Avoid WriteBarrier assign for nulling struct

src/Http/Http.Features/src/FeatureReferences.cs

@@ -15,6 +15,20 @@ public FeatureReferences(IFeatureCollection collection)
             Revision = collection.Revision;
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Initalize(IFeatureCollection collection)
+        {
+            Revision = collection.Revision;
+            Collection = collection;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Initalize(IFeatureCollection collection, int revision)
+        {
+            Revision = revision;
+            Collection = collection;
+        }
+
         public IFeatureCollection Collection { get; private set; }
         public int Revision { get; private set; }
 

src/Http/Http/src/DefaultHttpContext.cs

@@ -40,18 +40,19 @@ public DefaultHttpContext()
 
         public DefaultHttpContext(IFeatureCollection features)
         {
-            _features = new FeatureReferences<FeatureInterfaces>(features);
+            _features.Initalize(features);
             _request = new DefaultHttpRequest(this);
             _response = new DefaultHttpResponse(this);
         }
 
         public void Initialize(IFeatureCollection features)
         {
-            _features = new FeatureReferences<FeatureInterfaces>(features);
-            _request.Initialize();
-            _response.Initialize();
-            _connection?.Initialize(features);
-            _websockets?.Initialize(features);
+            var revision = features.Revision;
+            _features.Initalize(features, revision);
+            _request.Initialize(revision);
+            _response.Initialize(revision);
+            _connection?.Initialize(features, revision);
+            _websockets?.Initialize(features, revision);
         }
 
         public void Uninitialize()

src/Http/Http/src/Features/QueryFeature.cs

@@ -34,7 +34,7 @@ public QueryFeature(IFeatureCollection features)
                 throw new ArgumentNullException(nameof(features));
             }
 
-            _features = new FeatureReferences<IHttpRequestFeature>(features);
+            _features.Initalize(features);
         }
 
         private IHttpRequestFeature HttpRequestFeature =>

src/Http/Http/src/Features/RequestCookiesFeature.cs

@@ -35,7 +35,7 @@ public RequestCookiesFeature(IFeatureCollection features)
                 throw new ArgumentNullException(nameof(features));
             }
 
-            _features = new FeatureReferences<IHttpRequestFeature>(features);
+            _features.Initalize(features);
         }
 
         private IHttpRequestFeature HttpRequestFeature =>

src/Http/Http/src/Features/ResponseCookiesFeature.cs

@@ -46,7 +46,7 @@ public ResponseCookiesFeature(IFeatureCollection features, ObjectPool<StringBuil
                 throw new ArgumentNullException(nameof(features));
             }
 
-            _features = new FeatureReferences<IHttpResponseFeature>(features);
+            _features.Initalize(features);
         }
 
         private IHttpResponseFeature HttpResponseFeature => _features.Fetch(ref _features.Cache, _nullResponseFeature);

src/Http/Http/src/Internal/DefaultConnectionInfo.cs

@@ -25,7 +25,12 @@ public DefaultConnectionInfo(IFeatureCollection features)
 
         public void Initialize( IFeatureCollection features)
         {
-            _features = new FeatureReferences<FeatureInterfaces>(features);
+            _features.Initalize(features);
+        }
+
+        public void Initialize(IFeatureCollection features, int revision)
+        {
+            _features.Initalize(features, revision);
         }
 
         public void Uninitialize()

src/Http/Http/src/Internal/DefaultHttpRequest.cs

@@ -28,12 +28,17 @@ public sealed class DefaultHttpRequest : HttpRequest
         public DefaultHttpRequest(DefaultHttpContext context)
         {
             _context = context;
-            _features = new FeatureReferences<FeatureInterfaces>(_context.Features);
+            _features.Initalize(context.Features);
         }
 
         public void Initialize()
         {
-            _features = new FeatureReferences<FeatureInterfaces>(_context.Features);
+            _features.Initalize(_context.Features);
+        }
+
+        public void Initialize(int revision)
+        {
+            _features.Initalize(_context.Features, revision);
         }
 
         public void Uninitialize()

src/Http/Http/src/Internal/DefaultHttpResponse.cs

@@ -25,12 +25,17 @@ public sealed class DefaultHttpResponse : HttpResponse
         public DefaultHttpResponse(DefaultHttpContext context)
         {
             _context = context;
-            _features = new FeatureReferences<FeatureInterfaces>(_context.Features);
+            _features.Initalize(context.Features);
         }
 
         public void Initialize()
         {
-            _features = new FeatureReferences<FeatureInterfaces>(_context.Features);
+            _features.Initalize(_context.Features);
+        }
+
+        public void Initialize(int revision)
+        {
+            _features.Initalize(_context.Features, revision);
         }
 
         public void Uninitialize()

src/Http/Http/src/Internal/DefaultWebSocketManager.cs

@@ -25,7 +25,12 @@ public DefaultWebSocketManager(IFeatureCollection features)
 
         public void Initialize(IFeatureCollection features)
         {
-            _features = new FeatureReferences<FeatureInterfaces>(features);
+            _features.Initalize(features);
+        }
+
+        public void Initialize(IFeatureCollection features, int revision)
+        {
+            _features.Initalize(features, revision);
         }
 
         public void Uninitialize()