On 10/31/24 09:15, Alex Shinn wrote:
> So we
> are left with the dilemma: array-broadcast is an efficient
> way to broadcast without copying data, but we require the
> input to it to be copied (or to have been immutable to begin
> with which is not always practical).

That's true.

It seems that arrays are usually broadcast to expand a small array to
match a larger array by repeating the elements of the small array.  So
the argument to array-broadcast usually has many fewer entries compared
to the result, and to the domains of the other arrays in the operation.

Given this, I don't see a real big problem with copying this smaller
argument array if necessary before broadcast.

Brad