We're going to replace StdlibUnittest's use of ContiguousArray with
_UnitTestArray so that we can work on (and potentially break)
_ContiguousArray and still get useful test results. When refactoring is
complete, we can optionally replace StdlibUnittest's use of
_UnitTestArray with ContiguousArray, or move the decoupled component
into the StdlibUnittest module.
Swift SVN r22874
Buffer identity is only used by tests. The switch to an identity
representation that accounts for the buffer length was actually
incorrect for the way many tests used it.
Swift SVN r22771
Fixes rdar://problem/18646425
Running the test uncovered avoidable inefficiencies in Array copying, so
dispatch of _copyToNativeArrayBuffer was revamped. It's reasonable to
expect some speedups from this.
Also, the internal Array API requestNativeBuffer was highly error prone
when the source was a Slice, because it could return an array buffer
that represented more than the entire slice. That capability was
probably used for optimization once, but is no longer, and the error
prone API probably caused bugs, so it was reformed.
Swift SVN r22746
This decreases total testing time by over a minute on my old Mac Pro.
It probably has much less effect on systems with fewer cores, but shouldn't
be any worse there.
Swift SVN r22745
