ClonedArguments should not materialize its special properties unless they are being changed or deleted
Created attachment 271082 [details] Patch
Created attachment 271085 [details] Benchmark results
Comment on attachment 271082 [details] Patch Clearing flags on attachment: 271082 Committed r196644: <http://trac.webkit.org/changeset/196644>
All reviewed patches have been landed. Closing bug.