Re: WIP: Faster Expression Processing and Tuple Deforming (including JIT)

On 2016-12-06 14:35:43 -0600, Nico Williams wrote:
> On Tue, Dec 06, 2016 at 12:27:51PM -0800, Andres Freund wrote:
> > On 2016-12-06 14:19:21 -0600, Nico Williams wrote:
> > > > I concur with your feeling that hand-rolled JIT is right out.  But
> > > 
> > > Yeah, that way lies maintenance madness.
> > 
> > I'm not quite that sure about that. I had a lot of fun doing some
> > hand-rolled x86 JITing. Not that is a ward against me being mad.  But
> > more seriously: Manually doing a JIT gives you a lot faster compilation
> > times, which makes JIT applicable in a lot more situations.
> 
> What I meant is that each time there are new ISA extensions, or
> differences in how relevant/significant different implementations of the
> same ISA implement certain instructions, and/or every time you want to
> add a new architecture... someone has to do a lot of very low-level
> work.

Yea, that's why I didn't pursue this path further. I *personally* think
it'd be perfectly fine to only support JITing on linux x86_64 and
aarch64 for now. And those I'd be willing to work on. But since I know
that's not project policy...

- Andres