We did spend a lot of time optimizing our ETL software and here is what we were able to achieve so far:

Loading data into Oracle database via direct path loading from a text file

Version 28000 rec/second

Version 46000 rec/second

Version 84000 rec/second

Version 94000 rec/second

Version 101000 rec/second

Version 210000 rec/second

There a lot of ways to make our software better, we will continue working on improving performance and will publish our results here.

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