1 /*
2  * Copyright (C) 2022 The Android Open Source Project
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 android.libcore.regression;
18 
19 import android.perftests.utils.BenchmarkState;
20 import android.perftests.utils.PerfStatusReporter;
21 
22 import androidx.test.filters.LargeTest;
23 import androidx.test.runner.AndroidJUnit4;
24 
25 import org.junit.Rule;
26 import org.junit.Test;
27 import org.junit.runner.RunWith;
28 
29 @RunWith(AndroidJUnit4.class)
30 @LargeTest
31 public class ThreadLocalPerfTest {
32     @Rule public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
33 
34     private static final ThreadLocal<char[]> BUFFER =
35             new ThreadLocal<char[]>() {
36                 @Override
37                 protected char[] initialValue() {
38                     return new char[20];
39                 }
40             };
41 
42     @Test
timeThreadLocal_get()43     public void timeThreadLocal_get() {
44         BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
45         while (state.keepRunning()) {
46             BUFFER.get();
47         }
48     }
49 }
50