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-rw-r--r--benchmarks/src/benchmarks/ReferenceGetBenchmark.java60
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diff --git a/benchmarks/src/benchmarks/ReferenceGetBenchmark.java b/benchmarks/src/benchmarks/ReferenceGetBenchmark.java
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+++ b/benchmarks/src/benchmarks/ReferenceGetBenchmark.java
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+/*
+ * Copyright (C) 2014 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.ref.Reference;
+import java.lang.ref.SoftReference;
+import java.lang.ref.WeakReference;
+import java.lang.reflect.*;
+
+public class ReferenceGetBenchmark extends SimpleBenchmark {
+ @Param boolean intrinsicDisabled;
+
+ private Object obj = "str";
+
+ protected void setUp() throws Exception {
+ Field intrinsicDisabledField = Reference.class.getDeclaredField("disableIntrinsic");
+ intrinsicDisabledField.setAccessible(true);
+ intrinsicDisabledField.setBoolean(null, intrinsicDisabled);
+ }
+
+ public void timeSoftReferenceGet(int reps) throws Exception {
+ Reference soft = new SoftReference(obj);
+ for (int i = 0; i < reps; i++) {
+ Object o = soft.get();
+ }
+ }
+
+ public void timeWeakReferenceGet(int reps) throws Exception {
+ Reference weak = new WeakReference(obj);
+ for (int i = 0; i < reps; i++) {
+ Object o = weak.get();
+ }
+ }
+
+ public void timeNonPreservedWeakReferenceGet(int reps) throws Exception {
+ Reference weak = new WeakReference(obj);
+ obj = null;
+ Runtime.getRuntime().gc();
+ for (int i = 0; i < reps; i++) {
+ Object o = weak.get();
+ }
+ }
+}