Reducing allocations with inplace interpolation outputs

[csvance]

Question❓

Is there a way with the current interface to pre-allocate interpolation outputs? I have a problem where I have 6 different splines of varying degrees (linear, cubic, quintic) and I am getting killed on allocations when using them for ODE applications. I know zero allocations is possible for my problem because I patched Dierckx to support it. But now I need to use autodiff on the same set of splines to solve a non linear optimization problem and Dierckx doesn't seem to work with how autodiff works in Julia.

[csvance]

I dug through the code and it looks like there is an option to do interpolator(out, t) to avoid allocations. This reduced my allocations inside my derivative function from 13 to 0.

Maybe I could do a pull request adding this to the docs somewhere? Or maybe its there somewhere but without the keywords alloc / allocation / inplace.