John Naylor e24d77080b 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

2025-01-17 16:29:25 +07:00

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