RandomDataImpl.nextPoisson() is extreme slow for large lambdas
--------------------------------------------------------------
Key: MATH-197
URL: https://issues.apache.org/jira/browse/MATH-197
Project: Commons Math
Issue Type: Bug
Affects Versions: 1.2
Environment: jdk1.6.0_04, windows xp
Reporter: Tolja Zubow
The RandomDataImpl.nextPoisson() is extreme slow for large lambdas:
E.g. drawing 100 random numbers with lambda = 1000 takes around 10s on my dual
core with 2.2GHz.
With lambda smaller than 500 everything is fine. Any ideas?
RandomDataImpl r = new RandomDataImpl();
r.reSeed(101);
int d = 100;
long poissonLambda = 1000;
long st = System.currentTimeMillis();
for (int row = 0; row < d; row++) {
long nxtRnd = r.nextPoisson(poissonLambda);
}
System.out.println("delta " + (System.currentTimeMillis() - st));
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
