Re: Inlining of couple of functions in pl_exec.c improves performance

I did some performance testing on 0001+0002 here, and found that
for me, there's basically no change on x86_64 but a win of 2 to 3
percent on aarch64, using Pavel's pi_est_1() as a representative
case for simple plpgsql statements. That squares with your original
results I believe. It's not clear to me whether any of the later
tests in this thread measured these changes in isolation, or only
with 0003 added.

Anyway, that's good enough for me, so I pushed 0001+0002 after a
little bit of additional cosmetic tweaking.

I attach your original 0003 here (it still applies, with some line
offsets). That's just so the cfbot doesn't get confused about what
it's supposed to test now.

regards, tom lane