diff --git a/encompass-cs/Collections/ComponentStore.cs b/encompass-cs/Collections/ComponentStore.cs
index b081f99..60396ea 100644
--- a/encompass-cs/Collections/ComponentStore.cs
+++ b/encompass-cs/Collections/ComponentStore.cs
@@ -6,7 +6,7 @@ namespace Encompass
 {
     internal class ComponentStore
     {
-        private Dictionary<Type, TypedComponentStore> Stores = new Dictionary<Type, TypedComponentStore>();
+        private Dictionary<Type, TypedComponentStore> Stores = new Dictionary<Type, TypedComponentStore>(512);
 
         public IEnumerable<(Type, TypedComponentStore)> StoresEnumerable()
         {
diff --git a/encompass-cs/Collections/TypedComponentStore.cs b/encompass-cs/Collections/TypedComponentStore.cs
index 6392739..cb84a6d 100644
--- a/encompass-cs/Collections/TypedComponentStore.cs
+++ b/encompass-cs/Collections/TypedComponentStore.cs
@@ -15,8 +15,8 @@ namespace Encompass
 
     internal class TypedComponentStore<TComponent> : TypedComponentStore where TComponent : struct, IComponent
     {
-        private readonly Dictionary<Entity, TComponent> store = new Dictionary<Entity, TComponent>();
-        private readonly Dictionary<Entity, int> priorities = new Dictionary<Entity, int>();
+        private readonly Dictionary<Entity, TComponent> store = new Dictionary<Entity, TComponent>(128);
+        private readonly Dictionary<Entity, int> priorities = new Dictionary<Entity, int>(128);
 
         public override int Count { get => store.Count; }
 
diff --git a/encompass-cs/ComponentMessageManager.cs b/encompass-cs/ComponentMessageManager.cs
index 9c37d0b..2d93a1a 100644
--- a/encompass-cs/ComponentMessageManager.cs
+++ b/encompass-cs/ComponentMessageManager.cs
@@ -13,7 +13,7 @@ namespace Encompass
         private readonly ComponentStore pendingComponentStore = new ComponentStore();
         private ComponentStore upToDateComponentStore = new ComponentStore();
 
-        private readonly Dictionary<Type, Dictionary<Entity, int>> typeToEntityToPendingComponentPriority = new Dictionary<Type, Dictionary<Entity, int>>();
+        private readonly Dictionary<Type, Dictionary<Entity, int>> typeToEntityToPendingComponentPriority = new Dictionary<Type, Dictionary<Entity, int>>(128);
 
         public ComponentStore UpToDateComponentStore { get => upToDateComponentStore; }
 
diff --git a/encompass-cs/DrawLayerManager.cs b/encompass-cs/DrawLayerManager.cs
index c116bb7..9785987 100644
--- a/encompass-cs/DrawLayerManager.cs
+++ b/encompass-cs/DrawLayerManager.cs
@@ -8,10 +8,10 @@ namespace Encompass
     {
         private readonly SortedList<int, int> layerOrder = new SortedList<int, int>();
 
-        private readonly Dictionary<int, ComponentStore> layerIndexToComponentStore = new Dictionary<int, ComponentStore>();
-        private readonly Dictionary<int, HashSet<GeneralRenderer>> layerIndexToGeneralRenderers = new Dictionary<int, HashSet<GeneralRenderer>>();
+        private readonly Dictionary<int, ComponentStore> layerIndexToComponentStore = new Dictionary<int, ComponentStore>(512);
+        private readonly Dictionary<int, HashSet<GeneralRenderer>> layerIndexToGeneralRenderers = new Dictionary<int, HashSet<GeneralRenderer>>(512);
 
-        private readonly Dictionary<Type, Dictionary<Entity, int>> typeToEntityToLayer = new Dictionary<Type, Dictionary<Entity, int>>();
+        private readonly Dictionary<Type, Dictionary<Entity, int>> typeToEntityToLayer = new Dictionary<Type, Dictionary<Entity, int>>(512);
 
         public IEnumerable<int> LayerOrder { get { return layerOrder.Values; } }
 
diff --git a/encompass-cs/EntityManager.cs b/encompass-cs/EntityManager.cs
index fa96910..2d33f31 100644
--- a/encompass-cs/EntityManager.cs
+++ b/encompass-cs/EntityManager.cs
@@ -7,9 +7,9 @@ namespace Encompass
 {
     internal class EntityManager
     {
-        private readonly Dictionary<Guid, Entity> IDToEntity = new Dictionary<Guid, Entity>();
+        private readonly Dictionary<Guid, Entity> IDToEntity = new Dictionary<Guid, Entity>(1024);
 
-        private readonly HashSet<Entity> entitiesMarkedForDestroy = new HashSet<Entity>();
+        private readonly HashSet<Entity> entitiesMarkedForDestroy = new HashSet<Entity>(256);
 
         private readonly ComponentManager componentManager;
 
diff --git a/encompass-cs/RenderManager.cs b/encompass-cs/RenderManager.cs
index 07d4a46..bb271e9 100644
--- a/encompass-cs/RenderManager.cs
+++ b/encompass-cs/RenderManager.cs
@@ -10,7 +10,7 @@ namespace Encompass
         private readonly DrawLayerManager drawLayerManager;
         private readonly EntityManager entityManager;
 
-        private readonly Dictionary<Type, Action<Entity, IComponent>> drawComponentTypeToOrderedRenderer = new Dictionary<Type, Action<Entity, IComponent>>();
+        private readonly Dictionary<Type, Action<Entity, IComponent>> drawComponentTypeToOrderedRenderer = new Dictionary<Type, Action<Entity, IComponent>>(256);
 
         public RenderManager(
             ComponentManager componentManager,