Manually implement GetHashCode on Vector4Double and Vector4Triple

[gamma-delta]

For value types, GetHashCode() provides a default hash code implementation that uses reflection. You should consider overriding it for better performance.

Source

In my experiments this makes generating a mesh for a 6x6x6x1 grid of unit hypercubes go from ~3 seconds to 0.006 seconds!

[HackerPoet]

Thanks, I've just tested this and it indeed seems to have a major speedup in mesh generation. I had no idea that this wasn't the default behavior in C#. I'll add this in the next release.