The benchmark bot uses this functionality today to run the benchmarks. By
default build-script only uses 3 samples for each test. Given the noise on our
systems, this is definitely not sufficient for any sort of robust numbers.
Using this patch, I am going to change the benchmarking bot to take the minimum
of 20 samples as we do for our internal benchmarking. This should help make the
benchmark bot give better data. This will have as a cost cause the bot to take
more time. The testing time issue can be solved down the line by changing to a
protocol where we first do tests with a small number of samples (< 5). Then any
benchmark with a delta > 5% is rerun with 20 samples or perhaps until a
statistical criterion is satisfied. But until that is implemented, this at least
makes the bot useful.
There are other things that need to be changed on the benchmarking bot as well,
namely that it should build on a separate machine from which it is running the
benchmarks on. The benchmarking machine should be quiet and not have any work
being done on it. But that is also for another time.
From the Swift documentation:
"If you define an optional variable without providing a default value,
the variable is automatically set to nil for you."
It replaces String initializers taking Character or UnicodeScalar as a repeating value by a more general initializer that takes a String as a repeating value. This is done to avoid the ambiguities in the current String API, which can be only resolved by explicit casting.
String.append(_:UnicodeScalar) APIs is also removed to match these changes.
* Migrate from `UnsafePointer<Void>` to `UnsafeRawPointer`.
As proposed in SE-0107: UnsafeRawPointer.
`void*` imports as `UnsafeMutableRawPointer`.
`const void*` imports as `UnsafeRawPointer`.
Occurrences of `UnsafePointer<Void>` are replaced with UnsafeRawPointer.
* Migrate overlays from UnsafePointer<Void> to UnsafeRawPointer.
This requires explicit memory binding in several places,
particularly in NSData and CoreAudio.
* Fix a bunch of test cases for Void->Raw migration.
* qsort takes IUO values
* Bridge `Unsafe[Mutable]RawPointer as `void [const] *`.
* Parse #dsohandle as UnsafeMutableRawPointer
* Update a bunch of test cases for Void->Raw migration.
* Trivial fix for the SceneKit test case.
* Add an UnsafeRawPointer self initializer.
This is unfortunately necessary for assignment between types imported from C.
* Tiny simplification of the initializer.
* Migrate from `UnsafePointer<Void>` to `UnsafeRawPointer`.
As proposed in SE-0107: UnsafeRawPointer.
`void*` imports as `UnsafeMutableRawPointer`.
`const void*` imports as `UnsafeRawPointer`.
Occurrences of `UnsafePointer<Void>` are replaced with UnsafeRawPointer.
* Migrate overlays from UnsafePointer<Void> to UnsafeRawPointer.
This requires explicit memory binding in several places,
particularly in NSData and CoreAudio.
* Fix a bunch of test cases for Void->Raw migration.
* qsort takes IUO values
* Bridge `Unsafe[Mutable]RawPointer as `void [const] *`.
* Parse #dsohandle as UnsafeMutableRawPointer
* Update a bunch of test cases for Void->Raw migration.
* Trivial fix for the SceneKit test case.
* Add an UnsafeRawPointer self initializer.
This is unfortunately necessary for assignment between types imported from C.
* Tiny simplification of the initializer.
