Speeding up PhylophlAn

I’m running PhyloPhlAn on a rather large genome set (~20k). I’m trying to figure out the best computational resources to give it for this task. From the most recent paper it looks like 100 CPUs at 10 days would do it for 17k genomes. So more cores the better? What about memory? I experimented with a high mem volume, and it didn’t really speed things up. Is there a way for PhyloPhlAn to use more memory? Thanks!