Re: Some improvements to numeric sqrt() and ln()

From: David Steele <david(at)pgmasters(dot)net>
To: Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Some improvements to numeric sqrt() and ln()
Date: 2020-03-04 14:41:16
Message-ID: cad86d62-fea1-ea1d-753d-3ca93a74f7a4@pgmasters.net
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Hi Dean,

On 2/28/20 3:15 AM, Dean Rasheed wrote:
> Attached is a WIP patch to improve the performance of numeric sqrt()
> and ln(), which also makes a couple of related improvements to
> div_var_fast(), all of which have knock-on benefits for other numeric
> functions. The actual impact varies greatly depending on the inputs,
> but the overall effect is to reduce the run time of the numeric_big
> regression test by about 20%.

Are these improvements targeted at PG13 or PG14? This seems a pretty
big change for the last CF of PG13.

Regards,
--
-David
david(at)pgmasters(dot)net

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