Re: Faster "SET search_path" - Mailing list pgsql-hackers

From Nathan Bossart
Subject Re: Faster "SET search_path"
Date
Msg-id 20230802050720.GB866741@nathanxps13
Whole thread Raw
In response to Re: Faster "SET search_path"  (Jeff Davis <pgsql@j-davis.com>)
Responses Re: Faster "SET search_path"
Re: Faster "SET search_path"
List pgsql-hackers
On Mon, Jul 31, 2023 at 10:28:31PM -0700, Jeff Davis wrote:
> On Sat, 2023-07-29 at 12:44 -0400, Isaac Morland wrote:
>> Essentially, "just" observe efficiently (somehow) that no change is
>> needed, and skip changing it?
> 
> I gave this a try and it speeds things up some more.
> 
> There might be a surprise factor with an optimization like that,
> though. If someone becomes accustomed to the function running fast,
> then changing the search_path in the caller could slow things down a
> lot and it would be hard for the user to understand what happened.

I wonder if this is a good enough reason to _not_ proceed with this
optimization.  At the moment, I'm on the fence about it.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com



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