Re: Cutting initdb's runtime (Perl question embedded)

Andreas Karlsson <andreas(at)proxel(dot)se> writes:
> Here is my proof of concept patch. It does basically the same thing as
> Andres's patch except that it handles quoted values a bit better and
> does not try to support anything other than the regproc type.

> The patch speeds up initdb without fsync from 0.80 seconds to 0.55
> seconds, which is a nice speedup, while adding a negligible amount of
> extra work on compilation.

I've pushed this with some mostly-cosmetic adjustments:

* created a single subroutine that understands how to split DATA lines,
rather than having several copies of the regex

* rearranged the code so that the data structure returned by
Catalog::Catalogs() isn't scribbled on (which was already
happening before your patch, but it seemed pretty ugly to me)

* stripped out the bootstrap-time name lookup code from all of reg*
not just regproc.

There's certainly lots more that could be done in the genbki code,
but I think all we can justify at this stage of the development
cycle is to get the low-hanging fruit for testing speedups.

regards, tom lane