Unless required by applicable law or agreed to in writing, software 1197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 1297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * See the License for the specific language governing permissions and 1497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * limitations under the License. 1597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes */ 1697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 1797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughespackage benchmarks.regression; 1897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 1997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport com.google.caliper.Param; 2097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport com.google.caliper.Runner; 2197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport com.google.caliper.SimpleBenchmark; 2297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport java.security.AccessController; 2397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport java.security.PrivilegedAction; 2497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 2597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughespublic class DoPrivilegedBenchmark extends SimpleBenchmark { 2697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public void timeDirect(int reps) throws Exception { 2797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 2897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes String lineSeparator = System.getProperty("line.separator"); 2997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 3097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 3197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 3297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public void timeFastAndSlow(int reps) throws Exception { 3397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 3497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes String lineSeparator; 3597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes if (System.getSecurityManager() == null) { 3697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes lineSeparator = System.getProperty("line.separator"); 3797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } else { 3897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() { 3997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public String run() { 4097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return System.getProperty("line.separator"); 4197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 4297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes }); 4397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 4497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 4597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 4697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 4797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public void timeNewAction(int reps) throws Exception { 4897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 4997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes String lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() { 5097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public String run() { 5197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return System.getProperty("line.separator"); 5297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes }); 5497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 5797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public void timeReusedAction(int reps) throws Exception { 5897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes final PrivilegedAction<String> action = new ReusableAction("line.separator"); 5997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 6097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes String lineSeparator = AccessController.doPrivileged(action); 6197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 6297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 6397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 6497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes private static final class ReusableAction implements PrivilegedAction<String> { 6597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes private final String propertyName; 6697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 6797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public ReusableAction(String propertyName) { 6897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes this.propertyName = propertyName; 6997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 7097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 7197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public String run() { 7297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return System.getProperty(propertyName); 7397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 7497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 7597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes} 76