On 3 Nov 2017, at 19:42, Jens Alfke via swift-users <[email protected]>
wrote:
> Any way to pass the bytes directly to String without an intermediate copy?
You can do this with `UnsafeBufferPointer`. For example:
extension String {
init?(bytes: UnsafePointer<UInt8>, count: Int) {
let bp = UnsafeBufferPointer(start: bytes, count: count)
self.init(bytes: bp, encoding: .utf8)
}
}
I don’t know if this is faster.
There are lots of different ways to achieve your two goals and I wouldn’t even
start optimising this without a realistic model of what your strings look like
in practice, and a performance test based on that model.
Share and Enjoy
--
Quinn "The Eskimo!" <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
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