diff options
Diffstat (limited to 'test/com/google/caliper/examples/BoxedDoubleToStringBenchmark.java')
-rw-r--r-- | test/com/google/caliper/examples/BoxedDoubleToStringBenchmark.java | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/test/com/google/caliper/examples/BoxedDoubleToStringBenchmark.java b/test/com/google/caliper/examples/BoxedDoubleToStringBenchmark.java new file mode 100644 index 0000000..5e6cbfa --- /dev/null +++ b/test/com/google/caliper/examples/BoxedDoubleToStringBenchmark.java @@ -0,0 +1,80 @@ +/* + * 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); + } +} |