> On Oct 1, 2015, at 12:02 AM, Ben <ben_cocoa_dev_l...@yahoo.co.uk> wrote: > > Using NSString's drawInRect:withAttributes: wants a Swift dictionary of > attributes. Instruments showed a lot of time spend accessing the elements of > this dictionary and converting back to Objective-C land. > Converting the string to be drawn to an NSAttributedString and adding > attributes to it directly before drawing with drawInRect: resulted in string > drawing dropping from ~65% of drawRect time to ~50%.
Ah, that's interesting. So just passing a Swift Dictionary to an API that takes an NSDictionary triggers an expensive conversion. Sort of disheartening, at least to me (I spend more time than most of you having to worry about low-level performance issues.) —Jens _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
