Automatic sources dropoff on 2020-06-10 18:32:38.095721
The change is generated with prebuilt drop tool.
Change-Id: I24cbf6ba6db262a1ae1445db1427a08fee35b3b4
diff --git a/benchmarks/regression/CharsetBenchmark.java b/benchmarks/regression/CharsetBenchmark.java
new file mode 100644
index 0000000..131dc8a
--- /dev/null
+++ b/benchmarks/regression/CharsetBenchmark.java
@@ -0,0 +1,84 @@
+/*
+ * 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;
+
+public class CharsetBenchmark {
+ @Param({ "1", "10", "100", "1000", "10000" })
+ private int length;
+
+ // canonical => canonical charset name
+ // built-in => guaranteed-present charset
+ // special-case => libcore treats this charset specially for performance
+ @Param({
+ "UTF-16", // canonical, built-in, non-special-case
+ "UTF-8", // canonical, built-in, special-case
+ "UTF8", // non-canonical, built-in, special-case
+ "ISO-8859-1", // canonical, built-in, special-case
+ "8859_1", // non-canonical, built-in, special-case
+ "ISO-8859-2", // canonical, non-built-in, non-special-case
+ "8859_2", // non-canonical, non-built-in, non-special-case
+ "US-ASCII", // canonical, built-in, special-case
+ "ASCII" // non-canonical, built-in, special-case
+ })
+ private String name;
+
+ public void time_new_String_BString(int reps) throws Exception {
+ byte[] bytes = makeBytes(makeString(length));
+ for (int i = 0; i < reps; ++i) {
+ new String(bytes, name);
+ }
+ }
+
+ public void time_new_String_BII(int reps) throws Exception {
+ byte[] bytes = makeBytes(makeString(length));
+ for (int i = 0; i < reps; ++i) {
+ new String(bytes, 0, bytes.length);
+ }
+ }
+
+ public void time_new_String_BIIString(int reps) throws Exception {
+ byte[] bytes = makeBytes(makeString(length));
+ for (int i = 0; i < reps; ++i) {
+ new String(bytes, 0, bytes.length, name);
+ }
+ }
+
+ public void time_String_getBytes(int reps) throws Exception {
+ String string = makeString(length);
+ for (int i = 0; i < reps; ++i) {
+ string.getBytes(name);
+ }
+ }
+
+ private static String makeString(int length) {
+ StringBuilder result = new StringBuilder(length);
+ for (int i = 0; i < length; ++i) {
+ result.append('A' + (i % 26));
+ }
+ return result.toString();
+ }
+
+ private static byte[] makeBytes(String s) {
+ try {
+ return s.getBytes("US-ASCII");
+ } catch (Exception ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+}
