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Diffstat (limited to 'benchmarks/src/benchmarks/ArrayListIterationBenchmark.java')
-rw-r--r-- | benchmarks/src/benchmarks/ArrayListIterationBenchmark.java | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/benchmarks/src/benchmarks/ArrayListIterationBenchmark.java b/benchmarks/src/benchmarks/ArrayListIterationBenchmark.java new file mode 100644 index 0000000..4e5f145 --- /dev/null +++ b/benchmarks/src/benchmarks/ArrayListIterationBenchmark.java @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2010 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 benchmarks; + +import com.google.caliper.Param; +import com.google.caliper.Runner; +import com.google.caliper.SimpleBenchmark; + +import java.util.ArrayList; + +/** + * Is a hand-coded counted loop through an ArrayList cheaper than enhanced for? + */ +public class ArrayListIterationBenchmark extends SimpleBenchmark { + ArrayList<Foo> mList = new ArrayList<Foo>(); + { + for (int i = 0; i < 27; ++i) mList.add(new Foo()); + } + public void timeArrayListIterationIndexed(int reps) { + for (int rep = 0; rep < reps; ++rep) { + int sum = 0; + ArrayList<Foo> list = mList; + int len = list.size(); + for (int i = 0; i < len; ++i) { + sum += list.get(i).mSplat; + } + } + } + public void timeArrayListIterationForEach(int reps) { + for (int rep = 0; rep < reps; ++rep) { + int sum = 0; + for (Foo a : mList) { + sum += a.mSplat; + } + } + } +} |