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Commit 668e1749 authored by Yeabkal Wubshit's avatar Yeabkal Wubshit
Browse files

Add ViewConfigurationPerfTest 

Created two simple benchmark tests to measure performance of
ViewConfiguration#get.

Bug: 299587011
Test: atest ViewConfigurationPerfTest

Change-Id: If502a4acb6bc6080af134675e610a76df59c538a
parent c05944b3

apct-tests/perftests/core/src/android/view/ViewConfigurationPerfTest.java

0 → 100644
+61 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2023 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 android.view;



import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;



import android.content.Context;



import androidx.benchmark.BenchmarkState;

import androidx.benchmark.junit4.BenchmarkRule;

import androidx.test.filters.SmallTest;



import org.junit.Rule;

import org.junit.Test;



@SmallTest

public class ViewConfigurationPerfTest {

    @Rule

    public final BenchmarkRule mBenchmarkRule = new BenchmarkRule();



    private final Context mContext = getInstrumentation().getTargetContext();



    @Test

    public void testGet_newViewConfiguration() {

        final BenchmarkState state = mBenchmarkRule.getState();



        while (state.keepRunning()) {

            state.pauseTiming();

            // Reset cache so that `ViewConfiguration#get` creates a new instance.

            ViewConfiguration.resetCacheForTesting();

            state.resumeTiming();



            ViewConfiguration.get(mContext);

        }

    }



    @Test

    public void testGet_cachedViewConfiguration() {

        final BenchmarkState state = mBenchmarkRule.getState();

        // Do `get` once to make sure there's something cached.

        ViewConfiguration.get(mContext);



        while (state.keepRunning()) {

            ViewConfiguration.get(mContext);

        }

    }

}

core/java/android/view/ViewConfiguration.java

+14 −0
Original line number Diff line number Diff line
@@ -40,6 +40,8 @@ import android.util.SparseArray; 
import android.util.TypedValue;

import android.view.flags.Flags;



import com.android.internal.annotations.VisibleForTesting;



/**

 * Contains methods to standard constants used in the UI for timeouts, sizes, and distances.

 */
@@ -602,6 +604,18 @@ public class ViewConfiguration { 
        return configuration;

    }



    /**

     * Removes cached ViewConfiguration instances, so that we can ensure `get` constructs a new

     * ViewConfiguration instance. This is useful for testing the behavior and performance of

     * creating ViewConfiguration the first time.

     *

     * @hide

     */

    @VisibleForTesting

    public static void resetCacheForTesting() {

        sConfigurations.clear();

    }



    /**

     * @return The width of the horizontal scrollbar and the height of the vertical

     *         scrollbar in dips