Re: pgsql: Add documentation for the JIT feature.

On Thursday, March 29, 2018, Andres Freund <andres(at)anarazel(dot)de> wrote:

> On 2018-03-29 13:26:31 -0400, Robert Haas wrote:
>
> > Also, in a way, you could argue that v10 already did "compilation of
> > expressions". It didn't compile them to machine language, true, but
> > it translated them into a form which is faster to execute, and which
> > is at least arguably a form of bytecode. It's not going to be clear,
> > even to an expert, that "compilation of expressions" means something
> > other than that, but if you say JIT, then all of a sudden people know
> > what we're talking about.
> >
> > I agree that JIT is jargon, but it's pretty commonly-used jargon.
>
> Precisely this. I'm very strongly against just saying "expression
> compilation", it's just too imprecise. As Robert mentions it could refer
> to what we do in v10, it could refer to ahead of time compilation of PL
> functions, and it doesn't include compiling tuple deforming. Nor will
> it describe compiling sorting, copy or whatnot.
>
> I'm very open however to replacing JITing with JIT compiling and smilar
> substitutions.
>
>
FWIW "JIT expression compilation" is comprehensible and precise to me.

David J.