[swift-users] UnsafeMutablePointer on the stack?

[Jens Alfke]

> On Oct 2, 2016, at 5:14 PM, Mike Ferenduros via swift-users <swift-users at swift.org> wrote:
> 
> Personally I would be surprised if the malloc caused an actual measurable performance hit tbh.

It won’t be noticeable against a call to SecRandom, as noted, but there are other circumstances where it’s a big performance hit to put a temporary buffer on the heap. (Right now I’m working on some rather performance-sensitive database code in C++ where avoiding a few heap allocations per iteration has proven to be a big win.)

Does Swift have any solution for allocating stack-based array buffers?

—Jens
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