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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 com.google.caliper.examples;
+
+import com.google.caliper.SimpleBenchmark;
+import com.google.caliper.Param;
+import com.google.caliper.Runner;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+/**
+ * Measures the various ways the JDK converts boxed Doubles to Strings.
+ */
+public class BoxedDoubleToStringBenchmark extends SimpleBenchmark {
+
+ @Param private Double d;
+
+ private static final Collection<Double> dValues = Arrays.asList(
+ Math.PI,
+ -0.0d,
+ Double.NEGATIVE_INFINITY,
+ Double.NaN
+ );
+
+ public int timeStringFormat(int reps) {
+ Double value = d;
+ int dummy = 0;
+ for (int i = 0; i < reps; i++) {
+ dummy += String.format("%f", value).length();
+ }
+ return dummy;
+ }
+
+ public int timeToString(int reps) {
+ Double value = d;
+ int dummy = 0;
+ for (int i = 0; i < reps; i++) {
+ dummy += value.toString().length();
+ }
+ return dummy;
+ }
+
+ public int timeStringValueOf(int reps) {
+ Double value = d;
+ int dummy = 0;
+ for (int i = 0; i < reps; i++) {
+ dummy += String.valueOf(value).length();
+ }
+ return dummy;
+ }
+
+ public int timeQuoteTrick(int reps) {
+ Double value = d;
+ int dummy = 0;
+ for (int i = 0; i < reps; i++) {
+ dummy = ("" + value).length();
+ }
+ return dummy;
+ }
+
+ // TODO: remove this from all examples when IDE plugins are ready
+ public static void main(String[] args) throws Exception {
+ Runner.main(BoxedDoubleToStringBenchmark.class, args);
+ }
+}