Thread: pgsql: Improve set of candidate multipliers for perfect hash function g
Improve set of candidate multipliers for perfect hash function generation The previous set of multipliers was not adapted for large sets of short keys, and this new set of multipliers allows to generate perfect hash functions for larger sets without having an impact for existing callers of those functions, as experimentation has showed. A future commit will make use of that to improve the performance of unicode normalization. All multipliers compile to shift-and-add instructions on most platforms. This has been tested as far back as gcc 4.1 and clang 3.8. Author: John Naylor Reviewed-by: Mark Dilger, Michael Paquier Discussion: https://postgr.es/m/CACPNZCt4fbJ0_bGrN5QPt34N4whv=mszM0LMVQdoa2rC9UMRXA@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/2a7316458164369436e252e5e60a5957b17103c3 Modified Files -------------- src/tools/PerfectHash.pm | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)