| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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.regression; |
| |
| import com.google.caliper.Param; |
| |
| public class StringReplaceAllBenchmark { |
| // NOTE: These estimates of MOVEABLE / NON_MOVEABLE are based on a knowledge of |
| // ART implementation details. They make a difference here because JNI calls related |
| // to strings took different paths depending on whether the String in question was |
| // moveable or not. |
| enum StringLengths { |
| EMPTY(""), |
| MOVEABLE_16(makeString(16)), |
| MOVEABLE_256(makeString(256)), |
| MOVEABLE_1024(makeString(1024)), |
| NON_MOVEABLE(makeString(64 * 1024)), |
| BOOT_IMAGE(java.util.jar.JarFile.MANIFEST_NAME); |
| |
| private final String value; |
| |
| StringLengths(String s) { |
| this.value = s; |
| } |
| } |
| |
| private static final String makeString(int length) { |
| final String sequence8 = "abcdefghijklmnop"; |
| final int numAppends = (length / 16) - 1; |
| StringBuilder stringBuilder = new StringBuilder(length); |
| |
| // (n-1) occurences of "abcdefghijklmnop" |
| for (int i = 0; i < numAppends; ++i) { |
| stringBuilder.append(sequence8); |
| } |
| |
| // and one final occurence of qrstuvwx. |
| stringBuilder.append("qrstuvwx"); |
| |
| return stringBuilder.toString(); |
| } |
| |
| @Param private StringLengths s; |
| |
| public void timeReplaceAllTrivialPatternNonExistent(int reps) { |
| for (int i = 0; i < reps; ++i) { |
| s.value.replaceAll("fish", "0"); |
| } |
| } |
| |
| public void timeReplaceTrivialPatternAllRepeated(int reps) { |
| for (int i = 0; i < reps; ++i) { |
| s.value.replaceAll("jklm", "0"); |
| } |
| } |
| |
| public void timeReplaceAllTrivialPatternSingleOccurence(int reps) { |
| for (int i = 0; i < reps; ++i) { |
| s.value.replaceAll("qrst", "0"); |
| } |
| } |
| } |