diff --git a/src/Components/Components/src/CascadingValue.cs b/src/Components/Components/src/CascadingValue.cs
index 626dc89833..db03b3d416 100644
--- a/src/Components/Components/src/CascadingValue.cs
+++ b/src/Components/Components/src/CascadingValue.cs
@@ -168,7 +168,7 @@ namespace Microsoft.AspNetCore.Components
             _subscribers.Remove(subscriber);
         }
 
-        private void NotifySubscribers(ParameterViewLifetime lifetime)
+        private void NotifySubscribers(in ParameterViewLifetime lifetime)
         {
             foreach (var subscriber in _subscribers)
             {
diff --git a/src/Components/Components/src/ParameterView.cs b/src/Components/Components/src/ParameterView.cs
index 8dafe9c2c5..33f87a5062 100644
--- a/src/Components/Components/src/ParameterView.cs
+++ b/src/Components/Components/src/ParameterView.cs
@@ -28,12 +28,12 @@ namespace Microsoft.AspNetCore.Components
         private readonly int _ownerIndex;
         private readonly IReadOnlyList<CascadingParameterState> _cascadingParametersOrNull;
 
-        internal ParameterView(ParameterViewLifetime lifetime, RenderTreeFrame[] frames, int ownerIndex)
+        internal ParameterView(in ParameterViewLifetime lifetime, RenderTreeFrame[] frames, int ownerIndex)
             : this(lifetime, frames, ownerIndex, null)
         {
         }
 
-        private ParameterView(ParameterViewLifetime lifetime, RenderTreeFrame[] frames, int ownerIndex, IReadOnlyList<CascadingParameterState> cascadingParametersOrNull)
+        private ParameterView(in ParameterViewLifetime lifetime, RenderTreeFrame[] frames, int ownerIndex, IReadOnlyList<CascadingParameterState> cascadingParametersOrNull)
         {
             _lifetime = lifetime;
             _frames = frames;
diff --git a/src/Components/Components/src/Rendering/ComponentState.cs b/src/Components/Components/src/Rendering/ComponentState.cs
index 08ff8cafc4..dc372424b9 100644
--- a/src/Components/Components/src/Rendering/ComponentState.cs
+++ b/src/Components/Components/src/Rendering/ComponentState.cs
@@ -157,7 +157,7 @@ namespace Microsoft.AspNetCore.Components.Rendering
             _renderer.AddToPendingTasks(Component.SetParametersAsync(parameters));
         }
 
-        public void NotifyCascadingValueChanged(ParameterViewLifetime lifetime)
+        public void NotifyCascadingValueChanged(in ParameterViewLifetime lifetime)
         {
             var directParams = _latestDirectParametersSnapshot != null
                 ? new ParameterView(lifetime, _latestDirectParametersSnapshot.Buffer, 0)
diff --git a/src/Components/Components/src/Rendering/RenderBatchBuilder.cs b/src/Components/Components/src/Rendering/RenderBatchBuilder.cs
index fcb118e09a..d4223bbce2 100644
--- a/src/Components/Components/src/Rendering/RenderBatchBuilder.cs
+++ b/src/Components/Components/src/Rendering/RenderBatchBuilder.cs
@@ -3,7 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Threading;
 using Microsoft.AspNetCore.Components.RenderTree;
 
 namespace Microsoft.AspNetCore.Components.Rendering