More JSON variants

Author: DamianEdwards

src/BenchmarksApps/TechEmpower/Kestrel/BenchmarkApp.cs

@@ -1,4 +1,5 @@
 using System.Buffers;
+using System.Text;
 using System.Text.Json;
 using Microsoft.AspNetCore.Hosting.Server;
 using Microsoft.AspNetCore.Http.Features;
@@ -22,6 +23,8 @@ public Task ProcessRequestAsync(IFeatureCollection features)
         {
             "/plaintext" => Plaintext(res, features),
             "/json" => Json(res, features),
+            "/json-string" => JsonString(res, features),
+            "/json-utf8bytes" => JsonUtf8Bytes(res, features),
             "/json-chunked" => JsonChunked(res, features),
             "/" => Index(res, features),
             _ => NotFound(res, features),
@@ -78,6 +81,40 @@ private static async Task JsonChunked(IHttpResponseFeature res, IFeatureCollecti
         await body.Writer.FlushAsync();
     }
 
+    private static async Task JsonString(IHttpResponseFeature res, IFeatureCollection features)
+    {
+        res.StatusCode = StatusCodes.Status200OK;
+        res.Headers.ContentType = "application/json; charset=utf-8";
+
+        var message = JsonSerializer.Serialize(new JsonMessage { message = "Hello, World!" }, _jsonSerializerOptions);
+        res.Headers.ContentLength = Encoding.UTF8.GetByteCount(message);
+
+        var body = features.GetResponseBodyFeature();
+        await body.StartAsync();
+
+        Span<byte> buffer = stackalloc byte[256];
+        var length = Encoding.UTF8.GetBytes(message, buffer);
+        body.Writer.Write(buffer[..length]);
+
+        await body.Writer.FlushAsync();
+    }
+
+    private static async Task JsonUtf8Bytes(IHttpResponseFeature res, IFeatureCollection features)
+    {
+        res.StatusCode = StatusCodes.Status200OK;
+        res.Headers.ContentType = "application/json; charset=utf-8";
+
+        var messageBytes = JsonSerializer.SerializeToUtf8Bytes(new JsonMessage { message = "Hello, World!" }, _jsonSerializerOptions);
+        res.Headers.ContentLength = messageBytes.Length;
+
+        var body = features.GetResponseBodyFeature();
+        await body.StartAsync();
+
+        body.Writer.Write(messageBytes);
+
+        await body.Writer.FlushAsync();
+    }
+
     private static readonly ObjectPoolProvider _objectPoolProvider = new DefaultObjectPoolProvider();
     private static readonly ObjectPool<ArrayBufferWriter<byte>> _bufferWriterPool = _objectPoolProvider.Create<ArrayBufferWriter<byte>>();
     private static readonly ObjectPool<Utf8JsonWriter> _jsonWriterPool = _objectPoolProvider.Create(new Utf8JsonWriterPooledObjectPolicy());

src/BenchmarksApps/TechEmpower/Kestrel/kestrel.benchmarks.yml

@@ -36,6 +36,24 @@ scenarios:
         presetHeaders: json
         path: /json
 
+  json-string:
+    application:
+      job: kestrel
+    load:
+      job: wrk
+      variables:
+        presetHeaders: json
+        path: /json-string
+
+  json-utf8bytes:
+    application:
+      job: kestrel
+    load:
+      job: wrk
+      variables:
+        presetHeaders: json
+        path: /json-utf8bytes
+
   json-chunked:
     application:
       job: kestrel