[Freesurfer] Running selxavg with many (~5000) different conditions

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Hi,

I'm currently running an analysis that requires defining each of 5000 stimuli as a condition during processing, and for each subject, I have about 140 runs.

As a result, selxavg is taking a very long time and huge amounts of memory to run.

For instance, it has gotten about 5 runs into "GLS Beta Pass" after 60 hours of running with 200G.

Is there a way to (a) predict based on runs and conditions how long and how much compute power selxavg will need to run? (b) speed up running selxavg (maybe there is a lighter-weight version of selxavg that requires less compute power?

Thanks very much for any input, Anna