Horton

Use perfect hash for NFC and NFKC Unicode Normalization quick check

Michael Paquier <michael@paquier.xyz>

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Commit: 80f8eb79e24d9b7963eaf17ce846667e2c6b6e6f
Author: Michael Paquier <michael@paquier.xyz>
Date: 2020-10-11T10:09:01Z
Releases: 14.0 
Use perfect hash for NFC and NFKC Unicode Normalization quick check

This makes the normalization quick check about 30% faster for NFC and
50% faster for NFKC than the binary search used previously.  The hash
lookup reuses the existing array of bit fields used for the binary
search to get the quick check property and is generated as part of "make
update-unicode" in src/common/unicode/.

Author: John Naylor
Reviewed-by: Mark Dilger, Michael Paquier
Discussion: https://postgr.es/m/CACPNZCt4fbJ0_bGrN5QPt34N4whv=mszM0LMVQdoa2rC9UMRXA@mail.gmail.com

Files

PathChange+/−
src/common/unicode/generate-unicode_normprops_table.pl modified +39 −2
src/common/unicode_norm.c modified +27 −21
src/include/common/unicode_normprops_table.h modified +1609 −1
src/tools/pgindent/exclude_file_patterns modified +5 −0
src/tools/pgindent/typedefs.list modified +1 −0

Discussion