Remember and reuse derived map for external arrays

src/factory.cc

Index: src/factory.cc
diff --git a/src/factory.cc b/src/factory.cc
index d798c3ede65b34d4dd860aeafc0e9ebe28e26a89..18006e5e7210a35e1e3df8119c934f4d515ff14f 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -392,8 +392,13 @@ Handle<Map> Factory::GetSlowElementsMap(Handle<Map> src) {
 }
 
 
-Handle<Map> Factory::NewExternalArrayElementsMap(Handle<Map> src) {
-  CALL_HEAP_FUNCTION(isolate(), src->NewExternalArrayElementsMap(), Map);
+Handle<Map> Factory::GetExternalArrayElementsMap(
+    Handle<Map> src,
+    ExternalArrayType array_type,
+    bool safe_to_add_transition) {
+  CALL_HEAP_FUNCTION(isolate(), src->GetExternalArrayElementsMap(

[Mads Ager (chromium), 2011/03/22 18:57:25]

I would prefer a different indentation here. How about:

CALL_HEAP_FUNCTION(isolate(),
                   src->GetExternalArrayElementsMap(array_type,
                                                    safe_to_add_transition),
                   Map);

Or something like that?
 

[danno, 2011/03/23 09:56:52]

Done.

+      array_type,
+      safe_to_add_transition), Map);
 }