Alex D Herbert created RNG-105:
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Summary: Use the KempSmallMeanPoissonSampler in the
LargeMeanPoissonSampler
Key: RNG-105
URL: https://issues.apache.org/jira/browse/RNG-105
Project: Commons RNG
Issue Type: Improvement
Components: sampling
Affects Versions: 1.3
Reporter: Alex D Herbert
Assignee: Alex D Herbert
Fix For: 1.3
The LargeMeanPoissonSampler requires a Poisson sample using a mean less than 1.
This is the fractional component of the large mean.
The KempSmallMeanPoissonSampler outperforms the SmallMeanPoissonSampler when
the mean is less than 1. This can be significant if the underlying generator is
slow. The Kemp sampler only requires a single uniform deviate.
Switch the algorithm used in the LargeMeanPoissonSampler.
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