Has anyone had experience with adding massive numbers of Invoices , etc? I am messing with the suitetalk api and finding so far that on average for 40 invoices it is a little over 70 seconds with upsertlist which will take above 24 hours with the exact number we need to import. Any advice on speeding that up or is upsertlist going to be the fastest?

We are upserting a couple of thousand sales orders and invoices via the API, and batch them like 20 per request (I don't want to have API requests that take forever too). The "trick" is to buy a SuiteCloud license and do the sync in 8 parallel jobs/threads.