Purchase Orders Import using FBDI Process taking long time for 6000 records

Summary:

Need a way to improve Purchase Order import process (Import Orders) timing.

Content (required):

Currently we see that when we load around 6000 records in 1 Batch in the system through FBDI process (Import Orders), the time taken to complete this is around 50 Mins.

It should process the record earlier and now the time taken is more

It was thought that import of 60,000 POs with around 1 lakh lines itself will take 1 to 1.5 Hrs.

Requesting support on the below mentioned queries :-

1) Why it is taking this long time for only 6000 PO records import through FBDI & is there any way to lower this runtime and improve the performance.