serialization benchmark improvements

csharp/src/Google.Protobuf.Benchmarks/BenchmarkDatasetConfig.cs

@@ -43,20 +43,20 @@ namespace Google.Protobuf.Benchmarks
     /// <summary>
     /// The configuration for a single serialization test, loaded from a dataset.
     /// </summary>
-    public class SerializationConfig
+    public class BenchmarkDatasetConfig
     {
         private static readonly Dictionary<string, MessageParser> parsersByMessageName = 
-            typeof(SerializationBenchmark).Assembly.GetTypes()
+            typeof(GoogleMessageBenchmark).Assembly.GetTypes()
                 .Where(t => typeof(IMessage).IsAssignableFrom(t))
                 .ToDictionary(
                     t => ((MessageDescriptor) t.GetProperty("Descriptor", BindingFlags.Static | BindingFlags.Public).GetValue(null)).FullName,
                     t => ((MessageParser) t.GetProperty("Parser", BindingFlags.Static | BindingFlags.Public).GetValue(null)));
 
         public MessageParser Parser { get; }
-        public IEnumerable<ByteString> Payloads { get; }
+        public List<byte[]> Payloads { get; }
         public string Name { get; }
 
-        public SerializationConfig(string resource)
+        public BenchmarkDatasetConfig(string resource, string shortName = null)
         {
             var data = LoadData(resource);
             var dataset = BenchmarkDataset.Parser.ParseFrom(data);
@@ -66,13 +66,13 @@ namespace Google.Protobuf.Benchmarks
                 throw new ArgumentException($"No parser for message {dataset.MessageName} in this assembly");
             }
             Parser = parser;
-            Payloads = dataset.Payload;
-            Name = dataset.Name;
+            Payloads = new List<byte[]>(dataset.Payload.Select(p => p.ToByteArray()));
+            Name = shortName ?? dataset.Name;
         }
 
         private static byte[] LoadData(string resource)
         {
-            using (var stream = typeof(SerializationBenchmark).Assembly.GetManifestResourceStream($"Google.Protobuf.Benchmarks.{resource}"))
+            using (var stream = typeof(GoogleMessageBenchmark).Assembly.GetManifestResourceStream($"Google.Protobuf.Benchmarks.{resource}"))
             {
                 if (stream == null)
                 {

csharp/src/Google.Protobuf.Benchmarks/GoogleMessageBenchmark.cs

@@ -38,23 +38,27 @@ using System.Linq;
 namespace Google.Protobuf.Benchmarks
 {
     /// <summary>
-    /// Benchmark for serializing (to a MemoryStream) and deserializing (from a ByteString).
+    /// Benchmark for serializing and deserializing of standard datasets that are also
+    /// measured by benchmarks in other languages.
     /// Over time we may wish to test the various different approaches to serialization and deserialization separately.
+    /// See https://github.com/protocolbuffers/protobuf/blob/master/benchmarks/README.md
+    /// See https://github.com/protocolbuffers/protobuf/blob/master/docs/performance.md
     /// </summary>
     [MemoryDiagnoser]
-    public class SerializationBenchmark
+    public class GoogleMessageBenchmark
     {
         /// <summary>
-        /// All the configurations to be tested. Add more datasets to the array as they're available.
+        /// All the datasets to be tested. Add more datasets to the array as they're available.
         /// (When C# supports proto2, this will increase significantly.)
         /// </summary>
-        public static SerializationConfig[] Configurations => new[]
+        public static BenchmarkDatasetConfig[] DatasetConfigurations => new[]
         {
-            new SerializationConfig("dataset.google_message1_proto3.pb")
+            // short name is specified to make results table more readable
+            new BenchmarkDatasetConfig("dataset.google_message1_proto3.pb", "goog_msg1_proto3")
         };
 
-        [ParamsSource(nameof(Configurations))]
-        public SerializationConfig Configuration { get; set; }
+        [ParamsSource(nameof(DatasetConfigurations))]
+        public BenchmarkDatasetConfig Dataset { get; set; }
 
         private MessageParser parser;
         /// <summary>
@@ -67,8 +71,8 @@ namespace Google.Protobuf.Benchmarks
         [GlobalSetup]
         public void GlobalSetup()
         {
-            parser = Configuration.Parser;
-            subTests = Configuration.Payloads.Select(p => new SubTest(p, parser.ParseFrom(p))).ToList();
+            parser = Dataset.Parser;
+            subTests = Dataset.Payloads.Select(p => new SubTest(p, parser.ParseFrom(p))).ToList();
         }
 
         [Benchmark]
@@ -78,7 +82,7 @@ namespace Google.Protobuf.Benchmarks
         public void ToByteArray() => subTests.ForEach(item => item.ToByteArray());
 
         [Benchmark]
-        public void ParseFromByteString() => subTests.ForEach(item => item.ParseFromByteString(parser));
+        public void ParseFromByteArray() => subTests.ForEach(item => item.ParseFromByteArray(parser));
 
         [Benchmark]
         public void ParseFromStream() => subTests.ForEach(item => item.ParseFromStream(parser));
@@ -87,13 +91,13 @@ namespace Google.Protobuf.Benchmarks
         {
             private readonly Stream destinationStream;
             private readonly Stream sourceStream;
-            private readonly ByteString data;
+            private readonly byte[] data;
             private readonly IMessage message;
 
-            public SubTest(ByteString data, IMessage message)
+            public SubTest(byte[] data, IMessage message)
             {
                 destinationStream = new MemoryStream(data.Length);
-                sourceStream = new MemoryStream(data.ToByteArray());
+                sourceStream = new MemoryStream(data);
                 this.data = data;
                 this.message = message;
             }
@@ -108,7 +112,7 @@ namespace Google.Protobuf.Benchmarks
 
             public void ToByteArray() => message.ToByteArray();
 
-            public void ParseFromByteString(MessageParser parser) => parser.ParseFrom(data);
+            public void ParseFromByteArray(MessageParser parser) => parser.ParseFrom(data);
 
             public void ParseFromStream(MessageParser parser)
             {