I have this C library that interacts with some hardware over the network that
produces a ton of data. It tells me up front the maximum size the data might be
so I can allocate a buffer for it, then does a bunch of network requests
downloading that data into the buffer, then tells me when it's done and what
the final, smaller size is.
Thanks to previous discussions on the list, I settled on using a [UInt8] as the
buffer, because it let me avoid various .withUnsafePointer{} calls (I need the
unsafe buffer pointer to live outside the scope of the closures).
Unfortunately, When I go to shrink the buffer to its final size with:
self.dataBuffer = Array(self.dataBuffer![0 ..< finalBufferSize])
This ends up taking over 2 minutes to complete (on an iPad Pro).
finalBufferSize is very large, 240 MB, but I think it's doing a very naive copy.
I've since worked around this problem, but is there any way to improve on this?
Thanks,
--
Rick Mann
rm...@latencyzero.com
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