/*
|
* 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"));
|
}
|
}
|
|
}
|
