On Mon, Dec 12, 2016 at 6:14 PM, Andres Freund <and...@anarazel.de> wrote: > > > For Q1 I think the bigger win is JITing the transition function > invocation in advance_aggregates/transition_function - that's IIRC where > the biggest bottleneck lies. >
Yeah, we bundle the agg core into our expr work... no point otherwise since we do it for OLAP. As for experience, I think you have found out for yourself. There is a lot that can be done and heuristics are involved in many places to decide whether to jit fully, partially, or not at all. But it looks like you have a solid basis now to proceed and explore the beyond :-) Send me private email if you have a particular question. Regards, -cktan
