Add the code.google.com/p/dalvik benchmarks to libcore.

I'll remove them from code.google.com afterwards.

Change-Id: I369a301ed0e116c7971caebc607c5a86d06d4ee2

1 files changed, 75 insertions, 0 deletions

diff --git a/benchmarks/regression/DoPrivilegedBenchmark.java b/benchmarks/regression/DoPrivilegedBenchmark.java
new file mode 100644
index 0000000..effb284
--- /dev/null
+++ b/benchmarks/regression/DoPrivilegedBenchmark.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2010 Google Inc.
+ * 
+ * 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.regression;
+
+import com.google.caliper.Param;
+import com.google.caliper.Runner;
+import com.google.caliper.SimpleBenchmark;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+public class DoPrivilegedBenchmark extends SimpleBenchmark {
+    public void timeDirect(int reps) throws Exception {
+        for (int i = 0; i < reps; ++i) {
+            String lineSeparator = System.getProperty("line.separator");
+        }
+    }
+    
+    public void timeFastAndSlow(int reps) throws Exception {
+        for (int i = 0; i < reps; ++i) {
+            String lineSeparator;
+            if (System.getSecurityManager() == null) {
+                lineSeparator = System.getProperty("line.separator");
+            } else {
+                lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() {
+                    public String run() {
+                        return System.getProperty("line.separator");
+                    }
+                });
+            }
+        }
+    }
+    
+    public void timeNewAction(int reps) throws Exception {
+        for (int i = 0; i < reps; ++i) {
+            String lineSeparator = AccessController.doPrivileged(new PrivilegedAction<String>() {
+                public String run() {
+                    return System.getProperty("line.separator");
+                }
+            });
+        }
+    }
+    
+    public void timeReusedAction(int reps) throws Exception {
+        final PrivilegedAction<String> action = new ReusableAction("line.separator");
+        for (int i = 0; i < reps; ++i) {
+            String lineSeparator = AccessController.doPrivileged(action);
+        }
+    }
+    
+    private static final class ReusableAction implements PrivilegedAction<String> {
+        private final String propertyName;
+        
+        public ReusableAction(String propertyName) {
+            this.propertyName = propertyName;
+        }
+        
+        public String run() {
+            return System.getProperty(propertyName);
+        }
+    }
+}