diff --git a/lib/ui/compositing.dart b/lib/ui/compositing.dart
index 06906ed50b972..8b3f98c821106 100644
--- a/lib/ui/compositing.dart
+++ b/lib/ui/compositing.dart
@@ -98,7 +98,7 @@ class SceneBuilder extends NativeFieldWrapperClass2 {
   EngineLayer pushClipRRect(RRect rrect, {Clip clipBehavior = Clip.antiAlias}) {
     assert(clipBehavior != null);
     assert(clipBehavior != Clip.none);
-    return _pushClipRRect(rrect._value32, clipBehavior.index);
+    return _pushClipRRect(rrect._value, clipBehavior.index);
   }
   EngineLayer _pushClipRRect(Float32List rrect, int clipBehavior) native 'SceneBuilder_pushClipRRect';
 
diff --git a/lib/ui/geometry.dart b/lib/ui/geometry.dart
index f326c1ecbdc74..2e8a79980c2dc 100644
--- a/lib/ui/geometry.dart
+++ b/lib/ui/geometry.dart
@@ -666,9 +666,7 @@ class Rect {
   }
 
   static const int _kDataSize = 4;
-  final Float64List _value = new Float64List(_kDataSize);
-
-  Float32List get _value32 => Float32List.fromList(_value);
+  final Float32List _value = new Float32List(_kDataSize);
 
   /// The offset of the left edge of this rectangle from the x axis.
   double get left => _value[0];
@@ -1159,11 +1157,9 @@ class RRect {
   }
 
   static const int _kDataSize = 12;
-  final Float64List _value = new Float64List(_kDataSize);
+  final Float32List _value = new Float32List(_kDataSize);
   RRect _scaled; // same RRect with scaled radii per side
 
-  Float32List get _value32 => Float32List.fromList(_value);
-
   /// The offset of the left edge of this rectangle from the x axis.
   double get left => _value[0];
 
diff --git a/lib/ui/painting.dart b/lib/ui/painting.dart
index 79adb4f818d46..6703dfd01083e 100644
--- a/lib/ui/painting.dart
+++ b/lib/ui/painting.dart
@@ -2028,7 +2028,7 @@ class Path extends NativeFieldWrapperClass2 {
   /// argument.
   void addRRect(RRect rrect) {
     assert(_rrectIsValid(rrect));
-    _addRRect(rrect._value32);
+    _addRRect(rrect._value);
   }
   void _addRRect(Float32List rrect) native 'Path_addRRect';
 
@@ -3259,7 +3259,7 @@ class Canvas extends NativeFieldWrapperClass2 {
   void clipRRect(RRect rrect, {bool doAntiAlias = true}) {
     assert(_rrectIsValid(rrect));
     assert(doAntiAlias != null);
-    _clipRRect(rrect._value32, doAntiAlias);
+    _clipRRect(rrect._value, doAntiAlias);
   }
   void _clipRRect(Float32List rrect, bool doAntiAlias) native 'Canvas_clipRRect';
 
@@ -3336,7 +3336,7 @@ class Canvas extends NativeFieldWrapperClass2 {
   void drawRRect(RRect rrect, Paint paint) {
     assert(_rrectIsValid(rrect));
     assert(paint != null);
-    _drawRRect(rrect._value32, paint._objects, paint._data);
+    _drawRRect(rrect._value, paint._objects, paint._data);
   }
   void _drawRRect(Float32List rrect,
                   List<dynamic> paintObjects,
@@ -3351,7 +3351,7 @@ class Canvas extends NativeFieldWrapperClass2 {
     assert(_rrectIsValid(outer));
     assert(_rrectIsValid(inner));
     assert(paint != null);
-    _drawDRRect(outer._value32, inner._value32, paint._objects, paint._data);
+    _drawDRRect(outer._value, inner._value, paint._objects, paint._data);
   }
   void _drawDRRect(Float32List outer,
                    Float32List inner,
@@ -3651,7 +3651,7 @@ class Canvas extends NativeFieldWrapperClass2 {
     }
 
     final Int32List colorBuffer = colors.isEmpty ? null : _encodeColorList(colors);
-    final Float32List cullRectBuffer = cullRect?._value32;
+    final Float32List cullRectBuffer = cullRect?._value;
 
     _drawAtlas(
       paint._objects, paint._data, atlas, rstTransformBuffer, rectBuffer,
@@ -3698,7 +3698,7 @@ class Canvas extends NativeFieldWrapperClass2 {
 
     _drawAtlas(
       paint._objects, paint._data, atlas, rstTransforms, rects,
-      colors, blendMode.index, cullRect?._value32
+      colors, blendMode.index, cullRect?._value
     );
   }