The impact of parsing on overall performance is extremely variable. In some cases, it’s simply not noticeable. In other cases, it’s one of the major causes of performance problems. If you have problems with parsing, it usually means the application doesn’t handle it correctly. This is a major problem, because more often than not, to change the behavior of an application, you need to modify the code considerably. Developers need to be aware of the implications of parsing and how to write code in such a way as to avoid, as much as possible, the problems associated with it.
Chapter 2 describes the life cycle of a cursor and how ...