https://github.com/predict-idlab/tsdownsample/blob/c3c25da4af8ae807177c6005da72ce442fd18999/downsample_rs/src/minmaxlttb/generic.rs#L30 Inserting at 0 performs a huge `memcopy` op all elements in the Vec / Array <!-- Some ideas that currently come up to me; * Use mut `vec` with capacity of `minmax_ratio` * `n_out` + 2 and add the MinMax preselected data at index 1? -->
