This is highly problem dependent... and you appear to already know the answer.
Note that some differential evolution solution approaches may benefit from
parallelizing evaluation of generations since within that sub-problem the
optimization dependencies don't apply.
A theoretical discussion fo
More of a general query, but looking to see if others have successfully used
something like the foreach package (or other parallel style functions) with
certain functions that minimize likelihood or objective functions (e.g.,
optim/nlminb).
I have had great success with embarrassingly parallel
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