| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com> |
| Cc: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Auto-vectorization speeds up multiplication of large-precision numerics |
| Date: | 2020-09-07 01:44:15 |
| Message-ID: | 1617581.1599443055@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com> writes:
> I did as above. Attached is the v2 patch.
I made some cosmetic changes to this and committed it. AFAICT,
there's no measurable performance change to the "numeric" regression
test, but I got a solid 45% speedup on "numeric_big", so it's
clearly a win for wider arithmetic cases.
It seemed to me to be useful to actually rename CFLAGS_VECTOR
if we're changing its meaning, so I made it CFLAGS_VECTORIZE.
regards, tom lane
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