Employ .NET [Auto]Vectorization features

[Mrnikbobjeff]

Description

I took a look at MaciOS Platformcanvas.cs and noticed that we do some in theory vectorizable operations here. With the advent of System.Numerics.TensorPrimitives/VectorXXX we should get some free speedups for little cost. I assume there are other instances where this holds, so this servers as an entry point to optimize different instances of vectorizable code.

Public API Changes

None

Intended Use-Case

Improved code generation employing intrinsics depending on ISA

[Mrnikbobjeff]

maui/src/Compatibility/Core/src/WPF/Microsoft.Windows.Shell/Standard/Utilities.cs

Line 32 in b16a118

private static bool _MemCmp(IntPtr left, IntPtr right, long cb)

exhibits several of these issues with their manual memcompare

[Xyncgas]

who's using a _MemCmp function in Microsoft.Windows.Shell.Standard.Utilities.cs I wonder