I presented today at iOSDevUK in Aberystwyth with some more material on Swift Performance and how to profile Swift. Also on wrapping classes in value types. Unfortunately much of the presentation was a demo and there is no video but I'm posting the materials here and will try to make a follow up post covering some more of the details in the next week or two (no promises).

Slides (note that slides a terrible communication mechanism and caveats and subtleties in the talk may be lost):

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My demo completely failed (Mac locked up when connecting to the projector) so I couldn't show what I wanted. If you want to try the demos yourself these are the Github branches I was going show. All these are 70 pixel square calculations for consistent comparison the main master branch increases in later versions.

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