On Mon, Jun 9, 2014 at 4:12 PM, Dmitriy Lyubimov <[email protected]> wrote:
> One open question i had was,well, since the outlined approach avoids > logical plans still for in-core matrix, it would be difficult to optimize > the expressions in this context (i.e. figure out best-working _output_ > structure). > This is the single biggest flaw that I see. To do higher level optimizations, the lower levels have to expose costs for possible plans. Taking a major whack at the local cases for element-wise and matrix multiply is still a good thing to do.
