diff --git a/crates/epaint/src/mesh.rs b/crates/epaint/src/mesh.rs
index fbff16ba2cd..8a0a3949530 100644
--- a/crates/epaint/src/mesh.rs
+++ b/crates/epaint/src/mesh.rs
@@ -169,9 +169,7 @@ impl Mesh {
     /// Add a triangle.
     #[inline(always)]
     pub fn add_triangle(&mut self, a: u32, b: u32, c: u32) {
-        self.indices.push(a);
-        self.indices.push(b);
-        self.indices.push(c);
+        self.indices.extend_from_slice(&[a, b, c]);
     }
 
     /// Make room for this many additional triangles (will reserve 3x as many indices).
@@ -189,33 +187,35 @@ impl Mesh {
     }
 
     /// Rectangle with a texture and color.
+    #[inline(always)]
     pub fn add_rect_with_uv(&mut self, rect: Rect, uv: Rect, color: Color32) {
         #![allow(clippy::identity_op)]
-
         let idx = self.vertices.len() as u32;
-        self.add_triangle(idx + 0, idx + 1, idx + 2);
-        self.add_triangle(idx + 2, idx + 1, idx + 3);
-
-        self.vertices.push(Vertex {
-            pos: rect.left_top(),
-            uv: uv.left_top(),
-            color,
-        });
-        self.vertices.push(Vertex {
-            pos: rect.right_top(),
-            uv: uv.right_top(),
-            color,
-        });
-        self.vertices.push(Vertex {
-            pos: rect.left_bottom(),
-            uv: uv.left_bottom(),
-            color,
-        });
-        self.vertices.push(Vertex {
-            pos: rect.right_bottom(),
-            uv: uv.right_bottom(),
-            color,
-        });
+        self.indices
+            .extend_from_slice(&[idx + 0, idx + 1, idx + 2, idx + 2, idx + 1, idx + 3]);
+
+        self.vertices.extend_from_slice(&[
+            Vertex {
+                pos: rect.left_top(),
+                uv: uv.left_top(),
+                color,
+            },
+            Vertex {
+                pos: rect.right_top(),
+                uv: uv.right_top(),
+                color,
+            },
+            Vertex {
+                pos: rect.left_bottom(),
+                uv: uv.left_bottom(),
+                color,
+            },
+            Vertex {
+                pos: rect.right_bottom(),
+                uv: uv.right_bottom(),
+                color,
+            },
+        ]);
     }
 
     /// Uniformly colored rectangle.