nickbabcock/Farmhash.Sharp

Investigate Spans

nickbabcock opened this issue · 2 comments

nickbabcock commented

I'm afraid that grabbing the next 64bits in a Span won't be as efficient as:

ulong Fetch64(byte* p) => *(ulong*)p

Even though a Span is a contiguous area of memory, I'm not sure if there's an operation that is as similarly optimized as pointers.

nickbabcock commented

Actually, it may be doable.

  1. Wait for .NET Core 2.1
  2. Use MemoryMarshal.GetReference, to get a reference to the first element of the span.
  3. Unsafe.As cast from reference to pointer.
  4. Use the byte* methods
nickbabcock commented

Added in 0.6