Reply To: Metadata

Now that it’s filed as part of the filing for the Execution talk, let me introduce you to the “alternate” op:
alternate(a, b)->{c,d}
where a/b/c/d are vectors. For example using 4 element vectors, where a is {a0, a1, a2, a3} and b is {b0, b1, b2, b3}, c is {a0, b0, a1, b1} and d is {a2, b2, a3, b3}.

Reduction is logN stages with an alternate between stages.