Is there any guidance on how to estimate the memory footprint of the Longitudinal steam? 

We are trying to process the MacLaren test-retest dataset [1] (40 timepoints per subject) with the longitudinal stream in v7.1.1 and are running into memory errors during `mri_fuse_segmentations`.

Thanks,

-Paul

[1]: https://openneuro.org/datasets/ds000239/versions/00001