[MATH-1155] Speedup initialization of WellXXX rngs

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.3
• Fix Version/s: 4.0
• Assignee: Unassigned
• Reporter: Thomas Neidhart
• Created: 06/Oct/14 21:35
• Updated: 24/Feb/15 21:49
• Resolved: 24/Feb/15 21:49

Description

As identified in MATH-1154, initialization of the WellXXX rngs is quite costly as some internal arrays have to be computed.

Most of these initializations are specific to the type of rng, e.g. Well19937a and will not change afterwards, thus could be initialized in a static way.

Due to implementation details, i.e. the relevant fields are declared protected in the base class AbstractWell, such a change would not be backwards compatible and will have to be postponed to 4.0