transaction fee

Question

If paytaxfee is 0 by default does it make sense then to use -sendfreetransactions and would the second option isted of the default 0 fee have any sort of performance impact on a system with large number of transactions per second.

-paytxfee=<amt>        Fee (in BTC/kB) to add to transactions you send (default: 0.00)
-sendfreetransactions  Send transactions as zero-fee transactions if possible (default: 0)

Answer 1

None of this should make much difference to performance, especially if you're using the default of having no native currency for your blockchain.