| /* |
| * Copyright (C) 2022 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 android.libcore.regression; |
| |
| import android.perftests.utils.BenchmarkState; |
| import android.perftests.utils.PerfStatusReporter; |
| import android.test.suitebuilder.annotation.LargeTest; |
| |
| import junitparams.JUnitParamsRunner; |
| import junitparams.Parameters; |
| |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.util.Arrays; |
| import java.util.Collection; |
| |
| @RunWith(JUnitParamsRunner.class) |
| @LargeTest |
| public class StringReplacePerfTest { |
| @Rule public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter(); |
| |
| enum StringLengths { |
| EMPTY(""), |
| L_16(makeString(16)), |
| L_64(makeString(64)), |
| L_256(makeString(256)), |
| L_512(makeString(512)); |
| |
| private final String mValue; |
| |
| StringLengths(String s) { |
| this.mValue = s; |
| } |
| } |
| |
| private static String makeString(int length) { |
| final String sequence8 = "abcdefghijklmnop"; |
| final int numAppends = (length / 16) - 1; |
| StringBuilder stringBuilder = new StringBuilder(length); |
| |
| // (n-1) occurrences of "abcdefghijklmnop" |
| for (int i = 0; i < numAppends; ++i) { |
| stringBuilder.append(sequence8); |
| } |
| |
| // and one final occurrence of qrstuvwx. |
| stringBuilder.append("qrstuvwx"); |
| |
| return stringBuilder.toString(); |
| } |
| |
| public static Collection<Object[]> getData() { |
| return Arrays.asList( |
| new Object[][] { |
| {StringLengths.EMPTY}, |
| {StringLengths.L_16}, |
| {StringLengths.L_64}, |
| {StringLengths.L_256}, |
| {StringLengths.L_512} |
| }); |
| } |
| |
| @Test |
| @Parameters(method = "getData") |
| public void timeReplaceCharNonExistent(StringLengths stringLengths) { |
| BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); |
| while (state.keepRunning()) { |
| stringLengths.mValue.replace('z', '0'); |
| } |
| } |
| |
| @Test |
| @Parameters(method = "getData") |
| public void timeReplaceCharRepeated(StringLengths stringLengths) { |
| BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); |
| while (state.keepRunning()) { |
| stringLengths.mValue.replace('a', '0'); |
| } |
| } |
| |
| @Test |
| @Parameters(method = "getData") |
| public void timeReplaceSingleChar(StringLengths stringLengths) { |
| BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); |
| while (state.keepRunning()) { |
| stringLengths.mValue.replace('q', '0'); |
| } |
| } |
| |
| @Test |
| @Parameters(method = "getData") |
| public void timeReplaceSequenceNonExistent(StringLengths stringLengths) { |
| BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); |
| while (state.keepRunning()) { |
| stringLengths.mValue.replace("fish", "0"); |
| } |
| } |
| |
| @Test |
| @Parameters(method = "getData") |
| public void timeReplaceSequenceRepeated(StringLengths stringLengths) { |
| BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); |
| while (state.keepRunning()) { |
| stringLengths.mValue.replace("jklm", "0"); |
| } |
| } |
| |
| @Test |
| @Parameters(method = "getData") |
| public void timeReplaceSingleSequence(StringLengths stringLengths) { |
| BenchmarkState state = mPerfStatusReporter.getBenchmarkState(); |
| while (state.keepRunning()) { |
| stringLengths.mValue.replace("qrst", "0"); |
| } |
| } |
| } |