diff --git a/Benchmarking/Benchmark/Benchmark.csproj b/Benchmarking/Benchmark/Benchmark.csproj
index 475449a..051d009 100644
--- a/Benchmarking/Benchmark/Benchmark.csproj
+++ b/Benchmarking/Benchmark/Benchmark.csproj
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.12.0" />
-    <PackageReference Include="Capnp.Net.Runtime" Version="1.3.33-g596a97a362" />
+    <PackageReference Include="Capnp.Net.Runtime" Version="1.3.34-g409e517587" />
     <PackageReference Include="CapnpC.CSharp.MsBuild.Generation" Version="1.2.138" />
     <PackageReference Include="Google.Protobuf" Version="3.11.3" />
     <PackageReference Include="Grpc.Net.Client" Version="2.27.0" />
diff --git a/Benchmarking/CapnpProfile/CapnpProfile.csproj b/Benchmarking/CapnpProfile/CapnpProfile.csproj
index fb4935e..953f368 100644
--- a/Benchmarking/CapnpProfile/CapnpProfile.csproj
+++ b/Benchmarking/CapnpProfile/CapnpProfile.csproj
@@ -12,7 +12,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Capnp.Net.Runtime" Version="1.3.30-g1649067ef6" />
+    <PackageReference Include="Capnp.Net.Runtime" Version="1.3.34-g409e517587" />
     <PackageReference Include="CapnpC.CSharp.MsBuild.Generation" Version="1.3.29-g6d711b8579" />
   </ItemGroup>
 
diff --git a/Benchmarking/CapnpProfile/Program.cs b/Benchmarking/CapnpProfile/Program.cs
index 758884f..274bb97 100644
--- a/Benchmarking/CapnpProfile/Program.cs
+++ b/Benchmarking/CapnpProfile/Program.cs
@@ -11,8 +11,10 @@ namespace CapnpProfile
     {
         static async Task Main(string[] args)
         {
-            using var server = new TcpRpcServer(IPAddress.Any, 5002);
+            using var server = new TcpRpcServer();
             server.Main = new CapnpEchoService();
+            server.AddBuffering();
+            server.StartAccepting(IPAddress.Any, 5002);
             using var client = new TcpRpcClient("localhost", 5002);
             await client.WhenConnected;
             using var echoer = client.GetMain<IEchoer>();
diff --git a/Benchmarking/EchoServiceCapnp/EchoServiceCapnp.csproj b/Benchmarking/EchoServiceCapnp/EchoServiceCapnp.csproj
index 0b9048a..2ef80ba 100644
--- a/Benchmarking/EchoServiceCapnp/EchoServiceCapnp.csproj
+++ b/Benchmarking/EchoServiceCapnp/EchoServiceCapnp.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Capnp.Net.Runtime" Version="1.3.33-g596a97a362" />
+    <PackageReference Include="Capnp.Net.Runtime" Version="1.3.34-g409e517587" />
     <PackageReference Include="CapnpC.CSharp.MsBuild.Generation" Version="1.2.138" />
   </ItemGroup>
 
diff --git a/Benchmarking/EchoServiceCapnp/Program.cs b/Benchmarking/EchoServiceCapnp/Program.cs
index c6ca4fa..62c408b 100644
--- a/Benchmarking/EchoServiceCapnp/Program.cs
+++ b/Benchmarking/EchoServiceCapnp/Program.cs
@@ -9,10 +9,11 @@ namespace EchoServiceCapnp
     {
         static void Main(string[] args)
         {
-            using (var server = new TcpRpcServer(IPAddress.Any, 5002))
+            using (var server = new TcpRpcServer())
             {
                 server.AddBuffering();
                 server.Main = new CapnpEchoService();
+                server.StartAccepting(IPAddress.Any, 5002);
                 Console.WriteLine("Press RETURN to stop listening");
                 Console.ReadLine();
             }
diff --git a/Capnp.Net.Runtime/Util/DuplexBufferedStream.cs b/Capnp.Net.Runtime/Util/DuplexBufferedStream.cs
index 11e3f06..2bf3001 100644
--- a/Capnp.Net.Runtime/Util/DuplexBufferedStream.cs
+++ b/Capnp.Net.Runtime/Util/DuplexBufferedStream.cs
@@ -5,7 +5,9 @@ namespace Capnp.Util
 {
     internal class DuplexBufferedStream : Stream
     {
-        const int DefaultBufferSize = 4096;
+        // A buffer size of 1024 bytes seems to be a good comprise, giving good performance 
+        // in TCP/IP-over-localhost scenarios for small to medium (200kiB) frame sizes.
+        const int DefaultBufferSize = 1024;
 
         readonly BufferedStream _readStream;
         readonly BufferedStream _writeStream;