Mechanism for blocks that don't need explicit copy

[mormj]

Such as head - operate as a probe on a buffer of sorts.

Need the mechanism to do this without requiring the memcpy inside the block Applies to other blocks that just reinterpret vector lengths and such but don't change the data

[mormj]

Perhaps connect these types of blocks as normal, but have them marked as "inplace" or "nocopy", then lump them with the previous block when the buffers get created