This should be a strict renaming with identical codegen. Touches a bunch of code and needs a solid eyeballing. Waldo to the rescue :)
Comment on attachment 431241 [details] [diff] [review] patch Since you're here, can you add JSObject::isSlowArray as a sibling to isDenseArray, and call it from inside JSObject::isArray? This seems like an appropriate time to do it, and I'll want it for a couple patches pretty soon.