Re: Speeding up ruleutils' name de-duplication code, redux - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Speeding up ruleutils' name de-duplication code, redux
Date
Msg-id 3657865.1726000560@sss.pgh.pa.us
Whole thread Raw
In response to Re: Speeding up ruleutils' name de-duplication code, redux  (David Rowley <dgrowleyml@gmail.com>)
List pgsql-hackers
David Rowley <dgrowleyml@gmail.com> writes:
> On Wed, 11 Sept 2024 at 03:06, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> We could accomplish what you suggest by re-ordering the calls so that
>> we build the hash table before enlarging the array.  0001 attached
>> is the same as before (modulo line number changes from being rebased
>> up to HEAD) and then 0002 implements this idea on top.  On the whole
>> though I find 0002 fairly ugly and would prefer to stick to 0001.
>> I really doubt that scanning any newly-created column positions is
>> going to take long enough to justify intertwining things like this.

> I'm fine with that.  I did test the performance with and without
> v2-0002 and the performance is just a little too noisy to tell. Both
> runs I did with v2-0002, it was slower, so I agree it's not worth
> making the code uglier for.
> I've no more comments. Looks good.

Thanks for the review!  I'll go push just 0001.

            regards, tom lane



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