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author | Narayan Kamath <narayan@google.com> | 2013-11-21 22:59:46 -0800 |
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committer | Android Git Automerger <android-git-automerger@android.com> | 2013-11-21 22:59:46 -0800 |
commit | fc806e9720a2d3e1026accb1512841ae530be59c (patch) | |
tree | b0b576160c24e8d22a9b3cbcaade83e5df43f988 /benchmarks | |
parent | c57d3bbeb0059318deb0deb1c173035002fec259 (diff) | |
parent | eaa0add6aaa503221a530d346a3b4a066bc46449 (diff) | |
download | libcore-fc806e9720a2d3e1026accb1512841ae530be59c.zip libcore-fc806e9720a2d3e1026accb1512841ae530be59c.tar.gz libcore-fc806e9720a2d3e1026accb1512841ae530be59c.tar.bz2 |
am eaa0add6: am 48132b98: Merge "Minor cleanup of deepHashCode / deepEquals."
* commit 'eaa0add6aaa503221a530d346a3b4a066bc46449':
Minor cleanup of deepHashCode / deepEquals.
Diffstat (limited to 'benchmarks')
-rw-r--r-- | benchmarks/src/benchmarks/DeepArrayOpsBenchmark.java | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/benchmarks/src/benchmarks/DeepArrayOpsBenchmark.java b/benchmarks/src/benchmarks/DeepArrayOpsBenchmark.java new file mode 100644 index 0000000..09b3186 --- /dev/null +++ b/benchmarks/src/benchmarks/DeepArrayOpsBenchmark.java @@ -0,0 +1,148 @@ +/* + * Copyright (C) 2013 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 com.google.caliper.Param; +import com.google.caliper.SimpleBenchmark; + +import java.lang.reflect.Array; +import java.lang.reflect.Constructor; +import java.util.Arrays; + +public class DeepArrayOpsBenchmark extends SimpleBenchmark { + @Param({"1", "4", "16", "256", "2048"}) int arrayLength; + + private Object[] array; + private Object[] array2; + + private Object[] array3; + private Object[] array4; + + protected void setUp() throws Exception { + array = new Object[arrayLength * 13]; + array2 = new Object[arrayLength * 13]; + for (int i = 0; i < arrayLength; i += 13) { + array[i] = new IntWrapper(i); + array2[i] = new IntWrapper(i); + + array[i + 1] = new16ElementObjectarray(); + array2[i + 1] = new16ElementObjectarray(); + + array[i + 2] = new boolean[16]; + array2[i + 2] = new boolean[16]; + + array[i + 3] = new byte[16]; + array2[i + 3] = new byte[16]; + + array[i + 4] = new char[16]; + array2[i + 4] = new char[16]; + + array[i + 5] = new short[16]; + array2[i + 5] = new short[16]; + + array[i + 6] = new float[16]; + array2[i + 6] = new float[16]; + + array[i + 7] = new long[16]; + array2[i + 7] = new long[16]; + + array[i + 8] = new int[16]; + array2[i + 8] = new int[16]; + + array[i + 9] = new double[16]; + array2[i + 9] = new double[16]; + + // Subarray types are concrete objects. + array[i + 10] = new16ElementArray(String.class, String.class); + array2[i + 10] = new16ElementArray(String.class, String.class); + + array[i + 11] = new16ElementArray(Integer.class, Integer.class); + array2[i + 11] = new16ElementArray(Integer.class, Integer.class); + + // Subarray types is an interface. + array[i + 12] = new16ElementArray(CharSequence.class, String.class); + array2[i + 12] = new16ElementArray(CharSequence.class, String.class); + } + } + + public void timeDeepHashCode(int reps) { + for (int i = 0; i < reps; ++i) { + Arrays.deepHashCode(array); + } + } + + public void timeEquals(int reps) { + for (int i = 0; i < reps; ++i) { + Arrays.deepEquals(array, array2); + } + } + + private static final Object[] new16ElementObjectarray() { + Object[] array = new Object[16]; + for (int i = 0; i < 16; ++i) { + array[i] = new IntWrapper(i); + } + + return array; + } + + @SuppressWarnings("unchecked") + private static final <T, V> T[] new16ElementArray(Class<T> arrayType, Class<V> type) + throws Exception { + T[] array = (T []) Array.newInstance(type, 16); + if (!arrayType.isAssignableFrom(type)) { + throw new IllegalArgumentException(arrayType + " is not assignable from " + type); + } + + Constructor<V> constructor = type.getDeclaredConstructor(String.class); + for (int i = 0; i < 16; ++i) { + array[i] = (T) constructor.newInstance(String.valueOf(i + 1000)); + } + + return array; + } + + /** + * A class that provides very basic equals() and hashCode() operations + * and doesn't resort to memoization tricks like {@link java.lang.Integer}. + * + * Useful for providing equal objects that aren't the same (a.equals(b) but + * a != b). + */ + public static final class IntWrapper { + private final int wrapped; + + public IntWrapper(int wrap) { + wrapped = wrap; + } + + @Override + public int hashCode() { + return wrapped; + } + + @Override + public boolean equals(Object o) { + if (!(o instanceof IntWrapper)) { + return false; + } + + return ((IntWrapper) o).wrapped == this.wrapped; + } + } +} + |