/* * Copyright (C) 2014 The Guava Authors * * 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.common.base; import com.google.caliper.BeforeExperiment; import com.google.caliper.Benchmark; import com.google.caliper.Param; import java.util.ArrayList; import java.util.Collections; import java.util.List; @SuppressWarnings("unused") // Nested enums used reflectively in setUp. public class EnumsBenchmark { @Param({"Small", "Medium", "Large"}) String enumSize; @Param({"0.2", "0.8"}) float hitRate; // We could avoid the raw type here by initializing this with a ternary (? SmallEnum.class : ...). // However, we end up needing a raw type in getIfPresent, as discussed there. @SuppressWarnings("rawtypes") private Class enumType; private String[] sampleData; @BeforeExperiment void setUp() throws ClassNotFoundException { Preconditions.checkArgument(hitRate >= 0 && hitRate <= 1, "hitRate must be in the range [0,1]"); enumType = Class.forName(EnumsBenchmark.class.getCanonicalName() + "$" + enumSize + "Enum") .asSubclass(Enum.class); Enum[] allConstants = enumType.getEnumConstants(); List hits = new ArrayList<>(); for (int i = 0; i < hitRate * 256 / 3; ++i) { hits.add(allConstants[0].name()); hits.add(allConstants[allConstants.length / 2].name()); hits.add(allConstants[allConstants.length - 1].name()); } List misses = new ArrayList<>(); for (int i = 0; i < 256 - hits.size(); ++i) { misses.add("INVALID"); } List sampleDataList = new ArrayList<>(); sampleDataList.addAll(hits); sampleDataList.addAll(misses); Collections.shuffle(sampleDataList); sampleData = sampleDataList.toArray(new String[sampleDataList.size()]); } // Since we can't pass a concrete SomeEnum.class directly, we need to use a raw type. @SuppressWarnings("unchecked") @Benchmark boolean getIfPresent(int repetitions) { boolean retVal = false; for (int i = 0; i < repetitions; ++i) { retVal &= Enums.getIfPresent(enumType, sampleData[i & 255]).isPresent(); } return retVal; } private enum SmallEnum { X0, X1, X2 } private enum MediumEnum { X0, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12, X13, X14, X15, X16, X17, X18, X19, X20, X21, X22, X23, X24, X25, X26, X27, X28, X29, X30, X31, X32, X33, X34, X35, X36, X37, X38, X39, X40, X41, X42, X43, X44, X45, X46, X47, X48, X49, X50, X51, X52, X53, X54, X55, X56, X57, X58, X59, X60, X61, X62, X63, X64, X65, X66, X67, X68, X69, X70, X71, X72, X73, X74, X75, X76, X77, X78, X79, X80, X81, X82, X83, X84, X85, X86, X87, X88, X89, X90, X91, X92, X93, X94, X95, X96, X97, X98, X99 } private enum LargeEnum { X0, X1, X2, X3, X4, X5, X6, X7, X8, 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X191, X192, X193, X194, X195, X196, X197, X198, X199, X200, X201, X202, X203, X204, X205, X206, X207, X208, X209, X210, X211, X212, X213, X214, X215, X216, X217, X218, X219, X220, X221, X222, X223, X224, X225, X226, X227, X228, X229, X230, X231, X232, X233, X234, X235, X236, X237, X238, X239, X240, X241, X242, X243, X244, X245, X246, X247, X248, X249, X250, X251, X252, X253, X254, X255, X256, X257, X258, X259, X260, X261, X262, X263, X264, X265, X266, X267, X268, X269, X270, X271, X272, X273, X274, X275, X276, X277, X278, X279, X280, X281, X282, X283, X284, X285, X286, X287, X288, X289, X290, X291, X292, X293, X294, X295, X296, X297, X298, X299, X300, X301, X302, X303, X304, X305, X306, X307, X308, X309, X310, X311, X312, X313, X314, X315, X316, X317, X318, X319, X320, X321, X322, X323, X324, X325, X326, X327, X328, X329, X330, X331, X332, X333, X334, X335, X336, X337, X338, X339, X340, X341, X342, X343, X344, X345, X346, X347, X348, X349, X350, X351, X352, X353, X354, X355, X356, 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