feat: add basic deserialization benchmark

serialization-msgpack/src/jvmBenchmark/kotlin/com.ensarsarajcic.kotlinx.serialization.msgpack/DeserializeBenchmarks.kt

@@ -0,0 +1,50 @@
+package com.ensarsarajcic.kotlinx.serialization.msgpack
+
+import com.ensarsarajcic.kotlinx.serialization.msgpack.internal.BasicMsgPackDecoder
+import com.ensarsarajcic.kotlinx.serialization.msgpack.stream.toMsgPackBuffer
+import kotlinx.benchmark.Benchmark
+import kotlinx.benchmark.BenchmarkMode
+import kotlinx.benchmark.BenchmarkTimeUnit
+import kotlinx.benchmark.Measurement
+import kotlinx.benchmark.Mode
+import kotlinx.benchmark.OutputTimeUnit
+import kotlinx.benchmark.Scope
+import kotlinx.benchmark.State
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.modules.SerializersModule
+
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(BenchmarkTimeUnit.NANOSECONDS)
+@Measurement(iterations = 20, time = 1, timeUnit = BenchmarkTimeUnit.SECONDS)
+@State(Scope.Benchmark)
+open class DeserializeBenchmarks {
+    @Serializable
+    data class SampleClassWithNestedClass(
+        val testString: String,
+        val testInt: Int,
+        val testBoolean: Boolean,
+        val testNested: NestedClass,
+        val secondNested: NestedClass? = null,
+    ) {
+        @Serializable
+        data class NestedClass(
+            val testInt: Int? = null,
+        )
+    }
+
+    // The actual benchmark method
+    @Benchmark
+    fun benchmarkMethod() {
+        val decoder =
+            BasicMsgPackDecoder(
+                MsgPackConfiguration.default.copy(ignoreUnknownKeys = true),
+                SerializersModule {
+                },
+                @Suppress("ktlint:standard:max-line-length")
+                "85aa74657374537472696e67a3646566a774657374496e747bab74657374426f6f6c65616ec3aa746573744e657374656483aa74657374537472696e67a3646566ab74657374426f6f6c65616ec3ae616e6f74686572556e6b6e6f776ea474657374ac7365636f6e644e657374656481ab74657374426f6f6c65616ec2".hexStringToByteArray().toMsgPackBuffer(),
+            )
+        SampleClassWithNestedClass.serializer().deserialize(decoder)
+    }
+}
+
+fun String.hexStringToByteArray() = ByteArray(this.length / 2) { this.substring(it * 2, it * 2 + 2).toInt(16).toByte() }