Domino Connection performs synchronous calls into the C-API of Domino and adds some overhead used for object construction and error handling. In fact a well written VA Smalltalk Domino Connection program is not considerably slower than a C program performing the same task. On the other hand Domino Connection offers a fairly high level of abstraction and a very convenient programming model. In some situations it is useful to think about the abstractions and resulting performance optimization. At the end of this section you will find two sample applications: one written carelessly, the other optimized for performance.