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Performance

The IFS Web Client has quite a few performance optimizations, few of which a Java page programmer needs to worry about. However, clumsy or unconventional programming can invalidate some performance optimizations. There are a few things a programmer should think of:

• Use preDefine() to configure most property settings on the various objects defined in this function. It is these settings that will be cached and cloned for future use. Define properties as sparsely as possible in adjust().
• Avoid accessing the database when not really needed. A typical example of an unnecessary database access could be to populate a detail ASPRowSet when only the master ASPRowSet is visible (probably as a table).

Even without consideration for the IFS Web Client framework the Java programming can be made in different ways when regarding the performance. There are a lot of books and articles about Java and performance and describing all possible constructions that can affect performance is outside the scope of this document.