[Freesurfer] Using tmpfs to speed up recon-all

Hi, I've noticed recon-all (-all) doesn't really grind my cpu as intensely as it might, which makes me wonder if it might be more I/O limited, which further makes me wonder if I could get any kind of speedup using a tmpfs to store the subject's directory while running recon-all, and then copying the results back to disk when I'm done.

Does anyone know how I/O limited recon-all is (I realize it consists of many tasks, but if even some of them would be significantly sped up by putting their data in memory, it'd be worth my time).

Also, do all recon-all components store their scratch data (if they have it) in the subject directory? or do they go somewhere else (like /tmp or /var)?

Thanks for the help

--Luke Hospadaruk