Add basic benchmark project for Activity based SDK. (#725)

* Add basic benchmark project for Activity based SDK.

* readme separate

OpenTelemetry.sln

@@ -81,6 +81,9 @@ EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OpenTelemetry.Shims.OpenTracing.Tests", "test\OpenTelemetry.Shims.OpenTracing.Tests\OpenTelemetry.Shims.OpenTracing.Tests.csproj", "{49A7853F-5B6F-4B65-A781-7D29A1C92164}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "benchmarks", "benchmarks", "{0169B149-FB8B-46F4-9EF7-8A0E69F8FAAF}"
+	ProjectSection(SolutionItems) = preProject
+		benchmarks\readme.md = benchmarks\readme.md
+	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Benchmarks", "benchmarks\Benchmarks.csproj", "{CEB7F146-81DC-41DB-8015-140EC6A64E6C}"
 EndProject

benchmarks/OpenTelemetrySdkBenchmarksActivity.cs

@@ -0,0 +1,56 @@
+// <copyright file="OpenTelemetrySdkBenchmarksActivity.cs" company="OpenTelemetry Authors">
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using System.Diagnostics;
+using BenchmarkDotNet.Attributes;
+using Benchmarks.Tracing;
+using OpenTelemetry.Trace.Configuration;
+
+namespace Benchmarks
+{
+    [MemoryDiagnoser]
+    public class OpenTelemetrySdkBenchmarksActivity
+    {
+        private readonly ActivitySource BenchMarkSource = new ActivitySource("BenchMark");
+
+        public OpenTelemetrySdkBenchmarksActivity()
+        {
+            // Not configuring pipeline, which will result in default NoOpActivityProcessor.
+            var openTel = OpenTelemetrySdk.EnableOpenTelemetry(
+                (builder) => builder.AddActivitySource("BenchMark")
+                );
+        }
+
+        [Benchmark]
+        public Activity CreateActivity_NoOpProcessor()
+        {
+            return ActivityCreationScenarios.CreateActivity(this.BenchMarkSource);
+        }
+
+
+        [Benchmark]
+        public Activity CreateActivity_WithAttributes_NoOpProcessor()
+        {
+            return ActivityCreationScenarios.CreateActivityWithAttributes(this.BenchMarkSource);
+        }
+
+        [Benchmark]
+        public Activity CreateActivity_WithAttributesAndCustomProp_NoOpProcessor()
+        {
+            return ActivityCreationScenarios.CreateActivityWithAttributesAndCustomProperty(this.BenchMarkSource);
+        }
+    }
+}

benchmarks/Tracing/ActivityCreationScenarios.cs

@@ -0,0 +1,54 @@
+// <copyright file="ActivityCreationScenarios.cs" company="OpenTelemetry Authors">
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using System.Diagnostics;
+using OpenTelemetry.Trace;
+
+namespace Benchmarks.Tracing
+{
+    internal class ActivityCreationScenarios
+    {
+        public static Activity CreateActivity(ActivitySource source)
+        {
+            var activity = source.StartActivity("name");
+            activity?.Stop();
+            return activity;
+        }
+
+        public static Activity CreateActivityWithAttributes(ActivitySource source)
+        {
+            var activity = source.StartActivity("name");
+            activity?.AddTag("tag1", "value1");
+            activity?.AddTag("tag2", "value2");
+            activity?.AddTag("customPropTag1", "somecustomValue");
+            activity?.Stop();
+            return activity;
+        }
+
+        public static Activity CreateActivityWithAttributesAndCustomProperty(ActivitySource source)
+        {
+            var activity = source.StartActivity("name");
+            activity?.AddTag("tag1", "value1");
+            activity?.AddTag("tag2", "value2");
+
+            // use custom property instead of tags
+            // activity?.AddTag("customPropTag1", "somecustomValue");
+            activity?.SetCustomProperty("customPropTag1", "somecustomValue");
+            activity?.Stop();
+            return activity;
+        }
+    }
+}

benchmarks/readme.md

@@ -0,0 +1,5 @@
+Use the following example to run Benchmarks from command line:
+(change parameters as necessary)
+
+1. navigate to opentelemetry-dotnet\src\benchmarks directory and run the following
+2. dotnet run --framework netcoreapp3.1 --configuration Release --filter *OpenTelemetrySdkBenchmarksActivity*