53 lines
1.8 KiB
Java
53 lines
1.8 KiB
Java
package com.baeldung.reduce.benchmarks;
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import com.baeldung.reduce.entities.User;
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import java.util.ArrayList;
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import java.util.List;
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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.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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@State(Scope.Thread)
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@BenchmarkMode(Mode.AverageTime)
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public class JMHStreamReduceBenchMark {
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private final List<User> userList = createUsers();
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public static void main(String[] args) throws RunnerException {
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Options options = new OptionsBuilder()
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.include(JMHStreamReduceBenchMark.class.getSimpleName()).threads(1)
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.forks(1).shouldFailOnError(true).shouldDoGC(true)
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.jvmArgs("-server").build();
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new Runner(options).run();
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}
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private List<User> createUsers() {
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List<User> users = new ArrayList<>();
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for (int i = 0; i <= 1000000; i++) {
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users.add(new User("John" + i, i));
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}
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return users;
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}
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@Benchmark
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public Integer executeReduceOnParallelizedStream() {
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return this.userList
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.parallelStream()
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.reduce(0, (partialAgeResult, user) -> partialAgeResult + user.getAge(), Integer::sum);
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}
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@Benchmark
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public Integer executeReduceOnSequentialStream() {
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return this.userList
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.stream()
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.reduce(0, (partialAgeResult, user) -> partialAgeResult + user.getAge(), Integer::sum);
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}
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}
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