diff --git a/kubi-ui/examples/test.rs b/kubi-ui/examples/test.rs
index 7c7fe19..83d4fb9 100644
--- a/kubi-ui/examples/test.rs
+++ b/kubi-ui/examples/test.rs
@@ -51,7 +51,7 @@ fn main() {
               gap: 1.,
               elements: {
                 let mut elements: Vec<Box<dyn UiElement>> = vec![];
-                for i in 0..100 {
+                for i in 0..10000 {
                   elements.push(Box::new(ProgressBar {
                     value: (instant.elapsed().as_secs_f32() + (i as f32 / 10.)).sin().powi(2),
                     size: (UiSize::Auto, UiSize::Pixels(5.)),
diff --git a/kubi/src/rendering/primitives/cube.rs b/kubi/src/rendering/primitives/cube.rs
index 297dcb1..20f8616 100644
--- a/kubi/src/rendering/primitives/cube.rs
+++ b/kubi/src/rendering/primitives/cube.rs
@@ -59,25 +59,25 @@ pub(super) fn init_cube_primitive(
   display: NonSendSync<UniqueView<Renderer>>
 ) {
   {
-    let vert = VertexBuffer::new(
+    let vert = VertexBuffer::immutable(
       &display.display,
       CUBE_VERTICES
     ).unwrap();
-    let index = IndexBuffer::new(
+    let index = IndexBuffer::immutable(
       &display.display,
-      PrimitiveType::TrianglesList, 
+      PrimitiveType::TrianglesList,
       CUBE_INDICES
     ).unwrap();
     storages.add_unique_non_send_sync(CubePrimitive(vert, index));
   }
   {
-    let vert = VertexBuffer::new(
+    let vert = VertexBuffer::immutable(
       &display.display,
       CENTERED_CUBE_VERTICES
     ).unwrap();
-    let index = IndexBuffer::new(
+    let index = IndexBuffer::immutable(
       &display.display,
-      PrimitiveType::TrianglesList, 
+      PrimitiveType::TrianglesList,
       CUBE_INDICES
     ).unwrap();
     storages.add_unique_non_send_sync(CenteredCubePrimitive(vert, index));
diff --git a/kubi/src/rendering/primitives/rect.rs b/kubi/src/rendering/primitives/rect.rs
index 0215d14..3a30575 100644
--- a/kubi/src/rendering/primitives/rect.rs
+++ b/kubi/src/rendering/primitives/rect.rs
@@ -18,13 +18,13 @@ pub(super) fn init_rect_primitive(
   storages: AllStoragesView,
   display: NonSendSync<UniqueView<Renderer>>
 ) {
-  let vert = VertexBuffer::new(
+  let vert = VertexBuffer::immutable(
     &display.display,
     RECT_VERTEX
   ).unwrap();
-  let index = IndexBuffer::new(
+  let index = IndexBuffer::immutable(
     &display.display,
-    PrimitiveType::TrianglesList, 
+    PrimitiveType::TrianglesList,
     RECT_INDEX
   ).unwrap();
   storages.add_unique_non_send_sync(RectPrimitive(vert, index));