op_spread should profile its operand 
https://bugs.webkit.org/show_bug.cgi?id=171198
Summary op_spread should profile its operand
Saam Barati
Reported 2017-04-23 10:45:30 PDT
If we had a good idea of what type of array was being spread, we could emit a CheckStructure in such a way that we could emit more efficient machine code for the spread. We'd also be able to prove it could be spread fast (e.g, not observable iterator protocol).
Attachments
Add attachment proposed patch, testcase, etc.
Note You need to log in before you can comment on or make changes to this bug.