Nd solve stiffness test nonstifftest method option

a = {{0., 1.}, {2623.532160943381, -69.56342161343568}};

{Abs[First[Eigenvalues[a]]], Norm[a, 1], Norm[a, Infinity]}

{96.69535685979352, 2623.532160943381, 2693.0955825568167}

Options[NDSolve`SubspaceIteration]

{}

Options[NDSolve`KrylovIteration]

{}