Optimise numeric division for 3 and 4 base-NBASE digit divisors. On platforms with 128-bit integer support, introduce a new function div_var_int64(), along the same lines as div_var_int() added in d1b307eef2 for divisors with 1 or 2 base-NBASE digits, and use it to speed up div_var() and div_var_fast() in a similar way when the divisor has 3 or 4 base-NBASE digits. This gives significant performance gains for divisors with 9-16 decimal digits. Joel Jacobson. Discussion: https://postgr.es/m/b7a5893d-af18-4c0b-8918-96de5f1bbf39%40app.fastmail.com https://postgr.es/m/CAEZATCXGm%3DDyTq%3DFrcOqC0gPMVveKUYTaD5KRRoajrUTiWxVMw%40mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/0aa38db56bf459d04ed58c22f7c689c0ae14e977 Modified Files -------------- src/backend/utils/adt/numeric.c | 167 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 167 insertions(+)
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