| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed 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 benchmarks; |
| |
| import java.security.AccessController; |
| |
| import sun.security.action.GetPropertyAction; |
| |
| /** |
| * Compares performance of accessing system properties via |
| * legacy security code |
| * {@code AccessController.doPrivileged(new GetPropertyAction(key[, default]))} |
| * vs. direct invocation of {@code System.getProperty(key[, default])}. |
| * |
| * As of 2018-07, libcore carries some patches to perform such short-circuiting, |
| * so it's interesting to know how much better it performs. |
| */ |
| public class GetSystemPropertyBenchmark { |
| |
| public void timeSystem_getProperty_default(int reps) { |
| for (int i = 0; i < reps; i++) { |
| System.getProperty("user.language", "en"); |
| } |
| } |
| |
| public void timeSystem_getProperty(int reps) { |
| for (int i = 0; i < reps; i++) { |
| System.getProperty("user.region"); |
| } |
| } |
| |
| public void timeAccessController_getPropertyAction(int reps) { |
| for (int i = 0; i < reps; i++) { |
| AccessController.doPrivileged( |
| new GetPropertyAction("user.language", "en")); |
| } |
| } |
| |
| public void timeAccessController_getPropertyAction_default(int reps) { |
| for (int i = 0; i < reps; i++) { |
| AccessController.doPrivileged( |
| new GetPropertyAction("user.region")); |
| } |
| } |
| |
| } |