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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;
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);
}
}
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