Le 22 sept. 2010 à 14:46, Oleg Krupnov a écrit : > Hi, > > I have a NSMutableArray and need to add a number of elements to it, > and their quantity I know in advance (in fact, they come from another > array). > > I think that if I add them one-by-one in a loop, the array will have > to reallocate its internal memory frequently. This seems inefficient. > > I'd like to avoid this and instead have the array to re-allocate its > memory only once to increment the capacity by the known value. > > I could use "arrayWithCapacity" creation method, but the array already > exists. It seems that the -addObjectsFromArray: method may be what I > need, but the docs do not make it clear if it's internally optimized > to do only a single memory re-allocation. Have anyone tested this?
Is this part of your code a bottleneck ? If not, use the simplest way (-addObjectsFromArray:) and don't bother with premature optimization. -- Jean-Daniel _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
