On 02/04/2016 04:13 PM, Gilles wrote:
On Thu, 4 Feb 2016 14:10:39 -0600, Ole Ersoy wrote:
Hi,
Has anyone performed any benchmarking on lazy vs. unlazy
Evaluation(s)
Someone did:
https://issues.apache.org/jira/browse/MATH-1128
or is there some obvious criteria on when to use one vs.
the other? I only see getResiduals() being called once in the
optimize() method right after a new evaluation is created:
current = problem.evaluate(new
ArrayRealVector(currentPoint));
currentResiduals = current.getResiduals().toArray();
Thoughts?
The problem is "getJacobian()", called only in the outer loop.
Method "evaluate" is also called in an inner loop where only
the residuals are used.
So if the optimizer is supplied with individual function implementations that
are called to calculate residuals and the jacobian matrix 'on demand / when
needed' then the question of whether to use a lazy evaluation vs. the regular
evaluation goes away (I think without any drawbacks)?
Ole
Gilles
TIA,
Ole
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