sdk/sources/android-25/benchmarks/regression/RandomBenchmark.java

   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 java.security.SecureRandom;
  20 import java.util.Random;
  21
  22 public class RandomBenchmark {
  23     public void timeNewRandom(int reps) throws Exception {
  24         for (int i = 0; i < reps; ++i) {
  25             Random rng = new Random();
  26             rng.nextInt();
  27         }
  28     }
  29
  30     public void timeReusedRandom(int reps) throws Exception {
  31         Random rng = new Random();
  32         for (int i = 0; i < reps; ++i) {
  33             rng.nextInt();
  34         }
  35     }
  36
  37     public void timeReusedSecureRandom(int reps) throws Exception {
  38         SecureRandom rng = new SecureRandom();
  39         for (int i = 0; i < reps; ++i) {
  40             rng.nextInt();
  41         }
  42     }
  43
  44     public void timeNewSecureRandom(int reps) throws Exception {
  45         for (int i = 0; i < reps; ++i) {
  46             SecureRandom rng = new SecureRandom();
  47             rng.nextInt();
  48         }
  49     }
  50 }