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JAVA-12080 Update When to Use a Parallel Stream in Java

This commit is contained in:
anuragkumawat 2022-06-25 22:17:32 +05:30
parent 1ee4a09b2e
commit bf6c478bb5
1501 changed files with 1534 additions and 0 deletions
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package com.baeldung.streams.parallel;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
public class FileSearchCost {
@Benchmark
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public static void textFileSearchSequential() throws IOException {
Files.walk(Paths.get("src/main/resources/filesearch/")).map(Path::normalize).filter(Files::isRegularFile)
.filter(path -> path.getFileName().toString().endsWith(".txt")).collect(Collectors.toList());
}
@Benchmark
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public static void textFileSearchParallel() throws IOException {
Files.walk(Paths.get("src/main/resources/filesearch/")).parallel().map(Path::normalize).filter(Files::isRegularFile)
.filter(path -> path.getFileName().toString().endsWith(".txt")).collect(Collectors.toList());
}
}

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