On Thu, Mar 12, 2009 at 3:17 PM, Peter Ammon <pam...@apple.com> wrote: > > Hi John, > > Instead of storing each string individually into the heap, try batching up, > say, 1k or so into a stack allocated buffer. Then use > objc_memmove_collectable() to move them in bulk into the heap at the point > your stack allocated buffer gets full, or your scan finishes. >
I actually did give this a shot, or something close to it. I tried using just the stack (swapping NSAllocateCollectable() with alloca()), but no joy- exactly the same times came out. Good call though. The problem is objc_assign_strongCast(), which surprisingly doesn't seem to have a 'fast path' escape if it detects a write to an address on the stack. I would have figured that at least the main threads stack bounds would have been accounted for (I would be surprised if this wasn't immutable once the linker handed off execution to the program), as this really amounts to nothing more than a >= <= check, but nope. _______________________________________________ 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
