71 lines
3.3 KiB
C#
71 lines
3.3 KiB
C#
using AyCode.Core.Serializers.Binaries;
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using AyCode.Core.Tests.TestModels;
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using System.Buffers;
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using System.Runtime.CompilerServices;
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namespace AyCode.Core.Benchmarks.Workloads.Scenarios;
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/// <summary>
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/// Benchmarks AcBinary via the IBufferWriter overload with a pre-allocated, reused ArrayBufferWriter.
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/// Realistic IBufferWriter usage pattern: caller owns + reuses the writer (zero alloc per call after warmup).
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/// </summary>
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public sealed class AcBinaryBufferWriterBenchmark<T> : ISerializerBenchmark where T : class
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{
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private readonly T _order;
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private readonly AcBinarySerializerOptions _options;
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private readonly byte[] _serialized;
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private readonly ArrayBufferWriter<byte> _bufferWriter;
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public BenchmarkEngine Engine => BenchmarkEngine.AcBinary;
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public BenchmarkIoMode IoMode => BenchmarkIoMode.BufWrReuse;
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public BenchmarkDispatchMode DispatchMode => _options.UseGeneratedCode ? BenchmarkDispatchMode.SGen : BenchmarkDispatchMode.Runtime;
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public Type OrderType => typeof(T);
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public string OptionsPreset { get; }
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public int SerializedSize => _serialized.Length;
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public long SetupSerializeAllocBytes { get; }
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public long SetupDeserializeAllocBytes => 0;
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public string OptionsDescription => BenchmarkOptions.BuildAcBinary(_options);
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public AcBinaryBufferWriterBenchmark(T order, AcBinarySerializerOptions options, string optionsPreset)
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{
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_order = order;
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_options = options;
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OptionsPreset = optionsPreset;
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_serialized = AcBinarySerializer.Serialize(order, options);
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// Measure ONLY the BufferWriter infrastructure setup on the serialize side (excluding the
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// helper Serialize above). Deserialize side reads directly from `_serialized` byte[] — no
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// dedicated setup allocation, hence SetupDeserializeAllocBytes = 0.
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GC.Collect(); GC.WaitForPendingFinalizers(); GC.Collect();
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var beforeSetup = GC.GetAllocatedBytesForCurrentThread();
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_bufferWriter = new ArrayBufferWriter<byte>(_serialized.Length * 2);
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var afterSetup = GC.GetAllocatedBytesForCurrentThread();
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SetupSerializeAllocBytes = afterSetup - beforeSetup;
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}
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[MethodImpl(MethodImplOptions.NoInlining)]
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public void Serialize()
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{
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_bufferWriter.ResetWrittenCount(); // reuse — no alloc, no zeroing
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AcBinarySerializer.Serialize(_order, _bufferWriter, _options);
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}
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// BufWr semantic: read from a ReadOnlySequence<byte> (the ROS overload), NOT from byte[] —
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// single-segment array-backed sequence triggers the fast-path in AcBinaryDeserializer.cs:298 which
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// redirects to the byte[] overload. This means the bench actually exercises the ROS-input path
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// (the production-realistic surface for SignalR / Pipe consumers) rather than secretly testing
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// byte[] Deser under the BufWr label.
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[MethodImpl(MethodImplOptions.NoInlining)]
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public void Deserialize() => AcBinaryDeserializer.Deserialize<T>(new ReadOnlySequence<byte>(_serialized), _options);
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public bool VerifyRoundTrip()
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{
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_bufferWriter.ResetWrittenCount();
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AcBinarySerializer.Serialize(_order, _bufferWriter, _options);
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var roundTripped = AcBinaryDeserializer.Deserialize<T>(new ReadOnlySequence<byte>(_bufferWriter.WrittenMemory), _options);
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return RoundTripValidator.DeepEqualsViaJson(_order, roundTripped);
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}
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}
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