>I am trying to improve the performance of my application and looking for a resource of optimized function/operators v/s non-optimized.
>
>For example between() function and operator == are non optimized.
>
>Thanks
>Narinder Sran

See Chapter 15, Optimizing Applications, in the Programmer's Guide. It has section 'Optimizing Rushmore Expressions' in it. The Programmer's Guide is a part of Foxpro help.