ENH: Optimization for small ellipses.
ENH: Optimization for small ellipses.

For an ellipse of size 2 we were requesting 26 iterations, anything less
than 4 was drastically increasing the number of iterations. This now
returns a more sensible 7 for an ellipse of size 2.

Change-Id: I40997076882b12bb124af377175d40f0cc8dae8b

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