Improve performance.

Tests/MQTTnet.Core.Tests/AsyncLock_Tests.cs

@@ -17,7 +17,7 @@ namespace MQTTnet.Tests
             var @lock = new AsyncLock();
             for (var i = 0; i < 100; i++)
             {
-                using (await @lock.WaitAsync().ConfigureAwait(false))
+                using (await @lock.WaitAsync(CancellationToken.None).ConfigureAwait(false))
                 {
                     sum++;
                 }
@@ -33,7 +33,7 @@ namespace MQTTnet.Tests
             var @lock = new AsyncLock();
 
             // This call will never "release" the lock due to missing _using_.
-            await @lock.WaitAsync().ConfigureAwait(false);
+            await @lock.WaitAsync(CancellationToken.None).ConfigureAwait(false);
 
             using (var cts = new CancellationTokenSource(TimeSpan.FromSeconds(3)))
             {

Tests/MQTTnet.TestApp.NetCore/MQTTnet.TestApp.NetCore.csproj

@@ -21,4 +21,10 @@
     <ProjectReference Include="..\..\Source\MQTTnet\MQTTnet.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="Start.bat">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

Tests/MQTTnet.TestApp.NetCore/PerformanceTest.cs

@@ -67,8 +67,7 @@ namespace MQTTnet.TestApp.NetCore
                     {
                         Server = "127.0.0.1"
                     },
-                    CleanSession = true,
-                    //KeepAlivePeriod = TimeSpan.FromSeconds(1)
+                    CleanSession = true
                 };
 
                 var client = new MqttFactory().CreateMqttClient();

Tests/MQTTnet.TestApp.NetCore/Start.bat

@@ -0,0 +1 @@
+dotnet MQTTnet.TestApp.NetCore.dll