[Octave-bug-tracker] [bug #60539] Slow performance of betaincinv.m

[Rik]

Follow-up Comment #3, bug #60539 (project octave):

Of course, I haven't looked at the value of the derivative of the objective
function for various input values.  It may be that for some values F' is very
small, even 0, and so bisection would converge faster than Newton's Method.

It still seems like we might want to use a stopping criterion for the
bisection rather than always executing 10 rounds.

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