Re: speed up verifying UTF-8

Vladimir Sitnikov <sitnikov.vladimir@gmail.com>

From: Vladimir Sitnikov <sitnikov.vladimir@gmail.com>

To: John Naylor <john.naylor@enterprisedb.com>

Cc: Amit Khandekar <amitdkhan.pg@gmail.com>, Heikki Linnakangas <hlinnaka@iki.fi>, pgsql-hackers <pgsql-hackers@postgresql.org>

Date: 2021-07-16T05:44:06Z

Lists: pgsql-hackers

Have you considered shift-based DFA for a portable implementation
https://gist.github.com/pervognsen/218ea17743e1442e59bb60d29b1aa725 ?

Vladimir

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Simplify coding style of is_valid_ascii()
- 6b41a1579bd3 16.0 landed
Apply auto-vectorization to the inner loop of numeric multiplication.
- 88709176236c 14.0 cited