Re: Set arbitrary GUC options during initdb

I wrote:
> Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> writes:
>> I would remove the
>> #if DEF_PGPORT != 5432
>> This was in the previous code too, but now if we remove it, then we
>> don't have any more hardcoded 5432 left, which seems like a nice
>> improvement in cleanliness.

> Hm. That'll waste a few cycles during initdb; not sure if the extra
> cleanliness is worth it. It's not like that number is going to change.

After further thought I did it as you suggest. I think the only case
where we really care about shaving milliseconds from initdb is in debug
builds (e.g. buildfarm), which very likely get built with nondefault
DEF_PGPORT anyway.

I did get a bee in my bonnet about how replace_token (and now
replace_guc_value) leak memory like there's no tomorrow. The leakage
amounts to about a megabyte per run according to valgrind, and it's
not going anywhere but up as we add more calls of those functions.
So I made a quick change to redefine them in a less leak-prone way.

regards, tom lane