Is there a benchmark of it compared to Mnesia with duplicate_bag tables using dirty read/writes (basically ETS that is DETS backed at that point) and similar settings for PersistentEts? 
Does it only persist to disk ‘on occasion’ or after every write? Does it do it when the owner process is terminated? I’m guessing via the file2tab and such that it is serializing out the entire ETS table every write out instead of only the differences?
