1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not 5 * use this file except in compliance with the License. You may obtain a copy of 6 * 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, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations under 14 * the License. 15 */ 16 17 package android.os; 18 19 import android.content.Context; 20 import android.content.SharedPreferences; 21 import android.perftests.utils.BenchmarkState; 22 import android.perftests.utils.PerfStatusReporter; 23 import android.support.test.InstrumentationRegistry; 24 import android.support.test.filters.LargeTest; 25 import android.support.test.runner.AndroidJUnit4; 26 27 import org.junit.Rule; 28 import org.junit.Test; 29 import org.junit.runner.RunWith; 30 31 @RunWith(AndroidJUnit4.class) 32 @LargeTest 33 public class SharedPreferencesTest { 34 @Rule 35 public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter(); 36 37 @Test 38 public void timeCachedGetSharedPreferences() { 39 final BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); 40 final Context context = InstrumentationRegistry.getTargetContext(); 41 // Do the real work once as we're only interested in cache-hit performance 42 SharedPreferences prefs = context.getSharedPreferences("test", Context.MODE_PRIVATE); 43 while (state.keepRunning()) { 44 prefs = context.getSharedPreferences("test", Context.MODE_PRIVATE); 45 } 46 } 47 } 48
