On Tue, Mar 19, 2019 at 12:23 PM John Naylor <john.nay...@2ndquadrant.com> wrote: > On Sun, Feb 24, 2019 at 5:03 PM Alexander Korotkov > <a.korot...@postgrespro.ru> wrote: > > On Wed, Jan 30, 2019 at 5:28 AM Andres Freund <and...@anarazel.de> wrote: > > > Why -CF, and why is -p repeated? > > > > BTW, for our SQL grammar we have > > > > > scan.c: FLEXFLAGS = -CF -p -p > > > > Is it kind of default? > > I just saw this in the committed patch. This is not default, it's > chosen for maximum performance at the expense of binary/memory size. > That's fine, but with a little effort you can also make the scanner > non-backtracking for additional performance, as in the attached.
We're working on patchset improving flex scanner. Already have similar change among the others. But thanks a lot for your attention! ------ Alexander Korotkov Postgres Professional: http://www.postgrespro.com The Russian Postgres Company
