Jordan Rose says in the comment on SR-4499 that Dmitri no longer works on Swift. Who owns that part of code now?
Also, who is able to answer my original questions from this thread? --Pavol On Wed, 5 Apr 2017 at 18:56, Pavol Vaskovic <p...@pali.sk> wrote: > On Wednesday, 5 April 2017 at 16:04, rintaro ishizaki wrote: > > Just FYI > > > > Implementation of Type Erasers > > > https://lists.swift.org/pipermail/swift-dev/Week-of-Mon-20160905/002852.html > > Thanks for that link! > > This looks like a followup to Chris’s question, so I’m pinging Dmitri to > chime in on this. > > Bug report: https://bugs.swift.org/browse/SR-4499 > > > > For a reproducer, see the benchmark for `run_SuffixAnySequence` - that is > utterly dominated by wending elements from the underlying sequence using > generic witness table. There is no specialization occurring at all. As I’ve > reasoned in my original e-mail, this is understandable - semantics of > _AnyIteratorBox used in AnyIterator’s `next` method require virtual > dispatch. > > Closure based approach to type erasure should’t have such a semantic > barrier for optimization - the limit would probably just be currently > conservative optimization? > > Best regards > Pavol Vaskovic >
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