/*
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* Copyright (C) 2010 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package benchmarks.regression;
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import com.google.caliper.Param;
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/**
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* Testing the old canard that looping backwards is faster.
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*
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* @author Kevin Bourrillion
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*/
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public class LoopingBackwardsBenchmark {
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@Param({"2", "20", "2000", "20000000"}) int max;
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public int timeForwards(int reps) {
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int dummy = 0;
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for (int i = 0; i < reps; i++) {
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for (int j = 0; j < max; j++) {
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dummy += j;
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}
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}
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return dummy;
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}
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public int timeBackwards(int reps) {
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int dummy = 0;
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for (int i = 0; i < reps; i++) {
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for (int j = max - 1; j >= 0; j--) {
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dummy += j;
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}
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}
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return dummy;
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}
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}
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