On Jul 14, 2014, at 1:07 PM, Carl Hoefs <newsli...@autonomy.caltech.edu> wrote:
> modifiableData = [ NSMutableData dataWithData: [ external call that gives
> me an NSData ] ];
It’s shorter and more idiomatic to just say
modifiableData = [external mutableCopy];
(plus an autorelease if you’re not using ARC)
> Will get it working first, and if there's a performance panic, perhaps
> something can be done (but I extremely doubt it).
Well, the most optimal thing to do would be to create an empty NSMutableData of
the correct size, then use memcpy to copy in the correct pieces from the
original NSData and whatever other sources there are. That will save you some
unnecessary copies and possibly realloc calls.
—Jens
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