As a courtesy to the Monks, you should have included a link to your previous thread, Referencing in Function not working correctly..

Note also, this is an "I want a pony" question. We have no obligation to give you a pony.

Explain why you believe this to be other than "as efficient as possible" and support that belief with test results, benchmarks against comparable functions or some other data that shows you've put some effort into this beyond begging for a pony.