Use Async Services
A boolean indicating if you would like to use asynchronous services when inserting, updating, and deleting.
NetSuite responses can be fairly slow, especially when inserting, updating, or deleting many records at a time. In these situations it is best to use asynchronous services to submit the data. Asynchronous services allow NetSuite to process the data while your application continues executing. The downside of using asynchronous services is that you will need to check the Job in NetSuite to see if NetSuite has finished processing the request and see if there were any issues.