[ORACLE 12c] inmemory + parallel in the alter table DDL

hello,

is there any reason to expect performance enhancement during an inmemory loading process or not ?

Currently, we do:

alter table ONETABLE <inmemory clause> parallel 18;

and I just tested the same DDL without the parallel clause (prior to this, I passed the noparallel clause) and I can see *NO* decrease in the load process.

So, does it change something for the LOAD INMEMORY or not ?

Regards

Xavier