| From: | John Naylor <john(dot)naylor(at)postgresql(dot)org> |
|---|---|
| To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
| Subject: | pgsql: Speed up hex_encode with bytewise lookup |
| Date: | 2025-01-17 09:38:00 |
| Message-ID: | E1tYing-0023U1-0N@gemulon.postgresql.org |
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| Thread: | |
| Lists: | pgsql-committers |
Speed up hex_encode with bytewise lookup
Previously, hex_encode looked up each nibble of the input
separately. We now use a larger lookup table containing the two-byte
encoding of every possible input byte, resulting in a 1/3 reduction
in encoding time.
Reviewed by Tom Lane, Michael Paquier, Nathan Bossart, David Rowley
Discussion: https://postgr.es/m/CANWCAZZvXuJMgqMN4u068Yqa19CEjS31tQKZp_qFFFbgYfaXqQ%40mail.gmail.com
Branch
------
master
Details
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https://git.postgresql.org/pg/commitdiff/e24d77080b365265f3c854f64e71518622883678
Modified Files
--------------
src/backend/utils/adt/encode.c | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
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