197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes/* 297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * Copyright (C) 2010 Google Inc. 397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * 497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * Licensed under the Apache License, Version 2.0 (the "License"); 597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * you may not use this file except in compliance with the License. 697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * You may obtain a copy of the License at 797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * 897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * http://www.apache.org/licenses/LICENSE-2.0 997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * 1097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * Unless required by applicable law or agreed to in writing, software 1197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * distributed under the License is distributed on an "AS IS" BASIS, 1297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * See the License for the specific language governing permissions and 1497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes * limitations under the License. 1597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes */ 1697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 1797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughespackage benchmarks.regression; 1897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 1997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport com.google.caliper.Param; 2097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport com.google.caliper.Runner; 2197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughesimport com.google.caliper.SimpleBenchmark; 2297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes 2397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughespublic class IntConstantMultiplicationBenchmark extends SimpleBenchmark { 2497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant6(int reps) { 2597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 2697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 2797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 6; 2897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 2997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 3097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 3197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant7(int reps) { 3297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 3397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 3497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 7; 3597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 3697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 3797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 3897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant8(int reps) { 3997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 4097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 4197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 8; 4297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 4397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 4497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 4597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant8_Shift(int reps) { 4697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 4797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 4897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result <<= 3; 4997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 5197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant10(int reps) { 5397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 5497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 5597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 10; 5697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 5897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 5997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant10_Shift(int reps) { 6097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 6197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 6297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result = (result + (result << 2)) << 1; 6397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 6497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 6597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 6697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant2047(int reps) { 6797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 6897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 6997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 2047; 7097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 7197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 7297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 7397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant2048(int reps) { 7497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 7597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 7697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 2048; 7797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 7897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 7997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 8097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByConstant2049(int reps) { 8197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 8297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 8397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= 2049; 8497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 8597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 8697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 8797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByVariable10(int reps) { 8897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 8997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int factor = 10; 9097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 9197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= factor; 9297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 9397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 9497aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 9597aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes public int timeMultiplyIntByVariable8(int reps) { 9697aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int result = 1; 9797aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes int factor = 8; 9897aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes for (int i = 0; i < reps; ++i) { 9997aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes result *= factor; 10097aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 10197aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes return result; 10297aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes } 10397aba27f961a5a6f37dcaf7f455df371e250ede3Elliott Hughes} 104