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package kotlinx.benchmarks.json
import kotlinx.serialization.*
import kotlinx.serialization.json.*
import kotlinx.serialization.modules.*
import org.openjdk.jmh.annotations.*
import java.util.concurrent.*
@Warmup(iterations = 7, time = 1)
@Measurement(iterations = 5, time = 1)
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Benchmark)
@Fork(1)
open class PolymorphismOverheadBenchmark {
@Serializable
@JsonClassDiscriminator("poly")
data class PolymorphicWrapper(val i: @Polymorphic Poly, val i2: Impl) // amortize the cost a bit
@Serializable
data class SimpleWrapper(val poly: @Polymorphic Poly)
@Serializable
data class BaseWrapper(val i: Impl, val i2: Impl)
@JsonClassDiscriminator("poly")
interface Poly
@Serializable
@JsonClassDiscriminator("poly")
class Impl(val a: Int, val b: String) : Poly
private val impl = Impl(239, "average_size_string")
private val module = SerializersModule {
polymorphic(Poly::class) {
subclass(Impl.serializer())
}
}
private val json = Json { serializersModule = module }
private val implString = json.encodeToString(impl)
private val polyString = json.encodeToString<Poly>(impl)
private val serializer = serializer<Poly>()
private val wrapper = SimpleWrapper(Impl(1, "abc"))
private val wrapperString = json.encodeToString(wrapper)
private val wrapperSerializer = serializer<SimpleWrapper>()
// 5000
@Benchmark
fun base() = json.decodeFromString(Impl.serializer(), implString)
// As of 1.3.x
// Baseline -- 1500
// v1, no skip -- 2000
// v2, with skip -- 3000 [withdrawn]
@Benchmark
fun poly() = json.decodeFromString(serializer, polyString)
// test for child polymorphic serializer in decoding
@Benchmark
fun polyChildDecode() = json.decodeFromString(wrapperSerializer, wrapperString)
// test for child polymorphic serializer in encoding
@Benchmark
fun polyChildEncode() = json.encodeToString(wrapperSerializer, wrapper)
}
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