Re: Optimize mul_var() for var1ndigits >= 8

Joel Jacobson <joel@compiler.org>

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From: "Joel Jacobson" <joel@compiler.org>

To: "Dean Rasheed" <dean.a.rasheed@gmail.com>

Cc: "Tom Lane" <tgl@sss.pgh.pa.us>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2024-08-13T07:50:44Z

Lists: pgsql-hackers

Attachments

test-mul_var-init.sh (text/x-sh)
test-mul_var-verify-v4.sh (text/x-sh)
test-mul_var-verify-v5.sh (text/x-sh)

On Tue, Aug 13, 2024, at 09:49, Joel Jacobson wrote:
> I reran the tests and v5 produces much fewer diffs than v4.
> Not sure if the remaining ones are problematic or not.

Attaching scripts if needed.

Regards,
Joel

Commits

Optimise numeric multiplication using base-NBASE^2 arithmetic.
- 8dc28d7eb868 18.0 landed
Extend mul_var_short() to 5 and 6-digit inputs.
- c4e44224cf61 18.0 landed