Odesolve vs. Rkadapt

John Rudnicki wrote: Curious minds want to know: I am solving a simple (linear) ode for a number of various parameters. When I use Odesolve, passing the various parameters, it runs relatively slowly compared with using Rkadapt passing the parameters via the initial conditions (since I have a lot of cases to look at, using Rkadapt seems the better choice). Why is this? Is it typical?

The way you use the solve block function you force the solve block to be evaluated for every single point which is plotted and that are quite a few.

If you precalculate the odesolve function just once with the parameters needed and use this I guess its equally fast (apart from the effort the odesolve solution has to put into interpolating).

See attached.