mirror of
https://github.com/postgres/postgres.git
synced 2026-04-15 22:10:45 -04:00
3804539e48
Standardize on xoroshiro128** as our basic PRNG algorithm, eliminating a bunch of platform dependencies as well as fundamentally-obsolete PRNG code. In addition, this API replacement will ease replacing the algorithm again in future, should that become necessary. xoroshiro128** is a few percent slower than the drand48 family, but it can produce full-width 64-bit random values not only 48-bit, and it should be much more trustworthy. It's likely to be noticeably faster than the platform's random(), depending on which platform you are thinking about; and we can have non-global state vectors easily, unlike with random(). It is not cryptographically strong, but neither are the functions it replaces. Fabien Coelho, reviewed by Dean Rasheed, Aleksander Alekseev, and myself Discussion: https://postgr.es/m/alpine.DEB.2.22.394.2105241211230.165418@pseudo |
||
|---|---|---|
| .. | ||
| geqo_copy.c | ||
| geqo_cx.c | ||
| geqo_erx.c | ||
| geqo_eval.c | ||
| geqo_main.c | ||
| geqo_misc.c | ||
| geqo_mutation.c | ||
| geqo_ox1.c | ||
| geqo_ox2.c | ||
| geqo_pmx.c | ||
| geqo_pool.c | ||
| geqo_px.c | ||
| geqo_random.c | ||
| geqo_recombination.c | ||
| geqo_selection.c | ||
| Makefile | ||