| /* |
| * 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; |
| import com.google.common.collect.ImmutableList; |
| import java.util.Collection; |
| |
| /** |
| * Measures the various ways the JDK converts primitive doubles to Strings. |
| */ |
| public class PrimitiveDoubleToStringBenchmark extends SimpleBenchmark { |
| |
| @Param private double d; |
| |
| public static final Collection<Double> dValues = ImmutableList.of( |
| 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 += ((Double) 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(PrimitiveDoubleToStringBenchmark.class, args); |
| } |
| } |