1 /* 2 * Copyright (C) 2010 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package benchmarks.regression; 18 19 import com.google.caliper.Param; 20 import com.google.caliper.Runner; 21 import com.google.caliper.SimpleBenchmark; 22 import java.security.AccessController; 23 import java.security.PrivilegedAction; 24 25 public class DoPrivilegedBenchmark extends SimpleBenchmark { timeDirect(int reps)26 public void timeDirect(int reps) throws Exception { 27 for (int i = 0; i < reps; ++i) { 28 String lineSeparator = System.getProperty("line.separator"); 29 } 30 } 31 timeFastAndSlow(int reps)32 public void timeFastAndSlow(int reps) throws Exception { 33 for (int i = 0; i < reps; ++i) { 34 String lineSeparator; 35 if (System.getSecurityManager() == null) { 36 lineSeparator = System.getProperty("line.separator"); 37 } else { 38 lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() { 39 public String run() { 40 return System.getProperty("line.separator"); 41 } 42 }); 43 } 44 } 45 } 46 timeNewAction(int reps)47 public void timeNewAction(int reps) throws Exception { 48 for (int i = 0; i < reps; ++i) { 49 String lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() { 50 public String run() { 51 return System.getProperty("line.separator"); 52 } 53 }); 54 } 55 } 56 timeReusedAction(int reps)57 public void timeReusedAction(int reps) throws Exception { 58 final PrivilegedAction<String> action = new ReusableAction("line.separator"); 59 for (int i = 0; i < reps; ++i) { 60 String lineSeparator = AccessController.doPrivileged(action); 61 } 62 } 63 64 private static final class ReusableAction implements PrivilegedAction<String> { 65 private final String propertyName; 66 ReusableAction(String propertyName)67 public ReusableAction(String propertyName) { 68 this.propertyName = propertyName; 69 } 70 run()71 public String run() { 72 return System.getProperty(propertyName); 73 } 74 } 75 } 76