On April 18, 2018 12:16:35 PM PDT, Robert Haas <robertmh...@gmail.com> wrote: >On Wed, Apr 18, 2018 at 11:50 AM, Andres Freund <and...@anarazel.de> >wrote: >> JIT has cost, and sometimes it's not beneficial. Here our heuristics >> when to JIT appear to be a bit off. In the parallel world it's worse >> because the JITing is duplicated for parallel workers atm. > >It seems like you're describing it as if the JIT just didn't produce >gains sufficient to make up for the cost of doing it, but that's not >really the issue here AFAICS. Here the JIT actually made code that >run slower than the un-JIT-ted code. That seems like a different sort >of problem.
Not convinced that that is true - the issue is more likely that JIT work in workers is counted as execute time... Gotta add that somehow, not sure what the best way would be. -- Sent from my Android device with K-9 Mail. Please excuse my brevity.
