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Performance tests for TinySerializer.

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package eu.toolchain.serializer.perftests.benchmarks;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.function.Supplier;

import org.nustaq.serialization.FSTConfiguration;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.infra.Blackhole;

import eu.toolchain.serializer.perftests.MutableSerializedObject;
import eu.toolchain.serializer.perftests.ObjectHelper;
import eu.toolchain.serializer.perftests.OutputStreamHelper;

@State(Scope.Benchmark)
public class FSTPerformance {
    final MutableSerializedObject object = ObjectHelper.newMutableSerializedObject();
    final OutputStream nullStream = OutputStreamHelper.newNullStream();

    final FSTConfiguration conf = FSTConfiguration.createDefaultConfiguration();

    final Supplier inputObject = ObjectHelper.supplyInputStreamFrom(() -> {
        try (final ByteArrayOutputStream output = new ByteArrayOutputStream()) {
            conf.encodeToStream(output, object);
            return output.toByteArray();
        }
    });

    @Benchmark
    public void testSerializeToNull() throws Exception {
        conf.encodeToStream(nullStream, object);
    }

    @Benchmark
    public void testSerializeToMemory(Blackhole bh) throws Exception {
        final ByteArrayOutputStream output = new ByteArrayOutputStream();
        conf.encodeToStream(output, object);
        bh.consume(output.toByteArray());
    }

    @Benchmark
    public void testDeserializeFromMemory(Blackhole bh) throws Exception {
        bh.consume(conf.decodeFromStream(inputObject.get()));
    }
}