On Wed, 13 Dec 2023 at 11:50, r.c.hoekstra <r.c.hoeks...@scarlet.nl> wrote: > > Hi, > > > I need to choose a fast PRNG, but the apache commons RNG user guide has > a broken link to the page with benchmarks (the user guide page is here: > https://commons.apache.org/proper/commons-rng/userguide/rng.html#a4._Performance)
This is the correct place. Scroll down and you can see tables of results for all the RNGs in the library. Choosing a PRNG is a trade off between the period of the RNG and the speed. Within a family of RNGs the larger the state size the larger the period and the slower the RNG. For single thread applications a 128-bit state size will be adequate. If you are using multiple concurrent RNGs then a larger period will ensure that you reduce the chance of sequence collision (i.e. overlap). Also look at the quality of the output: https://commons.apache.org/proper/commons-rng/userguide/rng.html#a5._Quality Ideally you should choose a RNG that passes TestU01 (BigCrush) and PractRand. > The 404 points to here: > https://commons.apache.org/proper/commons-rng/commons-rng-examples/examples-jmh/apidocs/org/apache/commons/rng/jmh/package-summary.html This link may have been for an old javadoc location. You can find the javadoc here: https://commons.apache.org/proper/commons-rng/commons-rng-examples/commons-rng-examples-jmh/apidocs/index.html I do not think it is very useful but at least it does show what we have benchmarked. I will fix the link in the source. Regards, Alex --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
