Reviewers: Yang,
Message:
PTAL
Description:
Speed up native error check.
BUG=148757
TEST=largeObj test from the bug is 2x faster.
[email protected]
Please review this at https://chromiumcodereview.appspot.com/11377100/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/api.cc
Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index
4820f9d57f385a1c1c49e6fbc2765c60128ca542..e86430776d4d8ca30bf27e348caae58830231e91
100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -2309,7 +2309,11 @@ static i::Object* LookupBuiltin(i::Isolate* isolate,
static bool CheckConstructor(i::Isolate* isolate,
i::Handle<i::JSObject> obj,
const char* class_name) {
- return obj->map()->constructor() == LookupBuiltin(isolate, class_name);
+ i::Object* constr = obj->map()->constructor();
+ if (!constr->IsJSFunction()) return false;
+ i::JSFunction* func = i::JSFunction::cast(constr);
+ return func->shared()->native() &&
+ constr == LookupBuiltin(isolate, class_name);
}
--
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