On Aug 22, 2013, at 12:05 PM, Thomas Wetmore wrote: > Steve, > > Sorry, again I was unclear. Here is what I am trying to say: > > Pre-allocation means to allocate space before you need it, which would be at > init time. > > But there is no need to pre-allocate -- the first allocation can be postponed > until the first item is put in the container or characters in the string. > > I assume the capacity argument is used at that first allocation. > > Pre-allocation and the capacity argument are wholly orthogonal concepts.
I googled around and found a post at StackOverflow (http://stackoverflow.com/questions/8636983/what-is-the-best-way-to-initialize-nsmutablestring-object) that links to the open-source implementation of CFString. From there you can see what the optimization technique is, although I didn't notice *when* it allocates. Keary Suska Esoteritech, Inc. "Demystifying technology for your home or business" _______________________________________________ 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
