v12.0.0

• Target framework upgraded from netcoreapp3.1 to net5.0; this allows use of some new API surface in net5 which improves performance in places.

• The redzen assembly is no longer strong named, as this is no longer necessary or helpful within a dotnet core runtime environment.

• The following classes, interfaces, and methods have been 'spanified':

  • TimSort{T}, TimSort{K,V}, TimSort{K,V,W}
  • IntroSort{K,V,W}
  • SortUtils
  • NumericsUtils
  • Base64EncodingOutputStream
  • ISampler, IStatelessSampler
  • MemoryBlockStream
  • NonClosingStreamWrapper.

• TimSort: Replaced BinarySort() method with a simple InsertionSort() method that performs much better.

• IntroSort{K,V,W} performance tweaks.

• Added MathSpan.Min(), Max() for double, float, and Int32.

• Added MathSpan.SumOfSquares() for double, float values.

• Added MathSpan Int32 overloads.

• EnumerableUtils.RangeRandomOrder() now gets a temp array from ArrayPool (to reduce memory allocs and garbage collection).

• Added DiscreteDistribution.SingleOutcome singleton field.

• FileByteArray now uses smaller buffer size.

• DefaultRandomSeedSource: Sealed the class. Use stackalloc for obaining crypto random bytes. Integer arithmetic using bitshifts (performance tweak).

• Rename: NumericsUtils.ProbabilisticRound() to StochasticRound().

• Rename: CalculateMedian() to Median(), and moved from NumericsUtils to MathSpan.

• Rename: DoubleCircularBufferWithStats to CircularBufferWithStats.

• Fix: MathUtils.Log2Ceiling(uint) gave incorrect results when the high bit was set.

• MathUtils.IsPowerOfTwo() implementions changed to use BitOperations.PopCount() instead of arithmetic trick (performance tweak).

• IRandomSource.NextBytes(Span{byte}) implementations reimplemented to use modern faster techniques for populating 8 bytes at a time (approx. 7% performance boost)

• SpanUtils.Equals{T}() renamed to Equal{T}().

• Multiple other small fixes and improvements; see repository git history for full details.