Replace AddProperty by AddNamedProperty to speed up the common case

src/typedarray.js

Index: src/typedarray.js
diff --git a/src/typedarray.js b/src/typedarray.js
index ab5fc5c9e37f707c028286e42c74b4628f83bfa1..c149b35b98e8926094ae7054b977bc29aed2ee10 100644
--- a/src/typedarray.js
+++ b/src/typedarray.js
@@ -299,13 +299,13 @@ macro SETUP_TYPED_ARRAY(ARRAY_ID, NAME, ELEMENT_SIZE)
   %SetCode(global.NAME, NAMEConstructor);
   %FunctionSetPrototype(global.NAME, new $Object());
 
-  %AddProperty(global.NAME, "BYTES_PER_ELEMENT", ELEMENT_SIZE,
-               READ_ONLY | DONT_ENUM | DONT_DELETE);
-  %AddProperty(global.NAME.prototype,
-               "constructor", global.NAME, DONT_ENUM);
-  %AddProperty(global.NAME.prototype,
-               "BYTES_PER_ELEMENT", ELEMENT_SIZE,
-               READ_ONLY | DONT_ENUM | DONT_DELETE);
+  %AddNamedProperty(global.NAME, "BYTES_PER_ELEMENT", ELEMENT_SIZE,
+                    READ_ONLY | DONT_ENUM | DONT_DELETE);
+  %AddNamedProperty(global.NAME.prototype,
+                    "constructor", global.NAME, DONT_ENUM);
+  %AddNamedProperty(global.NAME.prototype,
+                    "BYTES_PER_ELEMENT", ELEMENT_SIZE,
+                    READ_ONLY | DONT_ENUM | DONT_DELETE);
   InstallGetter(global.NAME.prototype, "buffer", NAME_GetBuffer);
   InstallGetter(global.NAME.prototype, "byteOffset", NAME_GetByteOffset);
   InstallGetter(global.NAME.prototype, "byteLength", NAME_GetByteLength);
@@ -436,7 +436,7 @@ function SetupDataView() {
   %FunctionSetPrototype($DataView, new $Object);
 
   // Set up constructor property on the DataView prototype.
-  %AddProperty($DataView.prototype, "constructor", $DataView, DONT_ENUM);
+  %AddNamedProperty($DataView.prototype, "constructor", $DataView, DONT_ENUM);
 
   InstallGetter($DataView.prototype, "buffer", DataViewGetBufferJS);
   InstallGetter($DataView.prototype, "byteOffset", DataViewGetByteOffset);