amit2103
74 lines
2.3 KiB
Java
74 lines
2.3 KiB
Java
package com.baeldung.stringdiff;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.TimeUnit;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.bitbucket.cowwoc.diffmatchpatch.DiffMatchPatch;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.runner.Runner;
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import org.openjdk.jmh.runner.RunnerException;
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import org.openjdk.jmh.runner.options.Options;
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import org.openjdk.jmh.runner.options.OptionsBuilder;
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.MILLISECONDS)
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@State(Scope.Benchmark)
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public class StringDiffBenchmarkUnitTest {
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private DiffMatchPatch diffMatchPatch = new DiffMatchPatch();
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private List<String> inputs = randomizeInputs(10000);
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public static void main(String[] args) throws RunnerException {
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Options opts = new OptionsBuilder().include(".*")
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.warmupIterations(1)
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.measurementIterations(50)
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.jvmArgs("-Xms2g", "-Xmx2g")
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.shouldDoGC(true)
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.forks(1)
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.build();
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new Runner(opts).run();
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}
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@Benchmark
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public int diffMatchPatch() {
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for (int i = 0; i < inputs.size() - 1; i++) {
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diffMatchPatch.diffMain(inputs.get(i), inputs.get(i + 1), false);
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}
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return inputs.size();
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}
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@Benchmark
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public int stringUtils() {
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for (int i = 0; i < inputs.size() - 1; i++) {
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StringUtils.difference(inputs.get(i), inputs.get(i + 1));
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}
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return inputs.size();
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}
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/**
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* Creates a list of a given size, containing 30 character long strings,
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* each starting with a static prefix of 10 characters and followed by
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* a random 20 character suffix
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*
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* @return a {@link List} of randomised strings
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*/
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private List<String> randomizeInputs(int size) {
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String staticPart = "ABCDEF1234";
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List<String> inputs = new ArrayList<>();
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for (int i = 0; i < size; i++) {
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inputs.add(staticPart + RandomStringUtils.randomAlphabetic(20));
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}
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return inputs;
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}
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}
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