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+/*
+ * Copyright (C) 2009 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 examples;
+
+import com.google.caliper.Param;
+import com.google.caliper.Runner;
+import com.google.caliper.SimpleBenchmark;
+
+/**
+ * Tests the performance of various StringBuilder methods.
+ */
+public class StringBuilderBenchmark extends SimpleBenchmark {
+
+ @Param({"1", "10", "100"}) private int length;
+
+ public void timeAppendBoolean(int reps) {
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(true);
+ }
+ }
+ }
+
+ public void timeAppendChar(int reps) {
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append('c');
+ }
+ }
+ }
+
+ public void timeAppendCharArray(int reps) {
+ char[] chars = "chars".toCharArray();
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(chars);
+ }
+ }
+ }
+
+ public void timeAppendCharSequence(int reps) {
+ CharSequence cs = "chars";
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(cs);
+ }
+ }
+ }
+
+ public void timeAppendDouble(int reps) {
+ double d = 1.2;
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(d);
+ }
+ }
+ }
+
+ public void timeAppendFloat(int reps) {
+ float f = 1.2f;
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(f);
+ }
+ }
+ }
+
+ public void timeAppendInt(int reps) {
+ int n = 123;
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(n);
+ }
+ }
+ }
+
+ public void timeAppendLong(int reps) {
+ long l = 123;
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(l);
+ }
+ }
+ }
+
+ public void timeAppendObject(int reps) {
+ Object o = new Object();
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(o);
+ }
+ }
+ }
+
+ public void timeAppendString(int reps) {
+ String s = "chars";
+ for (int i = 0; i < reps; ++i) {
+ StringBuilder sb = new StringBuilder();
+ for (int j = 0; j < length; ++j) {
+ sb.append(s);
+ }
+ }
+ }
+
+
+ // TODO: remove this from all examples when IDE plugins are ready
+ public static void main(String[] args) throws Exception {
+ Runner.main(StringBuilderBenchmark.class, args);
+ }
+}