diff --git a/js/MatrixOps3.js b/js/MatrixOps3.js
index e58f795..a72d38e 100644
--- a/js/MatrixOps3.js
+++ b/js/MatrixOps3.js
@@ -24,7 +24,7 @@ const SQRT_HALF = Math.sqrt( 0.5 );
 
 const MatrixOps3 = {
   // use typed arrays if possible
-  Array: dot.FastArray,
+  Array: window.Float64Array ? window.Float64Array : window.Array,
 
   /*---------------------------------------------------------------------------*
    * 3x3 matrix math
diff --git a/js/dot.js b/js/dot.js
index 5833f60..04eb295 100644
--- a/js/dot.js
+++ b/js/dot.js
@@ -6,8 +6,5 @@ import Namespace from '../../phet-core/js/Namespace.js';
 
 const dot = new Namespace( 'dot' );
 
-// TODO: performance: check browser speed to compare how fast this is. We may need to add a 32 option for GL ES. https://github.com/phetsims/dot/issues/96
-dot.register( 'FastArray', window.Float64Array ? window.Float64Array : window.Array );
-
 // will be filled in by other modules
 export default dot;
\ No newline at end of file