Re: JIT compiling with LLVM v9.0

Hi,

I've spent the last weeks working on my LLVM compilation patchset. In
the course of that I *heavily* revised it. While still a good bit away
from committable, it's IMO definitely not a prototype anymore.

 

Below are results on my system for Q1 TPC-H scale 10 (~13Gb database)

Options	Time
Default	20075
jit_expressions=on	16105
jit_tuple_deforming=on	14734
jit_perform_inlining=on	13441

Also I noticed that parallel execution didsables JIT.
At my computer with 4 cores time of Q1 with parallel execution is 6549.
Are there any principle problems with combining JIT and parallel execution?

-- 
Konstantin Knizhnik
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company