[typedarrays] sort in C++ for undefined comparefn

src/js/typedarray.js

Index: src/js/typedarray.js
diff --git a/src/js/typedarray.js b/src/js/typedarray.js
index 3777507235ef603a74c655a6f52560d4259d510f..ef1c1d29e711981220eb97b439b0e1ae0286f5a1 100644
--- a/src/js/typedarray.js
+++ b/src/js/typedarray.js
@@ -517,25 +517,6 @@ function TypedArrayReverse() {
   return PackedArrayReverse(this, length);
 }
 
-
-function TypedArrayComparefn(x, y) {
-  if (x === 0 && x === y) {
-    x = 1 / x;
-    y = 1 / y;
-  }
-  if (x < y) {
-    return -1;
-  } else if (x > y) {
-    return 1;
-  } else if (NUMBER_IS_NAN(x) && NUMBER_IS_NAN(y)) {
-    return NUMBER_IS_NAN(y) ? 0 : 1;
-  } else if (NUMBER_IS_NAN(x)) {
-    return 1;
-  }
-  return 0;
-}
-
-
 // ES6 draft 05-18-15, section 22.2.3.25
 function TypedArraySort(comparefn) {
   if (!IS_TYPEDARRAY(this)) throw %make_type_error(kNotTypedArray);
@@ -543,7 +524,7 @@ function TypedArraySort(comparefn) {
   var length = %_TypedArrayGetLength(this);
 
   if (IS_UNDEFINED(comparefn)) {
-    comparefn = TypedArrayComparefn;
+    return %TypedArraySortFast(this);
   }
 
   return InnerArraySort(this, length, comparefn);