The standard library has grown significantly, and we need a new
directory structure that clearly reflects the role of the APIs, and
allows future growth.
See stdlib/{public,internal,private}/README.txt for more information.
Swift SVN r25876
The new modules are:
* SwiftUnstable -- assorted additions to the core standard library
(more algorithms etc.)
* SwiftUnstableDarwinExtras -- proposed additions to the Darwin overlay,
not yet reviewed by the Darwin team.
* SwiftUnstablePthreadExtras -- wrappers that make it possible to
use pthread in Swift (they work around the lack of block-based API in
pthread). In future these could be possibly folded into the Darwin
overlay as well.
These APIs are useful without StdlibUnittest for writing automation
tools in Swift. Just like SwiftExperimental, none of these modules are
exposed to extrenal users.
Also, since these new modules can be compiled with -sil-serialize-all
(unlike StdlibUnittest, where we can't apply the flag because of
compiler bugs), standard library tests that need to run optimized code
(like AtomicInt.swift) are *much* faster now.
Swift SVN r25679
This function mixes the bits in the hash value, which improves Dictionary
performance for keys with bad hashes.
PrecommitBenchmark changes with greater than 7% difference:
``````````Dictionary2`,```1456.00`,```1508.00`,```1502.00`,````624.00`,````607.00`,````592.00`,`864.00`,``145.9%
``````````Dictionary3`,```1379.00`,```1439.00`,```1408.00`,````585.00`,````567.00`,````552.00`,`827.00`,``149.8%
````````````Histogram`,````850.00`,````849.00`,````851.00`,```1053.00`,```1049.00`,```1048.00`,`199.00`,``-19.0%
````````````````Prims`,```1999.00`,```2005.00`,```2018.00`,```1734.00`,```1689.00`,```1701.00`,`310.00`,```18.4%
``````````StrSplitter`,```2365.00`,```2334.00`,```2316.00`,```1979.00`,```1997.00`,```2000.00`,`337.00`,```17.0%
```````````````TwoSum`,```1551.00`,```1568.00`,```1556.00`,```1771.00`,```1741.00`,```1716.00`,`165.00`,```-9.6%
Regressions are in benchmarks that use `Int` as dictionary key: we are just
doing more work than previously (hashing an `Int` was an identity function).
rdar://17962402
Swift SVN r21142
