serialization improves and benchmarks

mROA.Benchmark/RequestWriter.cs

@@ -0,0 +1,57 @@
+using System.Formats.Cbor;
+using BenchmarkDotNet.Attributes;
+using mROA.Implementation;
+
+[MemoryDiagnoser]
+public class RequestWriter
+{
+    private const int N = 1000;
+    public RequestId Id = RequestId.Generate();
+    private CborWriter _writer;
+
+    public RequestWriter()
+    {
+        _writer = new CborWriter(initialCapacity: 512);
+    }
+        
+    [Benchmark(Baseline = true)]
+    public int DefaultCbor()
+    {
+        _writer.Reset();
+        _writer.WriteByteString(Id.ToByteArray());
+        return _writer.BytesWritten;
+    }
+    [Benchmark]
+    public int DirectCbor()
+    {
+        _writer.Reset();
+        Id.WriteToCbor(_writer);
+        return _writer.BytesWritten;
+    }
+    
+    [Benchmark]
+    public int Stackalloc()
+    {
+        _writer.Reset();
+        Span<byte> span = stackalloc byte[16];
+        Id.WriteToDest(span);
+        _writer.WriteByteString(span);
+        return _writer.BytesWritten;
+    }
+    
+    [Benchmark]
+    public int DirectCborInline()
+    {
+        _writer.Reset();
+        Id.WriteToCborInline(_writer);
+        return _writer.BytesWritten;
+    }
+    
+    [Benchmark]
+    public int DirectCborOpt()
+    {
+        _writer.Reset();
+        Id.WriteToCborOpt(_writer);
+        return _writer.BytesWritten;
+    }
+}