public class InputGenerator {
    private static final String JAVADOC_PATH = "your_path_to_JDK/docs";
    public static final File FILE_PATH = new File( "your_output_file_path" );

    static
    {
        try {
            if ( !FILE_PATH.exists() )
                makeJavadocFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static void makeJavadocFile() throws IOException {
        try( OutputStream os = new BufferedOutputStream( new FileOutputStream( FILE_PATH ), 65536 ) )
        {
            appendDir(os, new File( JAVADOC_PATH ));
        }
        System.out.println( "Javadoc file created" );
    }

    private static void appendDir( final OutputStream os, final File root ) throws IOException {
        for ( File f : root.listFiles() )
        {
            if ( f.isDirectory() )
                appendDir( os, f );
            else
                Files.copy(f.toPath(), os);
        }
    }
}

@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Thread)
@Fork(1)
@Warmup(iterations = 2)
@Measurement(iterations = 3)
@BenchmarkMode(Mode.SingleShotTime)
public class TestParent {
    protected Path m_inputFile;

    @Setup
    public void setup()
    {
        m_inputFile = InputGenerator.FILE_PATH.toPath();
    }

    interface StreamFactory
    {
        public OutputStream getStream( final OutputStream underlyingStream ) throws IOException;
    }

    public int baseBenchmark( final StreamFactory factory ) throws IOException
    {
        try ( ByteArrayOutputStream bos = new ByteArrayOutputStream((int) m_inputFile.toFile().length());
              OutputStream os = factory.getStream( bos ) )
        {
            Files.copy(m_inputFile, os);
            os.flush();
            return bos.size();
        }
    }
}

public class JdkDeflateTest extends TestParent {
    @Param({"1", "2", "3", "4", "5", "6", "7", "8", "9"})
    public int m_lvl;

    @Benchmark
    public int deflate() throws IOException
    {
        return baseBenchmark(new StreamFactory() {
            @Override
            public OutputStream getStream(OutputStream underlyingStream) throws IOException {
                final Deflater deflater = new Deflater( m_lvl, true );
                return new DeflaterOutputStream( underlyingStream, deflater, 512 );
            }
        });
    }
}